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14-104556--1 F�L � r• � sa CITY OF �. Federal November 13, 2014 Christine Mullen City of Federal Way - PW 33325 81h Avenue South Federal Way, WA 98003 CITY HALL Way 33325 8th Avenue South Federal Way, WA 98003-6325 (253) 835-7000 www.cityoffederalway.com RE: File #14-104556-00-SE; SEPA THRESHOLD DETERMINATION S. 300 Street/281h Ave S. Intersection Improvements Dear Christine: The city has reviewed the environmental checklist submitted with the Use Process III and Shoreline Substantial Development Permit for the S. 304th Street/28th Ave S. Intersection Improvement project. It has been determined that the proposal will not have a probable significant adverse impact on the environment. As a result, an Environmental Impact Statement (EIS) is not required to comply with the State Environmental Policy Act (SEPA). A copy of the Determination of Nonsignificance (DNS) is enclosed. The Optional DNS Process was used to review this proposal. The 14-day comment period required by the SEPA rules ran concurrently with the public comment period associated with the notice of land use application, which began on October 3, 2014, and ended October 20, 2014. The city received two comment letters regarding the project. Pursuant to Washington Administrative Code (WAC) 197-11-355, a second comment period is not required upon issuance of the DNS. The enclosed DNS was issued on November 13, 2014. The city will provide a copy of the DNS to the Department of Ecology, agencies with jurisdiction, Puyallup and Muckleshoot tribes, and anyone requesting a copy. All final determinations may be appealed within 21 days following the issuance of the DNS. No licenses, permits, or approvals will be issued until completion of the appeal period, which ends December 4, 2014. Our decision not to require an EIS does not mean that the license, permit, or approval you are seeking from the city has been granted. Approval or denial of the proposal will be made by the appropriate administrative or legislative body vested with that authority. After a final decision has been made on your proposal (i.e., after a permit hasbeen issued), you may, but are not required to, publish a Notice of Action as set forth in RC W 43.21 C.075. The Notice of Action sets forth a time period after which no legal challenges regarding the proposal's compliance with SEPA can be made. A copy of the Notice of Action form and copies of RCW 43.21C.080 and WAC 197-11-680 providing instructions for giving this notice are available from the Department of Community Development. The city is not responsible for publishing the Notice of Action. However, the city is responsible for giving a notice (to parties of record) stating the date for commencing a judicial appeal (including the SEPA portion Christine Mullen November 13, 2014 Page 2 of that appeal) if your proposal is one for which the city's action on it has a specified time period within which any court appeals must be made. Questions regarding the environmental review component should be directed to me at 253-835-2634 or stacey.welsh@cityoffederalway.com. Sincerely, Stacey Welsh, AICP Senior Planner enc: DNS 14-104556 'Doc. I.D. 66976 F1 6.wm CITY OF �. Federal Way DETERMINATION OF NONSIGNIFICANCE (DNS) S. 304th Street/281h Ave. S. Intersection Improvements File No: 14-104556-00-SE Proposal: The proposal consists of installing a traffic signal and street lights, and constructing a northbound right turn lane at the intersection of 28`h Ave. S. and S. 304th St. The northbound turn lane will require roadway widening, including right-of-way acquisition on up to 3 parcels, and a Shoreline Permit since the widening occurs within 200 ft. of Steel Lake. Proposed improvements include: installing curb, gutter, and sidewalk at the southeast corner of the intersection; a retaining wall to mitigate impacts to private property on the east side of 28`h Ave. S; improving the existing stormwater system (including adding treatment where none currently exists); incorporating low impact development and natural practices to the maximum extent possible; utility vault and pole relocations and/or adjustments; and access revisions (driveways) to private properties. Proponent: Christine Mullen, City of Federal Way Public Works, 33325 8th Avenue South, Federal Way, WA 98003 Location of proposal: S. 304th Street/28th Ave. S. Intersection, Federal Way Lead Agency: City of Federal Way Staff Contact: Senior Planner Stacey Welsh, AICP, 253-835-2634 The lead agency for this proposal has determined that it does not have a probable significant adverse impact on the environment, and an environmental impact statement (EIS) is not required under RCW 43.21 C.030(2)(c). This decision was made after review of a completed environmental checklist, Federal Way Comprehensive Plan, and other municipal policies, plans, rules, and regulations designated as a basis for exercise of substantive authority under the State Environmental Policy Act pursuant to RCW 43.21C.110. This information is available to the public on request. This DNS is issued after using the optional DNS process in WAC 197-11-355. Two written comments were received in response to the 14-day comment period that ended October 20.2014. There is no further commentperiod on the DNS. You may appeal this determination to the Federal Way City Clerk (address below), no later than 5:00 p.m. on December 4, 2014, by a written letter stating the reason for the appeal of the determination and associated fee. You should be prepared to make specific factual objections. Responsible Official: Isaac Conlen, Planning Manager, for Title: Larry Frazier, Interim Director of Community Development Address: 33325 8t" Avenue South, Federal Way, WA 98003 Phone: 253-835-2643 Date Issued: November 13 2014 Signature. Doc...D. 66975 1�kCITY OF Federal November 5, 2014 Peggy Fuller 30419 281h Avenue South Federal Way, WA 98003 CITY HALL 33325 8th Avenue South FederaWay l Way, WA 98003-6325 (253) 835-7000 www cityoffederalway. com RE: File #14-104556-00-SE; RETENTION OF DETERMINATION OF NONSIGNIFICANCE (DNS) S. 304th Street/28`h Ave S. Intersection Improvements Project Dear Ms. Fuller: This letter is to notify you that the Community Development Department and Public Works Streets Division staff have reviewed your comment letter received on October 7, 2014, regarding the S. 304th Street/28th Ave S. Intersection Improvements Project. The department will retain the State Environmental Policy Act (SEPA) threshold determination of a Determination of Non -Significance (DNS) as the proposal is not anticipated to cause significant adverse environmental impacts that would require preparation of an Environmental Impact Statement (EIS). The DNS is not a land use decision or a permit to authorize construction; it is a determination that an EIS is not required. Your letter contained some specific concerns regarding possible impacts to your property. The widening of the street to accommodate the northbound right turn lane will all occur on the east side of 28`h Ave S and should not impact your parcel. There should be no impacts to the hammerhead area where you park; no relocation of the utility poles on the west side of 286' Ave S; and no relocation of your mailbox. We appreciate your questions about the project and want to assure you that if there were any planned impacts to your property, that we would discuss them with you in advance of construction. if you have any questions regarding this letter or the Use Process III or Shoreline Substantial Development Perm it land use applications, please contact Stacey Welsh, Senior Planner, at 253-835-2634 or stacey.welshReityoffederalway.com. If you have questions regarding the street improvement project, please contact Christine Mullen, Street Systems Project Engineer, at 253-835-2723 or christine.mullen .ci offederalwa .com. S incerely, Isaac Conlen Planning Manager c: Stacey Welsh, Senior Planner Christine Mullen, Street Systems Project Engineer Doc LD 67129 14-104556 CITY OF Federal Allay November 5, 2014 CITY HALL 33325 8th Avenue South Federal Way, WA 98003-6325 (253) 835-7000 www.cityoffederalway.com Gary Smith PO Box 6034 Federal Way, WA 98063 RE: File #14-104556-00-SE; RETENTION OF DETERMINATION OF NONSIGNIFICANCE (DNS) S. 304th Street/281h Ave S. Intersection Improvements Project Dear Mr. Smith: This letter is to notify you that the Community Development Department and Public Works Streets & Traffic Divisions staff have reviewed your October 9, 2014, comment letter received on October 21, 2014, regarding the S. 304th Street/28th Ave S. Intersection Improvements Project. The department will retain the State Environmental Policy Act (SEPA) threshold determination of a Determination of Non - Significance (DNS) as the proposal is not anticipated to cause significant adverse environmental impacts that would require preparation of an Environmental Impact Statement (EIS). The DNS is not a land use decision or a permit to authorize construction; it is -a determination that an EIS is not required. Regarding your comments about the need for the project, there are specific analyses that are completed to determine if a signal is warranted or not at an intersection. According to Washington State statutes, justification for a new signal is met if the proposed location satisfies at least one of the minimum traffic operational warrants delineated within the FHWA/USDOT's Manual of Uniform Traffic Control Devices for Streets and Highways (MUTCD). This project met two of the signal warrants - Warrant # 1 Eight -Hour Vehicular Volume, and Warrant #2 Four -Hour Vehicular Volume. The traffic study that was completed for this intersection concluded that a signal is warranted and recommended in this location. In regards to your concerns about the topography and access from driveways, the widening for the new northbound right turn lane will all occur on the east side of 28th Ave S. Construction of retaining walls along the east side of 286' Ave S will be needed to address the topography; however, access will not be restricted to any of the properties. We are coordinating with any affected property owners. Your letter mentioned that you feel that the installation of a sewer serving the properties along the east side of 28th Ave S should be constructed. The City of Federal Way does not manage the sewer utility system. This is within the purview of the Lakehaven Utility District. You state that the short notice given to the public is unacceptable and action should not be taken without a public hearing. What you received in the mail was a Notice of Application regarding the land use applications that are required for the project. The Notice of Application lists a code -provided 15-day comment period. The project requires a SEPA threshold determination, a Use Process III land use application, and a Shoreline Substantial Development Permit because a portion of the project is within 200' of Steel Lake. These three items require approval by the Director of Community Development and a public hearing is not required. None of these decisions have been issued. If you have additional comments please provide them to us. Mr. Smith November 5, 2014 Page 2 If you have any questions regarding this letter or the Use Process III or Shoreline Substantial Development Permit land use applications, please contact Stacey Welsh, Senior Planner, at 253-835-2634 or Stacey.welsh&ityoffedem1way.com. If you have questions regarding the street improvement project, please contact Christine Mullen, Street Systems Project Engineer, at 253-835-2723 or christine.mullen{c ci) offederalway.com. Sincerely, Isaac Conlen Planning Manager c: Stacey Welsh, Senior Planner Christine Mullen, Street Systems Project Engineer 14-104556 Doe.1.D. 67127 RECEIVED BY COMMUNITY & ECONOMIC DEVELOPMENT DEPARTMENT City of Federal Way 33325 91h Avenue South Federal Way, Washington 98003 Mr. Issac Conlen Planning Manager Dear Sir. DEC 01 Z014 November 241h, 2014 Thank you for all of the pertinent information concerning the possible traffic light at 28th and 304th. Let me attempt to put this into a capsule by also attaching my last letter of concern as both this letter and the attached are germane to concerns of the project. Twenty Eighth Avenue was build at the turn of the 20th century. It was designed as a rural street that could facilitate persons owning homes and cabins on Steel Lake. It was unincorporated until annexed by Federal Way. It was never designed to handle the traffic that 317th has attracted. The street is narrow and the homes are part of the rolling topography. To later install sidewalks would mean annexing private property via imminent domain. Even then, the continued harassment would be untenable. In other words, this is like a thimble. Remember the thimble? It was NEVER designed to accommodate one's thumb. Twenty Eighth Avenue was never designed for the use it receives. This is the best analogy I can use. In other words, some things should be best left alone because the final result would be more megalopolis mistakes as "one thing leads to another". My attached letter, are well documented. No accidents and a free flowing street with NEVER a backup. Also your proposed partial pedestrian sidewalk for the East side of 28th street will hardly ever be used. Walkers almost always walk on the West side of the street (in front of my home) because of the hill to the South. Having no sidewalks and walking down the East side, with cars coming over the hill behind them is intimidating. The sidewalk at the intersection is on the East side of the street! Who would maintain, clean and protect this sidewalk? I know the answer, no one! A year from now it is just a grey, ugly and dirty area, ripe for spray cans. A truly abbreviated sidewalk from no -where, going no -where. I live about 150 yards south of 304th on the West side of the street. My neighbors across the street are totally impacted by your drawings. The three major homes facing West on 28th from the corner are having their yards carved up. The home at 30414 is going to lose half of their driveway and their only solution is to back out of their driveway onto a "blind" 28thstreet right hand lane. Their home value will plummet should they ever sell, as who would want that. The danger of an accident is just around the corner. An accident that one might say you caused, although inadvertently. Another home on 3041h, North side of the street has a driveway almost in the middle of intersection. That home today is vacant but getting in and out of that drive way with a back up of cars coming off of Military Road would make them a virtual prisoner in their car. The address on 304th is unavailable due to present renovation. However the house color is split, gray on top and reddish brick on the bottom. I used to sit on the board of equalization for the City of Renton. We could make binding, conditional use permits and building variances that a law might not allow. I used to visit ALL of the upcoming petitions before the meeting. There was nothing I could do better than to actually visit the sites. I wonder if all of the city agencies that have and can sign off, had EVER actually visited and looked at the projects involved as if it were their own. After I began this sojourn monthly, other board members did also and they thanked me for doing the obvious that was too obvious. Oh, in answering my own question, I know, they just don't have the time. You asked for brevity and I shall stop here unless you want more documentation. Or, isn't this enough? Isn't just one persons inconvenience worth the price of moving on? Your good intentions are NOT good enough. If you have personally visited the project, then your empathy should be for those left with your projects mistakes, home ownership devaluation and the right to enter either street as it is now, no longer will exist. When you have moved on and despite your traffic counts and technological beliefs, we who live here now are just fine within the status quo. I am leaving town for three weeks beginning December 1, 2014 to return just prior to Christmas. I would come to your meeting if it is open to the public and hasn't been pushed up prior to my return. I would guess that it is hard to delete a project that you have personally spent a lot of time putting together, but it beats force feeding people when they are not hungry. aly C..31111111 30445 28th Ave. South Federal Way, 98003 P.O. Box 6034 Federal Way, 98063 October 9, 2014 City of Federal Way Director of Community Development RE: Project - S. 304th Street/28th Ave. S. Intersection Improvements In response to your proposal, I would like to comment. I am a resident residing approximately four houses from S. 304th Street and 28th Ave S. I find it hard to understand your logic in this proposal. It does not make sense. The topography of 28th Ave S. in relationship to the homes would necessitate a complete regrading of that area in order to allow residents to drive into their property. The ability for us to approach our own driveways is difficult enough as it is due to the increase in traffic. The only thing a traffic signal would do would be to -great - more traffic backup. I can find no reason for redoing the S. 304th Street/28th Ave. S. intersection. 1 have never seen an accident at that 3-way stop. The only backup is caused by large trucks. As far as sidewalks are concerned, I have never heard of anyone being injured walking in this area where there is very little foot traffic. If we do have a problem it is the difficulty seeing people on skateboards. If you really want to do something of value for the community in this area, the sewer should be extended to properties on the east side of 28th Ave S. Water runoff from 28th Ave. S. should be redirected from the lake. The short notice given the public is unacceptable and action should not be taken without a public hearing. It would be a shame if residents have to ask for a court hearing. I am out of town at this time; I will review the project files when I return to Federal Way in mid October. You may contact me at 253- 941-r 480-,4%-1321. Box 6034730445 28th Federal Way, WA 98063 4CITY OF �, Federal Way November 21, 2014 Gary E. Smith PO Box 6034 Federal Way, WA 98063 RE: Response to Letter dated November 11, 2014 Dear Mr. Smith: CITY HALL 33325 8th Avenue South Federal Way, WA 98003-6325 (253) 835-7000 www.cityoffederalway.com The City received your letter dated November 11, 2014. It is apparent that you still have concerns regarding the upcoming construction project at the intersection of S304th St at 28th Ave S. Isaac Conlen, the City's Community Development Planning Manager, forwarded your letter to the Public Works Department so that we could properly respond. In your recent letter, you state that "you ignore and answer only the pertinent items that you personally wish to address". Please be assured, that was not our intent. Our previous response was intended to address your concerns. I have listed below all of the questions or concerns you have raised in your two letters to the City, along with our responses which serve to address or further clarify each of your specific items. "The topography of 28th Ave S in relationship to the homes would necessitate a complete regrading of that area in order to allow residents to drive onto their property." In regards to your concerns about the topography and access from driveways, the widening for the new northbound right turn lane will all occur on the east side of 28th Ave S. Construction of retaining walls along the east side of 28th Ave S will be needed to address the topography; however, access will not be restricted to any of the properties. We are coordinating with affected property owners. "The ability for us to approach our own driveways is difficult enough as it is due to the increase in traffic. The only thing a traffic signal would do would be to create more traffic backup." "The problem is this purported traffic signal will make egress and ingress from my property nearly impossible to imagine." The traffic analysis prepared for the design estimates that 28th Avenue S would have a queue from the traffic signal that would be less than 100 feet long in the northbound. This is roughly half that of the existing queue, and would fall short of your driveway. Southbound traffic would have larger gaps in traffic created by the traffic signal, since traffic leaving an all -way stop tends to have several gaps too small to be used to turn into the lane from a driveway. Based on this analysis, it appears that getting out of your driveway would be easier with the project than it is now. "Now, you are compounding the traffic with the advent of a traffic light necessity. You mentioned that the `study' and its results mandate a need for 28th and 304th to be controlled. Frankly, any child of 5 could tell you this will be a neighborhood tragedy. Excusing me as nonessential, you might realize that I live 4 houses South of 344th on 2 th e A detailed Traffic Analysis study was completed by this project by a licensed Professional Engineer (PE) who also has a certification as a Professional Traffic Operations Engineer (PTOE). The following are excerpts from the Traffic Analysis Report for the project that may provide additional clarification in explaining the need for the signal. As you will see below, the traffic volumes, rather than accidents or pedestrians, are the primary factor in warranting the need for a signal at this intersection. According to Washington State statute, justification for a new signal is met if the proposed location satisfies at least one of the minimum traffic operational warrants delineated within the FHWA/USDOT's `Manual of Uniform Traffic Control Devices for Streets and Highways, 2010 Edition (MUTCD) ... Washington State, by statute, has adopted the signal warrants delineated within the MUTCD. However, as an accepted condition of installation, a traffic signal must improve the overall safety and/or improve operational efficiency of the intersection. Therefore, satisfying one or more of the signal warrants alone does not in itself substantiate the need or justification for a traffic signal. Consideration of a traffic signal requires a thorough analysis that takes into account other variables such as accident history, field conditions including sight distances and speed limits, and good engineering judgment. In addition to the signal warrants, these considerations must be analyzed before the installation of a traffic signal is proposed. This analysis studied eight signal warrants listed in the 2010 MUTCD as follows: Warrant 1: Eight -Hour Vehicular Volume Warrant 2: Four -Hour Vehicular Volume Warrant 3: Peak Hour Warrant 4: Pedestrian Volume Warrant 5: School Crossing Warrant 6: Coordinated Signal System Warrant 7: Crash Experience Warrant 8: Roadway Network Per the Signal Warrant Analysis, the intersection meets three warrants: Warrant 1, 2, and 8. Warrant 8, Roadway Network warrant shall be considered only if the intersection has two or more major routes. The S304th Street is classified as a principal collector, and is not a major route. So, the Warrant 8 doesn't apply to the intersection. The S304th Street and 28th Ave S intersection meets the following warrants: Warrant 1: Eight -Hour Vehicular Volume Warrant 2: Four -Hour Vehicular Volume The intersection is only 400 feet west of the Military Road S and S304th Street intersection. The eastbound queue from the Military Road S signal may spill back into the intersection, and would impeded the traffic operations. Therefore, a signal is warranted and recommended at the intersection of S304th Street and 28th Avenue S. "The only backup is caused by large trucks." Trucks make up about 1 % of the volume through the intersection, and thus are not a large factor in queues from the intersection. The backups are created by the volume all vehicles being stopped, particularly on westbound S 3041" Street turning left onto southbound 281" Avenue S, which regularly backs up longer than the left -turn lane, thus blocking westbound through traffic. Occasionally, this backup reaches Military Road S. The backup is caused by the inefficiency of all -way stop controlled intersections at higher volumes. If there were no trucks at all, we would still have these backups. "I have never seen an accident at that 3-way stop." "It is interesting to note, that you have a 3 street project because 28t" ends at 304t". It is also noticeable that you did not give me any accident or injury statistics for that area. I have lived here for 8 years and have NEVER even seen or heard of one, whether it is via automobile or pedestrian. Know why? Because there happens to be none!" Traffic data for three years prior to the start of the project design was analyzed. This covered the time period of 2010-2012. The following is an excerpt from the Traffic Analysis Report for this project which specifically addresses the accident history at the intersection. Historical accident data at the intersection of S304th Street and 28r" Ave S was collected and evaluated for the purpose of identifying potential safety problems or concerns that may exist. The City of Federal Way provided a history of all reported accidents in the vicinity of the intersection of S304th Street and 28t" Ave S for the past three years (2010-2012). There were a total of five accidents at the intersection. All of the five accidents were property damage only (PDO), with no personal injury or fatality accidents during this recorded period. Out of the five accidents, one accident might have been corrected by the installation of the signal. The accident is a Right Angle type accident. It happened on 1211812011 between one vehicle going from west to east and the other vehicle traveling from south to west. The detail situation and reasons are not available. The installation of traffic signal will clearly assign the right of entry and my, correct this accident. Two accidents involved a parked vehicle. The other two accidents are sideswipe type and involved two vehicles on the same direction of travel. It is acknowledged that there are very few accidents recorded at this intersection. However, as noted previously, the accident collision rate is not the impetus for this project. "As far as sidewalks are concerned, I have never heard of anyone being injured walking in this area where there is very little foot traffic. If we do have a problem it is the difficulty seeing people on skateboards." Again, accident history is not the primary reason that this signal is being installed. The sidewalks are being added in the areas of widening to comply with the City's Comprehensive Plan. Note that the full build -out of the ultimate street sections per the Comprehensive Plan are not occurring at this time (i.e. no widening on the west side of 28t" Ave S); however, the portion of the intersection that is impacted by the widening will be constructed to meet the planned sections as much as possible. The City's Comprehensive Plan identifies S304th St as a Principal Collector and 28th Ave S as a Minor Arterial. The planned street section for 28th Ave S is "Section K" which is three lanes, bike lanes, planter strips, and sidewalks. S304th St is planned "Section M" (3 lanes, planter strips, and sidewalks) west of the intersection and "Section K" east of the intersection. The comprehensive plan also identifies 28th Ave S and the section of S340th St from 28th Ave S to Military Rd S as a Class 2 Bicycle Facility which indicates marked bike lanes. "If you really want to do something of value for the community in this area, the sewer should be extended to properties on the east side of 28th Ave S." "You make my address to expenditures for nonessential use vs. essential use (sewers) seem foolish when it was but a suggestion for better use of tax payer dollars." As City employees, we understand the importance of stretching our tax payer dollars and investing in essential projects. However, the City of Federal Way does not operate the sewer or water facilities within our city limits. These are managed by Lakehaven Utility District. This utility district is a completely separate entity from the City that operates with its own budget, funding sources, and has their own plans for capital projects. We have heard from several residents that they would appreciate a sewer extension in this area. As this is not within the jurisdiction of the city, your concerns regarding the sewer should be directed to Lakehaven Utility District. "Water runoff from 28th Ave S should be redirected from the lake." There are strict environmental and storm drainage regulations that must be adhered to both by private developers and also the City when proposed road improvement projects are constructed. Storm water flows to Steel Lake under the present day conditions. To redirect all existing flows from the lake would be extensive and is beyond the scope of this project. The amount of new impervious surfaces being added by the intersection project does not trigger the need for a stormwater flow control facility. Due to the City's desire to use low impact development (LID) and natural drainage practices on this project as much as possible, the City is electing to install pervious concrete sidewalks. Furthermore, although the regulations do not require water quality treatment, the City has elected to install a facility within the project area. Due to the City's strict adherence to stormwater guidelines, as well as our elective improvements, we do not anticipate any negative impacts to the lake. "The short notice given the public is unacceptable and action should not be taken without a public hearing." "I would like to have this put forward in a public forum. I was on the road during your 3 week notice, it is too short a period for public input. You have known about this project. Probably for a year." The notice period you are referring to was for the SEPA Notice of Application. This is an environmental review process that the project is subject to. The duration of the required comment period is established by code and a public hearing was not required. In regards to notification regarding the project in general, a letter was sent to all properties within 150' feet of the proposed improvements (approximately two to three parcels past the project) in the Fall of 2013. Your property is located just outside of the area of properties that were notified. This project has been on the City's Transportation Improvement Plan for over a decade. Additionally it was presented to the City Council's Land Use and Transportation Committee and to the entire City Council in July 2014 upon completion of the 30% design for the project. The agendas for these meetings are published in advance on the City's website and these meetings are open to the public. The public is welcome to present any comments or feedback on these projects at any of these public meetings. "Tell me of one person, who I can talk to whose imagination is in reality so I can contest your notion that this IS a necessary expense and not just a "make work project". We hope that the answers above have helped to reassure you of the need for this project. If you have further questions, please feel free to contact us. We would also be happy to sit down with you in person to discuss the project. Sincerely, Rick Perez, P.E. City Traffic Engineer rick. perez�a7cityoffedera lway. com 253.835.2740 ChriAftr,w, Christine Mullen, P.E. City Project Manager christine.muIle n cit offederalwa .corn 253.835.2723 CC: Marwan Salloum, PE — City of FW Public Works Director John Mulkey, PE — City of FW Interim Street Systems Manager Isaac Conlen — City of FW Planning Manager Stacey Welsh — City of FW Senior Planner Day File Project File NOV 13 Z014 City of Federal Way CITY OF FEDERAL WAY CDS 33325 91h Avenue South November 11, 2014 Federal Way, Washington 98003 Mr. Issac Conlen Planning Manager Dear Sir. I find your answer to my letter to be a gross indifference to the real problem. You ignore and answer only the pertinent items that you personally wish to address. You make my address to expenditures for nonessential use vs. essential use (sewers) seem foolish when it was but a suggestion for better use of tax payer dollars. There are more projects in need that are not in your arena. The problem is that this purported traffic signal will make egress and ingress from my property nearly impossible to imagine. As I mentioned, the 317th roundabout turned 281h into a big enough mess. As the years go by, I am sure that those who instituted the freeway addition, should they live where I live, would have found it to be a neighborhood nightmare. Now, you are compounding the traffic with the advent of a traffic light necessity. You mentioned that the "study" and its results mandate a need for 28th and 304th to be controlled. Frankly, any child of 5 could tell you that this will be a neighborhood tragedy. Excusing me as nonessential, you might realize that I live 4 houses South of 3041h on 28th. It is interesting to note, that you have a 3 street project because 28th ends at 304th. It is also noticeable that you did not give me any accident or injury statistics for that area. I have lived here for 8 years and have NEVER even seen or heard of one, whether it is via automobile or pedestrian. Know why? Because there happens to be none! Tell me of one person, who I can talk to whose imagination is in reality so I can contest your notion that this IS a n ary expeFe and not just a "make work project". I would like to have this put forward in a public r I was o . road during your 3 week notice, it is too short a period for public input. You hav wn,49out isje . Pro ly for a year. /L/ 6 � � �. , ry E. Smith 30445 28th Ave. South Federal Way, Washington 98003 Mailing; P.O. Box 6034, Federal Way, Washington 98063. CITY OF Federal Way DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT 33325 8th Avenue South Federal Way WA 98003 253-835-7000; Fax 253-835-2609 www.cit offederalwa .corn DECLARATION OF DISTRIBUTION 1�� —I hereby declare, under penalty of perjury of the laws of the State of Washington, that a: ❑ Notice of Land Use Application/Action ❑ Notice of Determination of Significance (DS) and Scoping Notice Environmental Determination of Nonsignificance (SEPA, DNS) ❑ Notice of Mitigated Environmental Determination of Nonsignificance (SEPA, MDNS) ❑ Notice of Land Use Application & Optional DNS/MDNS ❑ FWRC Interpretatbn ❑ Other ❑ Land Use Decision Letter ❑ Notice of Public Hearing before the Hearing Examiner ❑ Notice of Planning Commission Public Hearing ❑ Notice of LUTC/CC Public Hearing ❑ Notice of Application for Shoreline Management Permit ❑ Shoreline Management Permit ❑ Adoption of Existing Environmental Document was Xmailed ❑ faxed ge-mailed and/or ❑ posted to or at each of the attached addresses on C, j (?, ,2014. F. Project Name File Number(s) Signature Date 1 -8 -/ V K:\CD Administration Files\Declaration of Distribution.doc/Last printed 1 /22/2014 2:40:00 PM Tamara Fix From: Tamara Fix Sent: Thursday, November 13, 2014 8:22 AM To: sepaunit@ecy.wa.gov' Cc: 'Brian Asbury'; Gordon Goodsell;'bra ndon.reynon@puyalluptribe.com'; 'laura.murphy@muckleshoot.nsn.us'; Stacey Welsh Subject: S 304th St/28th Ave S Intersection Improvements DNS Attachments: 20141113081506.pdf Attached is the DNS for the above -mentioned project. This was issued on November 13, 2014, and the Senior Planner for the project is Stacey Welsh, 253-835-2634, stacv.welsh _ cityoffederalway.com. Cite U J edenzi lVay Gamarca 'x0cit o gdera6%,al.com "When life gives you a hundred reasons to cry, show life that you have a thousand reasons to smile." Unknown CITY OF Federal Way November 5, 2014 Gary Smith PO Box 6034 Federal Way, WA 98063 RE: File.#144 556-00-��;$�T TITIO -OF-DtTKMI RNATION a� S. 3041h Street/281h Ave S. Intersection Improvements Project CITY OF Federal Way November 5, 2014 LFederal er Avenue South ay, WA 98003 File #14-104556-00-SE; RETENTION OF DETERMINATION OF P S. 3041h Street/28th Ave S. Intersection Improvements Project Dear Ms. Fu CITY HALL 33325 8th Avenue South Federal Way, WA 98003-6325 (253) 835-7000 www. cityoffederalway.. com (DNS) FILE CITY HALL 33325 8th Avenue South Federal Way, WA 98003-6325 (253) 835-7000 www.cityoffederalway.com This letter is to notify y that the Community Development Depa ent and Public Works Streets Division staff have reviewe ur comment letter received on tober 7, 2014, regarding the S. 304th Street/28th Ave S. Intersection Im ovements Project. The partment will retain the .State Environmental Policy Act (SEPA) threshold determin n of a Dete ation of Non -Significance (DNS) as the proposal is not anticipated to cause signific adve e environmental impacts that would require preparation of an Environmental Impact Statem (EIS). The DNS is not a land use decision or a permit to authorize construction; it is a determinati - that a IS is not required. Your letter contained some specific a Berns regarding possi impacts to your property. The widening of the street to accommodate then rthbound right turn lane will a • ccur on the east side of 28th Ave S and should not impact your p,a�ce'l. There should be no impacts to the h erhead area where you park; no relocation of the utilityfpbles on the west side of 28th Ave S; and no rely 'on of your mailbox. We appreciate your questions about the project and want to assure you that if there re any planned impacts to your property, thAt v} e would discuss them with you in advance of construction. If you have arty questions regarding this letter or the Use Process III or Shoreline Substanti Development Permit land use applications, please contact Stacey Welsh, Senior Planner, at 2 "a5-2634 or stace .wels110 i offederalwa .com. If you have questions regarding the street improvement pr 'ect, lease contact Christine Mullen, Street Systems Project Engineer, at 253-835..-2723 or re RECEIVED O C T 0 7 2014 PUBLIC WORKS DEPARTMENT -7 0 174 / / pce � V�74 - 3� �-� • �, .-�7.- �"v � I �-W� �''—�c.C-��'�.�G�L� _ ._ .ice � t �� f� ��fyc.��c��—�5�� []� tit.. L—� � � �.:..c� f�" �� — .� ��-� � i� �c�- -- i �. �� r �� October 9, 2014 City of Federal Way 'Rtk— Director of Community Development RECEIVED OCT 212014 PUBLIC WORKS DEPARTMENT RE: Project - S. 304th Street/28th Ave. S. Intersection Improvements In response to your proposal, I would like to comment. I am a resident residing approximately four houses from S. 304th Street and 28th Ave S. I find it hard to understand your logic in this proposal. It does not make sense. The topography of 28th Ave S. in relationship to the homes would necessitate a complete regrading of that area in order to allow residents to drive onto their property. The ability for us to approach our own driveways is difficult enough as it is due to the increase in traffic. The only thing a traffic signal would do would be to create more traffic backup. I can find no reason for redoing the S. 304th Street/28th Ave. S. intersection. I have never seen an accident at that 3-way stop. The only backup is caused by large trucks. As far as sidewalks are concerned, I have never heard of anyone being injured walking in this area where there is very little foot traffic. If we do have a problem it is the difficulty seeing people on skateboards. If you really want to do something of value for the community in this area, the sewer should be extended to properties on the east side of 28th Ave S. Water runoff from 28th Ave. S. should be redirected from the lake. The short notice given the public is unacceptable and action should not be taken without a public hearing. It would be a shame if residents have to ask for a court hearing. I am out of town at this time; I will review the projectfitq when I return to Federal Way in mid October. You may contact me at 253- 941-35�0-4qA-1 6034 / 30445 28th Ave. S. Federal Way, WA 98063 sy =^'a F i L �y CITY OF Federal Way NOTICE OF MASTER LAND USE APPLICATION AND OPTIONAL DETERMINATION OF NONSIGNIFICANCE (DNS) Project Name: S. 3041h Street/28th Ave. S. Intersection Improvements Project Description: The proposal consists of installing a traffic signal, street lights and constructing a northbound right turn lane at the intersection of 28ch Ave. S. and S. 304th St. The northbound turn lane will require roadway widening, including right-of-way L i �. L1,.- acquisition on up to 3 parcels, and a Shoreline Permit since the widening occurs within 200 ft. of Steel Lake. Proposed improvements include: installing curb, gutter, and sidewalk at the southeast corner of the intersection; a retaining wall to mitigate impacts to private property on the east side of 281h Ave. S; improving the existing stormwater system (including adding treatment where none currently exists); incorporating low impact development and natural -. practices to the maximum extent possible; utility d I �] vault and pole relocations and/or adjustments; and J _ J I access revisions (driveways) to private properties. - ; =i -' - Applicant: Christine Mullen, City of Federal Way Public Works, 33325 8th Avenue South, Federal Way, WA 98003 Project Location: S. 304th Street/28th Ave. S. Intersection, Federal Way Date Application Received: August 28, 2014 Date Determined Complete: September 25, 2014 Date of Notice of Application: October 3, 2014 Comment Due Date: October 20, 2014 Environmental Review: Based upon review of a completed environmental checklist and other information on file with the City, it is likely that the City of Federal Way will determine that the project will not have a probable significant adverse impact on the environment and expects to issue a Determination of Nonsignificance (DNS) for this project. The optional DNS process in WAC 197-11-355 is being used. This may be your only opportunity to comment on the environmental impacts of the proposed project. The proposal may include mitigation measures under applicable codes, and the review process may incorporate or require mitigation measures regardless of whether an environmental impact statement (EIS) is prepared. A copy of the subsequent threshold determination for the specific proposal may be obtained upon request. Agencies, tribes, and the public are encouraged to review and comment on the proposed project and its probable environmental impacts. Comments must be submitted by the date noted above. Permits/Files Under Review: Use Process III (File #14-10455 1 -UP), Shoreline Substantial Development Permit (File #14-104557-SH), and State Environmental Policy Act Threshold Determination (File #14- 104556-SE). Environmental Documents & Required Studies: Environmental Checklist and Geotechnical Report. Development Regulations Used for Project Mitigation: Federal Way Revised Code Title 14, `Environmental Policy;' Title 15 `Shoreline Management;' Title 16 `Surface Water Management;' and Title 19 `Zoning and Development Code.' Public Comment & Appeals: Any person may submit written comments regarding the land use application or the environmental impacts of the proposal to the Director of Community Development by 5:00 p.m. on October 20, 2014.Only persons who submit written comments to the Director (address below) or specifically request a copy of the decision, may appeal the decision. However, any interested party may appeal the environmental threshold determination. Issuance of Final Environmental Determination: The final DNS may be issued without a second comment period, unless timely comments identify probable significant adverse impacts that were not considered by the Notice of Optional DNS. A copy of the DNS may be obtained upon request. Availability of File: The official project files, existing environmental documents and required studies are available for public review at the Department of Community Development, 33325 8`h Avenue South, Federal Way, WA 98003. Staff Contact: Stacey Welsh — Associate Planner, 253-835-2634 DEPARTMENT OF COMMUNITY DEVELOPMENT 33325 8th Avenue South Federal Way WA 98003-6325 CITY ®� 253-835-7000; Fax 253-835-2609 www,cityoffederolway.carrZ Federal Way DECLARATION OF DISTRIBUTION 1, Colon Thomas laws of the State of Washington, that a: ❑ Notice of Land Use Application/Action ❑ Notice of Determination of Significance (DS) and Scoping Notice ❑ Notice of Environmental Determination of Nonsignificance (SEPA, DNS) ❑ Notice of Mitigated Environmental Determination of Nonsignificance (SEPA, MDNS) O Notice of Land Use Application & Optional DNS/MDNS ❑ FWRC Interpretation ❑ Other hereby declare, under penalty of perjury of the ❑ Land Use Decision Letter ❑ Notice of Public Hearing before the Hearing Examiner ❑ Notice of Planning Commission Public Hearing ❑ Notice of LUTC/CC Public Hearing ❑ Notice of Application for Shoreline Management Permit ❑ Shoreline Management Permit ❑ Adoption of Existing Environmental Document was ❑ mailed ❑ faxed ❑ e-mailed and/or ■ posted to or at each of the attached addresses on October 3 2014. Project Name S. 304th Street/28th Ave. S. Intersection Im rovements File Number(s) 14-104551-00-UP 14-104557-00—SH. 14-104556-00-SE Signature Date `� 31I Posting Sites: Federal Way City Hall - 33325 8th Avenue Federal Way Regional Library - 34200 1 st Way South Federal Way 320th Branch Library - 848 South 320th Street Subject Site - S. 304th Street/28th Ave. S. Intersection CITY OF 'A Federal Way NOTICE OF MASTER LAND USE APPLICATION AND OPTIONAL DETERMINATION OF NONSIGNIFICANCE (DNS) Project Name: S. 3041h Street/281h Ave. S. Intersection Improvements Project Description: The proposal consists of installing a traffic signal, street lights and constructing a northbound right turn lane at the intersection of 28th Ave. S. and S. 3:041h St. The northbound turn lane will require roadway widening, including right-of-way L_i' acquisition on up to 3 parcels, and a Shoreline PermitL,.r since the widening occurs within 200 ft. of Steel Lake. Proposed improvements include: installing curb, gutter, and sidewalk at the southeast corner of the intersection; a retaining wall to mitigate impacts C to private property on the east side of 281h Ave. S; �� , f'V _-1 C i� improving the existing stormwater system (including �-,!� ,1 adding treatment where none currently exists); incorporating low impact development and natural practices to the maximum extent possible; utility vault and pole relocations and/or adjustments; and j z E , access revisions(driveways) to private properties. J Applicant: Christine Mullen, City of Federal Way Public Works, 33325 8th Avenue South, Federal Way, WA 98003 Project Location: S. 304th Street/28"' Ave. S. Intersection, Federal Way Date Application Received: August 28, 2014 Date Determined Complete: September 25, 2014 Date of Notice of Application: October 3, 2014 Comment Due Date: October 20, 2014 Environmental Review: Based upon review of a completed environmental checklist and other information on file with the City, it is likely that the City of Federal Way will determine that the project will not have a probable significant adverse impact on the environment and expects to issue a Determination of Nonsignificance (DNS) for this project. The optional DNS process in WAC 197-11-355 is being used. This may be your only opportunity to comment on the environmental impacts of the proposed project. The proposal may include mitigation measures under applicable codes, and the review process may incorporate or require mitigation measures regardless of whether an environmental impact statement (EIS) is prepared. A copy of the subsequent threshold determination for the specific proposal may be obtained upon request. Agencies, tribes, and the public are encouraged to review and comment on the proposed project and its probable environmental impacts. Comments must be submitted by the date noted above. Permits/Files Under Review: Use Process III (File #14-104551-UP), Shoreline Substantial Development Permit (File #14-104557-SH), and State Environmental Policy Act Threshold Determination (File #14- 104556-SE). Environmental Documents & Required Studies: Environmental Checklist and Geotechnical Report. Development Regulations Used for Project Mitigation: Federal Way Revised Code Title 14, `Environmental Policy;' Title 15 `Shoreline Management;' Title 16 `Surface Water Management;' and Title 19 `Zoning and Development Code.' Public Comment & Appeals: Any person may submit written comments regarding the land use application or the environmental impacts of the proposal to the Director of Community Development by 5:00 p.m. on October 20, 2014.Only persons who submit written comments to the Director (address below) or specifically request a copy of the decision, may appeal the decision. However, any interested party may appeal the environmental threshold determination. Issuance of Final Environmental Determination: The final DNS may be issued without a second comment period, unless timely comments identify probable significant adverse impacts that were not considered by the Notice of Optional DNS. A copy of the DNS may be obtained upon request. Availability of File: The official project files, existing environmental documents and required studies are available for public review at the Department of Community Development, 33325 81h Avenue South, Federal Way, WA 98003. Staff Contact: Stacey Welsh —Associate Planner, 253-835-2634 CITY OF Federal Way DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT 33325 8th Avenue South Federal Way WA 98003 253-835-7000; Fax 253-835-2609 www.cityoffederalwoy.com DECLARATION OF DISTRIBUTION I, �� } hereby declare, under penalty of perjury of the laws of the State of Washington, that a: ❑ Notice of Land Use Application/Action ❑ Notice of Determination of Significance (DS) and Scoping Notice ❑ Notice of Environmental Determination of Nonsignificance (SEPA, DNS) ❑ Notice of Mitigated Environmental Determination of Nonsignificance (SEPA, MDNS) Notice of Land Use Application & Optional DNS/MDNS ❑ FWRC Interpretation ❑ Other ❑ Land Use Decision Letter ❑ Notice of Public Hearing before the Hearing Examiner ❑ Notice of Planning Commission Public Hearing ❑ Notice of LUTC/CC Public Hearing ❑ Notice of Application for Shoreline Management Permit ❑ Shoreline Management Pemnit ❑ Adoption of Existing Environmental Document was Xmailed ❑ faxed Ae mailed and/or ❑ posted to or at each of the attached addresses on 0 r" . 2014. Project Name File Number(s) . 19 - % Q Y 'G�- q 1 Signature Date —A) - �`) �f K:\CD Administration Fles\Declaration of Distribution.doc/Last printed 1/22/2014 2:40:00 PM 446, Nl— CITY OF Federal Way NOTICE OF MASTER LAND USE APPLICATION AND OPTIONAL DETERMINATION OF NONSIGNIFICANCE (DNS) Project Name: S. 304th Street/28'h Ave. S. Intersection Improvements Project Description: The proposal consists of installing a traffic signal, street lights and constructing a northbound right turn lane at the intersection of 28=h Ave. S. and S. 300, St. The northbound turn lane will require roadway widening, including right-of-way F_ i , ;` �� _V"J_ acquisition on up to 3 parcels, and a Shoreline Permit since the widening occurs within 200 ft. of Steel 3 .: Lake. Proposed improvements include: installing curb, gutter, and sidewalk at the southeast corner of the 'intersection; a retaining wall to mitigate impacts I IF', r. r to private property on the east side of 28`h Ave. S; �� = improving the existing stormwater system (including adding treatment where none currently exists); - incorporating low impact development and natural _- `_ practices to the maximum extent possible; utility Ali t -; ' vault and pole relocations and/or adjustments; and �� 1 ! access revisions (driveways) to private properties. _ 1 ( Y) P P P Applicant: Christine Mullen, City of Federal Way Public Works, 33325 8`' Avenue South, Federal Way, WA 98003 Project Location: S. 304'h Street/28'h Ave. S. Intersection, Federal Way Date Application Received: August 28, 2014 Date Determined Complete: September 25, 2014 Date of Notice of Application: October 3, 2014 Comment Due Date: October 20, 2014 Environmental Review: Based upon review of a completed environmental checklist and other information on file with the City, it is likely that the City of Federal Way will determine that the project will not have a probable significant adverse impact on the environment and expects to issue a Determination ofNonsignificance (DNS) for this project. The optional DNS process in WAC 197-11-355 is being used. This may be your only opportunity to comment on the environmental impacts of the proposed project. The proposal may include mitigation measures under applicable codes, and the review process may incorporate or require mitigation measures regardless of whether an environmental impact statement (EIS) is prepared. A copy of the subsequent threshold determination for the specific proposal may be obtained upon request. Agencies, tribes, and the public are encouraged to review and comment on the proposed project and its probable environmental impacts. Comments must be submitted by the date noted above. Permits/Files Under Review: Use Process III (File #14-104551-UP), Shoreline Substantial Development Permit (File #14-104557-SH), and State Environmental Policy Act Threshold Determination (File #14- 104556-SE). Environmental Documents & Required Studies: Environmental Checklist and Geotechnical Report. Development Regulations Used for Project Mitigation: Federal Way Revised Code Title 14, `Environmental Policy;' Title 15 `Shoreline Management;' Title 16 `Surface Water Management;' and Title 19 `Zoning and Development Code.' Public Comment & Appeals: Any person may submit written comments regarding the land use application or the environmental impacts of the proposal to the Director of Community Development by 5:00 p.m. on October 20, 2014.Only persons who submit written comments to the Director (address below) or specifically request a copy of the decision, may appeal the decision. However, any interested party may appeal the environmental threshold determination. Issuance of Final Environmental Determination: The final DNS may be issued without a second comment period, unless timely comments identify probable significant adverse impacts that were not considered by the Notice of Optional DNS. A copy of the DNS may be obtained upon request. Availability of File: The official project files, existing environmental documents and required studies are available for public review at the Department of Community Development, 33325 8ffi Avenue South, Federal Way, WA 98003. Staff Contact: Stacey Welsh —Associate Planner, 253-835-2634 City of ,300' Notification Area , Jr Map Date: July,2014 City of Federal Way Gis Division 33325 I Ave Federal WayS 304th @ 28th Ave S (206)- 35-70. Federal Way Wa. 98003 (206) - 835 - 7000 www.cityoffederalway.com 0. 365500- 0100. _ 365500 798480-0200 79848"120.g°' 19 10 798380-0 �6 "�••?',-:J ��i� v-7S8380�0010 798380-0110 - 042104-9147 4 009° S 302ND °^ 380-0190 � 3655i70.0080 798480-0190 ST c' m .. N 987 m 40 % 8a- 1.?0 .' g n �96380-0180 365500-0070 798480-0180 A, U , 8 83800730 798480-0080 m g o 365500-0060 I— — - 196360-017° a n 798480-0170 798480-0070 / '98380O1g0 N � 3655000050 I�J8480-0760 ►� �� m eF o a S 303RD � �� 798380-0300 _ F•• 3&5�000040 ST ` 1? o S � 7ssasn.n29p. 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HISTORIC PRESERVATION PO BOX 48343 Q4YMPIA WA 98504-8343 ❑re n.kaehler5daho.wa.( LAURA ARBER (saltwater) WDFW REGION 4 OFFICE 16018 MILL CREEK BLVD MILL CREEK WA 98012-1296 laura.arber dfw.wa. ov KRIEDT I G COUNTY TRANSITDIV NV PLANNING MS KSC- R-0431 )1 S JACKSON ST I EATTLE WA 98104-3856 ENVIRONMENTAL DEPT PO BOX 1837 TACOMA WA 98401-1837 iiorda n (cr'portoftacoma.com, smauermann ❑rtoftacoma.com KING COUNTY PARKS & REC 201 S JACKSON ST # 700 SEATTLE WA 98104 kath .n and kin count . ov ,ING CO ROADS DIVISI( ,OUNTY ROADS ENGIN 55 MONROE AVE NE ,ENTON WA 98056 ov PAUL ROGERS NATURAL RESOURCES CVN SVC 935 POWELL AVE SW RENTON WA 98055 pau I. rogers@wa. usda.gov MARSHA ENGEL PUGET SOUND PARTNERSHIP 21011 TH AVE SW STE 401 OLYMPIA WA 98504-0900 marsha.enqel@psp-.wa.gov REVIEW TEAM WA DEPT OF COMMERCE GROWTH MGT SERVICES PO BOX 42525 OLYMPIA WA 98504-2525 JAMEY TAYLOR DNR SEPA CENTER PO BOX 47015 OLYMPIA WA 98504- 808 ZEIGLER DEPT OF FISH AND WII PO BOX 43200 OLYMPIA, WA 98504-31 ENERGY FACILITY SITE EVALUATION COUNCIL 1300 EVERGREEN PARK DRIVE PO BOX 43172 OLYMPIA, WA 98504-3172 efsecP,utc.wa c�ov DEPT OF SOCIAL & HEALTH SVCS LANDS AND BUILDING DIVISION PO BOX 45848 OLYMPIA, WA 98504 hubenbiCci].dshs.wa. oq_v PARKS & RECREATION COMMISSIC PO BOX 42650 OLYMPIA WA 9 8504-2650 rand .kline arks.wa. ov WA NATURAL HERITAGE DNR PO BOX 47014 15 OLYMPIA WA 98504-7014 sepacenter cDdnr.wa.gov FE WASH STATE PARKS AND REC PO BOX 42668 OLYMPIA WA 98504-2668 randy.kline@parks.wa..gov L•ARRY FISHER (Freshwater}\ / WDFW AREA HABITAT BIOL 1775 12T" AVE NW STE 201 ISSAQUAH WA 98027 lar .fisher dfw.wa. ov KELLY COOPER DEPT OF HEALTH ENVIRON HEALTH DIV PO BOX 47820 OLYMPIA WA 98504-7820 kelly.cooper(a)doh.wa. ao_v PORT OF SEATTLE--airport PO BOX 1209 SEATTLE WA 98111 rybo It. s(g) portseattle. org MASTER BUILDERS ASSOC GIST 335 116T" AVE SE BELLEVUE WA 98004-6407 AWilford MBAKS-corn C SEPA REVIEWSOUND CLEAN AIR AGENCY RD AVE STE 105LE WA 98101-3317 s�leanair.or 5RANDON REYNON PUYALLUP TRIBE OF INDIAN HISTORIC PRESERVATION DE 3009 E PORTLAND AVE TACOMA WA 98404 T,ANYA NASCIMENTO W PUBLIC SCHOOLS 31405 18T" AVE S FEDERAL WAY WA 98003 PSRC GROWTH MANAGEMENT DEPT 1011 WESTERN AVE #500 SEATTLE WA 98104-1040 imiller psre.org �AL"!•RA MURPHY TRIBAL ARCHAEOLOGIS MUCKLESHOOT INDIAN TR BE 39015 172ND AVE SE i AUBURN WA 98092 f /BRIAN ASBURY LAKEHAVEN UTILITY DIS L PO BOX 4249 FEDERAL WAY WA 98063 sbu iakehaven.or REGGIE HOLMES KC BOUNDARY REVIEW BOARD YESLER BUILDING, RM 240 400 YESLER WAY SEATTLE WA 98104� re inald.holmes kin count . ov SOLID WASTE DIV KING CO DEPT OF NATURAL RES 201 S JACKSON ST STE 701 SEATTLE WA 98104-3855 kevin.kiernan�a7kin count .qQv I LARRY FAY PUBLIC HEALTH SEATTLE/Klt�G 401 FIFTH AVE STE 1100 SEATTLE WA 98104 I S KING FIRE & RESCU 1617 1ST AVE S �' D-- FEDERAL WAY WA 98003 �hris.ingham @south ki ngfire- orct FW CHAMBER OF COMMERCE PO BOX 3440 FEDERAL WAY WA 98063 pmullen .federalwaychamber-com CITY OF AUBURN 25 W MAIN ST AUBURN WA 98001 ksn der ci.auburn.wa.us RON HOWARD PIERCE COUNTY HEALTH DEPT PIERCE CO PLNG & LAND SVCS CITY OF TACOMA ENVIRONMENTAL HEALTH DIV 2401 S 35T" ST 747 MARKET ST STE 345 3629 S "D" ST TACOMA WA 98409-7460 TACOMA WA 98402-3769 TACOMA WA 98408 aclark co. Piercema. us shirley.schultz ci.tacoma.wa.us rohoward chd_or HAYES ALEXANDER PLNG CHAIR KENT CITY HALL CITY OF EDGEWOOD NORTHEAST TACOMA PLANNING DEPT TH 2224 104 AVE E NEIGHBORHOOD COUNCIL 220 4T" AVE S EDGEWOOD WA 98372-1513 5308 RIDGE DR NE KENT WA 98032 cit0allgeitmofedgewood.org TACOMA WA 98422 bwolters kentwa. ov ha eslQ nventure.com CITY OF SEATAC BEN CAN CITY OF BURIEN 4800 S 188T" ST PIERCE TRANSIT � 99070 TH 415 SW 150 ST SEATAC WA 98188 PO BOX LAKEWOOD WA 98499-0070 BURIEN WA 98166-1957 dod a ci_seatac.wa.us an iercetransit.or �l chipd(a7burienwa.qoy TERRY LUKENS HIGHLINE WATER DISTRICT MIDWAY SEWER DISTRICT BELLEVUE COUNCIL OFFICE 23828 301h Ave S PO BOX 3487 PO BOX 90012 KENT WA 98032 KENT WA 98032 BELLEVUE WA 98009-9012 mfossos hi hlinewater.or kenCa7midwaysewer.orq council bellevuewa- ov SAM PACE LEAGUE OF WOMEN VOTERS ATTN NEWSROOM SEA/KING CO ASSOC/REALTORS OF SOUTH KING COUNTY TACOMA NEWS TRIBUNE 29839 154T" AVE SE PO BOX 66037 1950 S STATE ST KENT WA 98042-4557 BURIEN WA 98166 TACOMA WA 98405 sampaceQconcentric. net !nfo(d-)seattlelwv.orq riewstipsCcDthenewstribune.com KRISTI KYLE FEMA EPA PSE REGIONAL STRUCTURE REGION 10 NTH DIV ENVIRONMENTAL REVIEW SEC PO BOX 97034 130 228T" ST SW 1200 6TH AVE MD-126 BELLEVUE WA 98009-9734 BOTHELL WA 98021-9796 SEATTLE WA 9MD- Kristina.k e.com \ 425 487-4600 KC WASTEWATER TREATMENT PE' RRY WEINBERG SOUND TRANSIT US FISH & WILDLIFE SERVCE ENVIRONMENTAL PLN OAP 510 DESMOND DR SE #102 MS KSC-NR-0505 401 S JACKSON ST ��EATTLE LACEY WA 98503 201 S JACKSON ST WA 98104-282 �_ SEATTLE WA 98104-3855 KC DEPT OF ASSESSMENTS FEDERAL WAY MIRROR FEDERAL WAY NEWS 500 4T" AVE RM 700 31919 1 ST AVE S STE 101 14006 1 ST AVE S STE B #ADM-AS-0708 FEDERAL WAY WA 98003 BURIEN WA 98168 SEATTLE WA 98104 LAND US SVC KCDDES 35030 SE DOUGLAS ST, #210 SNOQUALMIE, WA 98065 MUCKLESHOOT INDIAN TRIBE FISHERIES DIVISION ENVIRONMENTAL REVIEWER 39015 172ND AVE SE UBURN WA 98092 RYAN FLYNN TACOMA WATER DIVISION PO BOX 11007 TACOMA WA 98411 CITY CLERK PACIFIC CITY HALL 100 THIRD AVE SE PACIFIC WA 98047 CITY OF LAKEWOOD 10510 GRAVELLY LK DR SW STE 206 LAKEWOOD WA 98499-5013 CITY OF DES MOINES 21630 11T" AVE S DES MOINES WA 98198 ❑ Lath rQ desmoineswa. gov WATER DISTRICT #54 922 S 219TH ST DES MOINES WA 98198-6392 BPA TER 3 28401 COVINGTON WAY SE KENT WA 98042 TONNA BARUSO CENTURY LINK COMMUNICATIONS. 2510 84T" ST S STE 18 KEWOOD WA 98499-9034 SOUTH KING COUNTY LORI KITTREDGE REGIONAL WATER ASSOCIATION METRO TRANSIT 27224 144T" AVE SE KSC-TR-0413 KENT WA 98042 201 S JACKSON ST SEATTLE WA 9810, JERRY STEELE �AN MCGEOUGH -, r OSP ENGINEERING WA/OR/N. lb'% COMCAST CABLE COMM AT&T CABLE MAINTENANCE �. 4020 AUBURN WAY N AUBURN WA 98002-13 11241 WILLOWS RD NE STE 130 EDMOND WA 98052-1009 CRAIG GIBSON TACOMA PUBLIC UTILITIES PO BOX 11007 TACOMA WA 98411 PUBLIC WORKS DIRECTOR ALGONA CITY HALL 402 WARDE ST ALGONA WA 98001-8505 WASH ENVIRON COUNCIL 1402 3RD AVE STE 1400 SEATTLE WA 98101-2179 CITY OF NORMANDY PARK 801 SW 174T" ST NORMANDY PARK WA 98166 WATER DISTRICT #111 27224 144T" AVE SE KENT WA 98042-9058 MICHAEL FELDMAN AVIATION PLANNING SEATAC PO BOX 68727 SEATTLE WA 98168-0727 GORDON HOWELL QWEST COMMUNICATION 2510 S 84T" ST STE 18 LAKEWOOD WA 98499 NE TAC NEIGHBORHOOD COUNCIL C/O DONNA STENGER TACOMA ECONOMIC DEV 747 MARKET ST RM 900 TACOMA WA 98402-3793 CITY OF MILTON 1000 LAUREL ST MILTON WA 98354 FRIENDS OF THE HYLEBOS PO BOX 24971 FEDERAL WAY WA 98093 DAVID OSAKI CITY OF FIFE 5411 23RD ST E FIFE WA 98424 dvsakigcityoffife.org COVINGTON WATER DISTRICT 18631 SE 300TH PL KENT WA 98042-9208 HOLLY WILLIAMSON OLYMPIC PIPELINE CO 2319 LIND AVE SW RENTON WA 98055 Updated September 12, 2014 4 "� Tamara Fix From: Tamara Fix Sent: Thursday, October 02, 2014 2:30 PM To: Suzanne.Landerson@usace.army.mi1; 'sepau nit@ ecy.wa.gov'; 'ramin.pazooki@wsdot.wa.gov'; 'gretchen.kaehler@dahp.wa.gov'; 'gary.kriedt@kingcounty.gov'; 'maint.roads@kingcounty.gov'; 'sepacenter@dnr.wa.gov'; 'sepadesk@dfw.wa.gov'; 'Fisher, Larry D (DFW)';'brandon.reynon@puyalluptribe.com'; 'tnascime@fwps.org'; 'sepa@pscleanair.org'; 'laura.murphy@muckleshoot.nsn.us'; 'Brian Asbury'; Chris Ingham; Gordon Goodsell; 'bhan@piercetransit.org'; Cc: Stacey Welsh Subject: S 304th St/28th Ave S Intersection Improvements Attachments: 20141002142606.pdf Attached is the NOA & Opt DNS and Environmental Checklist for the above -mentioned project in the City of Federal Way. This is being issued on October 3, 2014, and the Associate Planner for the project is Stacey Welsh, 253-835-2634, stace .welsh cit offederalwa .cam. RECEIVED BY COMMUNITY & ECONOMIC DEVELOPMENT DEPARTMENT NOV 0 i 2014 31919 1 11 Ave S, Suite 101 a era . Way, WA 98003 1 253.92b.5565 1253.925.5750 (f) Affidavit of -Publication Rudi Alcott, being first duly sworn on oath, deposes and says that he is the Publisher of The Federal Way Mirror, a weekly newspaper. That said newspaper is published in the English language continually as a weekly newspaper in Federal Way, King County, Washington, and is now and during all of said time has been printed in an office maintained by the aforementioned place of publication of said newspaper. That the annexed is a true copy of a legal advertisement placed by City of Federal Way- Community Development as it was published in regular issues (and not in supplemental form) of said newspaper once each week for a period of one consecutive weeks(s), commencing on the 3rd day of October 2014 , and ending on the 3rd day ofOctober 201both dates inclusive, and that such newspaper was regularly distributed to its readers during all of said period. That the full amount of the fee charged for the foregoing publication is the sum of 167.27, which amount has been paid in full, or billed at the legal rate according to RCW 65.16.020. Subscribed to and sworn before me this 6th day of November 2014. Notary Public in and for the State of Washington, Residing at Buckley z��►��R 'A ANQ ? •p A � D G NOTARY ; Z a PUBIC ' + (P OF W 1ST �'�� stalling a traffic signal, street lights and construct- ing a northbound right turn lane at the intersection of 28th Ave. S. and S. 304th St The northbound turn lane will require roadway widening, including right -at -way aequlsltion on up to 3 parcels, and a Shoreline Permit since the widening occurs within 200 ft. of Sleet Lake. Proposed improvements in- clude: Installing curb, gutter, and sidewalk at the southeast corner ai the intersection; a retaining wall to feftate Impacts to private property on the east side of 28th Ave. S, improving the exfslfng stormwaler System (including adding lreatmeot where none currently exfsls); Incorporating low impact development and natural practices to the maximum extent passible; utility vault and pole rc. locations andlor adjustments; and access revisions (driveways) to private properties. Applicant: Christine Mellen, City of Federal Way Public Works, 33325 8lh Avenue South, Federal Way, WA 98003 Project Location: S. 304th Street/28th Ave. S. In- tersection, Federal Way Dale Application Reselved: August 28, 2014 Data Determined Complete: September 25, 2014 Date of Notica of Application: October 3, 2014 Comment Due Date: October 20, 2014 Environmental Review: Based upon review of a completed environmental checklist and other infor- mation on file with the City, tt is likely that the Cillyy of Federal Way will determine that the project wlfl not have a probable significant adverse Impact on the environment and expects to Issue a Datermfna- On of Nonsfgniffcance (DNS) for this project- The aplianal DNS process in WAC 197.11.355 Is being used. This may be your only opportunity to com- ment an the environmental impacts of the pro- posed project- The proposal may Include mitfga- llan measureS under applicable Cedes, and the re- view process may incorporate or require mftiQation measures regardless of whether an environmental impact statement (EIS) Is prepared. A copy of the subsequent threshold determinalion for the specif- ic proposal may be obtained upon request. Agen- cies, tribes, and the public are encouraged to re- view and comment on the proposed project and its probable environmental impacts. Comments must be submitted by the date noted above. PermilsfFites Under Review: Use Process fit (Fife 114-104551-UP), Shoreline Substantial Develop- ment Permit [File 014-104557-Sit), and State Envi- ronmental Policy Act Threshold Determinatan (File 114-104556-SE). Environmental Documents & Required Sludies. En- vironmental Checklist and Gentechnfeal Report Development Regulations Used for Project Mitiga- tion: Federal Way Revised Code Title 14, 'Environmental Policy; TWO 15 'Shoreline manage- ment;' Title 16'Surface Water Management-; and Title 19 7oning and Oevelapment Code.' Public Comment & Appeals: Any person may sub- mit wrttlen comments regarding the land use ap- pllcation or the environmental Impacts of the pro- posal to the Director of Commuolty Oevelopmenl by 5A0 p.m. on October 20, 2014. Only persons who submit written comments to the Director [ad- dress below) or specifically request a copy of the decision, may appeal the docisforl. However, any Interested party may appeal the environmental threshold determination. Issuance of Final Environmental Determination: The final DNS may be issued without a second comment period, unless timely comments Identify probable significant adverse impacts that were not considered by the Notice of Optionat DNS. A copy at the DNS may be obtained upon request Availability of File: The oftal project fites, existing environmental documents and required studies are avallable for ublic review at the Department of Community Development, 33325 8th Avenue South, Federal Way, WA 98003. Federal Way Staff Contact: Stacey Welsh — Associate Planner, NOTICE OF MASTER LAND OF MASTER 253-835-2&34 Published in Federal Way Mirror October 3, 2014 USE APPLICATION AND FWM 2170 OPTIONAL DETERMINATION OF NONSIGNIFICANCE IONS) Project Name: S. 304th StreeU281h Ave. S. inter- section Improvements Project Description: The proposal consists of in- 40k CITY 10';:tS;P OF Federal Way DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT 33325 8th Avenue South Federal Way WA 98003 253-835-7000; Fax 253-835-2609 www.cityoffederclwciy.com DECLARATION OF DISTRIBUTION 1, � hereby declare, under penalty of perjury of the laws of the State of Washington, that a: ❑ Notice of Land Use Application/Action ❑ Notice of Determination of Significance (DS) and Scoping Notice ❑ Notice of Environmental Determination of Nonsignificance (SEPA, DNS) ❑ Notice of Mitigated Environmental Determination of Nonsignificance (SEPA, MDNS) Notice of Land Use Application & Optional DNS/MDNS ❑ FWRC Interpretation ❑ Other ❑ Land Use Decision Letter ❑ Notice of Public Hearing before the Hearing Examiner ❑ Notice of Planning Commission Public Hearing ❑ Notice of LUTC/CC Public Hearing ❑ Notice of Application for Shoreline Management Permit ❑ Shoreline Management Permit ❑ Adoption of Existing Environmental Document was ❑ mailed ❑ faxed fie -mailed and/or ❑ posted to or at each of the attached addresses on lJ C_t—r�2014. Project NameQ File Number(s) ) Signature Date i0 - J KACD Administration FilesWeclaration of Disftution.doc/Last printed 1 /22/2014 2:40:00 PM Tamara Fix From: Jennifer Anderson <jnderson@fedwaymirror.com> Sent: Thursday, October 02, 2014 9:10 AM To: Tamara Fix Subject: Re: Intersection Improvements Legal Notice got it, thanks! Jennifer Anderson Advertising Sales Consultant Office: 253-925-5565, Ext 3056 Internal: 02-3056 Fax: 253-925-5750 31919 1st Ave S, Ste 101, Federal Way, WA 98003 �_ Sound Publishing, Inc. Map Print Rates Online Rates Media Kit Sound €nfo On Thu, Oct 2, 2014 at 8:04 AM, Tamara Fix <Tamara.Fix@cityoffederalway.com> wrote: Please publish the following legal notice (304th & 28th NOA & Opt DNS) in Friday's (Oct. 3, 2014) issue. Please confirm and issue an affidavit of publication. I have one more coming for sure. {7r Of Federal Way NOTICE OF MASTER LAND USE APPLICATION AND OPTIONAL DETERMINATION OF NONSIGNIFICANCE (DNS) Project Name: S. 3041h Street/281h Ave. S. Intersection Improvements i Project Description: The proposal consists of installing a traffic signal, street lights and constructing a northbound right turn lane at the intersection of 28`h Ave. S. and S. 3041h St. The northbound turn lane will require roadway widening, including right-of-way acquisition on up to 3 parcels, and a Shoreline Permit since the widening occurs within 200 ft. of Steel Lake. Proposed improvements include: installing curb, gutter, and sidewalk at the southeast corner of the intersection; a retaining wall to mitigate impacts to private property on the east side of 281h Ave. S; improving the existing stormwater system (including adding treatment where none currently exists); incorporating low impact development and natural practices to the maximum extent possible; utility vault and pole relocations and/or adjustments; and access revisions (driveways) to private properties. Applicant: Christine Mullen, City of Federal Way Public Works, 33325 8th Avenue South, Federal Way, WA 98003 Project Location: S. 3041h Street/28th Ave. S. Intersection, Federal Way Date Application Received: August 28, 2014 Date Determined Complete: September 25, 2014 Date of Notice of Application: October 3, 2014 Comment Due Date: October 20, 2014 Environmental Review: Based upon review of a completed environmental checklist and other information on file with the City, it is likely that the City of Federal Way will determine that the project will not have a probable significant adverse impact on the environment and expects to issue a Determination of Nonsignificance (DNS) for this project. The optional DNS process in WAC 197-11-355 is being used. This may be your only opportunity to comment on the environmental impacts of the proposed project. The proposal may include mitigation measures under applicable codes, and the review process may incorporate or require mitigation measures regardless of whether an environmental impact statement (EIS) is prepared. A copy of the subsequent threshold determination for the specific proposal may be obtained upon request. Agencies, tribes, and the public are encouraged to review and comment on the proposed project and its probable environmental impacts. Comments must be submitted by the date noted above. Permits/Files Under Review: Use Process III (File #14-104551-UP), Shoreline Substantial Development Permit (File #14-104557-SH), and State Environmental Policy Act Threshold Determination (File #14-104556- SE). Environmental Documents & Required Studies: Environmental Checklist and Geotechnical Report. Development Regulations Used for Project Mitigation: Federal Way Revised Code Title 14, `Environmental Policy;' Title 15 `Shoreline Management;' Title 16 `Surface Water Management;' and Title 19 `Zoning and Development Code.' Public Comment & Appeals: Any person may submit written comments regarding the land use application or the environmental impacts of the proposal to the Director of Community Development by 5:00 p.m. on October 20, 2014.Only persons who submit written comments to the Director (address below) or specifically request a copy of the decision, may appeal the decision. However, any interested party may appeal the environmental threshold determination. Issuance of Final Environmental Determination: The final DNS may be issued without a second comment period, unless timely comments identify probable significant adverse impacts that were not considered by the Notice of Optional DNS. A copy of the DNS may be obtained upon request. Availability of File: The official project files, existing environmental documents and required studies are available for public review at the Department of Community Development, 33325 8"' Avenue South, Federal Way, WA 98003. Staff Contact: Stacey Welsh — Associate Planner, 253-835-2634 A�k CITY OF Federal Way PURPOSE OF CHECKLIST DEPARTMENT OF COMMUNITY DEVELOPMENT SERVICES 33325 8`b Avenue South Federal Way, WA 98003-6325 253-835-2607; Fax 253-835-2609 w w w. cityo ffedera 1 way. co ni ENVIRONMENTAL CHECKLIST The State Environmental Policy Act (SEPA), Revised Code of Washington (RCW) Chapter 43.21C, requires all governmental agencies to consider the environmental impacts of a proposal before making decisions. An environmental impact statement (EIS) must be prepared for all proposals with probable significant adverse impacts on the quality of the environment. The purpose of this checklist is to provide information to help you and the agency identify impacts from your proposal (and to reduce or avoid impacts from the proposal, if it can be done) and to help the agency decide whether an EIS is required. INSTRUCTIONS FOR APPLICANTS This environmental checklist asks you to describe some basic information about our proposal. Governmental agencies use this checklist to determine whether the environmental impacts of your proposal are significant, requiring preparation of an EIS. Answer the questions briefly, with the most precise information known, or give the best description you can. You must answer each question accurately and carefully, to the best of your knowledge. In most cases, you should be able to answer the questions from your own observations or project plans without the need to hire experts. If you do not know the answer, or if a question does not apply to your proposal, write "do not know" or "does not apply." Complete answers to questions now may avoid unnecessary delays later. Some questions ask about governmental regulations, such as zoning, shoreline, and landmark designations. Answer these questions if you can. If you have problems, the governmental agencies can assist you. The checklist questions apply to all parts of your proposal, even if you plan to do them over a period of time or on different parcels of land. Attach any additional information that will help describe your proposal or its environmental effects. The agency to which you submit this checklist may ask you to explain your answers or provide additional information reasonably related to determining if there may be significant adverse impact. USE OF CHECKLIST FOR NON -PROJECT PROPOSALS Complete this checklist for non -project proposals, even though questions may be answered "does not apply." In addition, complete the Supplemental Sheet for Non -Project Actions. For non -project actions, the references in the checklist to the words "project," "applicant," and "property or site" should be read as "proposal," "proposer," and "affected geographic area," respectively. RECEIVED AUG 2 8 Z014 CITY OF FEDERAL WAY CDS A. BACKGROUND Name of proposed project, if applicable: City of Federal Way 28th Ave S at S 304th Street Intersection Improvement Name of applicant: City of Federal Way, Public Works Department Address and phone number of applicant and contact person: Christine Mullen, P.E., Street Systems Project Engineer, City of Federal Way Public Works Department 33325 8th Ave S Federal Way, WA 98003 (253) 835-2723 Date checklist prepared: December 12, 2013 Agency requesting checklist: City of Federal Way, Community and Economic Development Proposed timing or schedule (including phasing, if applicable): Phasing is not proposed. The City plans to commence the project as soon as construction funding is available. Do you have any plans for future additions, expansion, or further activity related to or connected with this proposal? If yes, explain. The proposed improvements address current capacity and safety needs at the intersection, but do not fully improve all legs of the intersection to ultimate City standards. However, no future plans, expansions, or additional activities related to this proposal are known at this time. List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal. A geotechnical report is being prepared by Landau Associates. The project will also require a Shoreline Permit. Do you know whether applications are pending for governmental approvals of other proposals directly affecting the property covered by your proposal? If yes, explain. No applications are known to be pending at this time. 10. List any government approvals or permits that will be needed for your proposal, if known. — .. . . . . i .:II —_....-_ - rl---_I:..._ r..L...+... .;_I r%-....1---- -+ rl.,r.....:+ --A r+i,r - —+— -,v,r,rn,i-.11 Additional right of way is required for the lane widening. 11. Give brief, complete description of your proposal, including the proposed uses and the size of the project and site. There are several questions later in this checklist that ask you to describe certain aspects of your proposal. You do not need to repeat those answers on this page. The proposal consists of installing a traffic signal, street lights and constructing a northbound right turn lane at the intersection of 28th Ave S and S 304"' St in Federal Way. The northbound turn lane will require roadway widening, including right-of-way acquisition on up to 3 parcels, and a Shoreline Permit since the widening occurs within 200 ft of Steel Lake. Proposed improvements include: installing curb, gutter, and sidewalk at the southeast corner of the intersection; a retaining wall to mitigate impacts to private property on the east side of 28th Ave S; improving the existing stormwater system (including adding treatment where none currently exists); incorporating low impact development and natural practices to the maximum extent possible; utility vault and pole relocations and/or adjustments; and access revisions (driveways) to private properties. 12. Location of the proposal. Give sufficient information for a person to understand the precise location of your proposed project, including a street address, if any, and section, township, and range, if known. If a proposal would occur over a range of area, provide the range or boundaries of the site(s). Provide a legal description, site plan, vicinity map, and topographic map, if reasonably available. While you should submit any plans required by the agency, you are not required to duplicate maps or detailed plans submitted with any permit applications related to this checklist. The project is located in Township 21 North, Range 4 East, Sections 4 and 9, at the intersection of 28th Ave S and S 304th Street in Federal Way, Washington. A vicinity map and project plans are attached for reference. B. ENVIRONMENTAL ELEMENTS 1. EARTH a. General description of the site (circle one): flat rolling hilly, steep slopes, mountainous, other- b. What is the steepest slope on the site (approximate percent slope)?: —50% (2:1) c. What general types of soils are found on the site (for example, clay, sand, gravel, peat, mulch)? If you know the classification of agricultural soils, specify them and note any prime farmland. According to the U.S. Department of Agriculture Natural Resources Conservation Service Web Soil Survey, the project area consists mostly of "arents", which are soils that have been disturbed by human activities. The rest of the project area consists of gravelly sandy loam. d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe. There are no surface indications or history of unstable soils in the immediate vicinity. e. Describe the purpose, type, and approximate quantities of any filling or grading proposed. Indicate source of fill. Up to 50 cubic yards of fill from on site excavation or a clean local source and up to 500 cubic yards of excavation will be required to bring the project area to the proper grade and complete the proposed improvements. f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe. Erosion should not occur as a result of clearing, construction, or use. g. About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)? The site is a developed roadway with paved shoulders. It is estimated that over 80 percent of the site is currently impervious pavement. Through addition of approximately 3,820 square feet (sf) of new impervious surface, this is estimated to be over 90 percent of the site; however, up to 1,000 sf of the new impervious is non -pollution generating impervious surface since it is sidewalk. Additionally, to minimize the amount of new impervious surface, approximately 1,340 sf of pervious sidewalk will be installed. h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any. Best Management Practices for sediment and erosion control will be implemented to prevent erosion during construction, and erosion will not be caused by the completed project or final use. Areas disturbed by the project will be hydroseeded to prevent erosion after the project is completed. 2. AIR a. What types of emissions to the air would result from the proposal (i.e., dust, automobile, odors, and industrial wood smoke) during construction and when the project is completed? If any, generally describe and give approximate quantities if known. Air emissions related to vehicles may increase slightly at the intersection, which is currently controlled by stop signs. Installing a traffic signal increases vehicle idling time; however, the increase in air emissions is expected to be minor. b. Are there any off -site sources of emissions or odor that may affect your proposal? If so, generally describe. There are no known off -site sources of emissions or odor that could affect the proposal. c. Proposed measures to reduce or control emissions or other impacts to air, if any. Impacts to emissions will be minor, and measures to reduce or control emissions are not anticipated to be necessary and are not proposed. 3. WATER a. Surface. 1) Is there any surface water body on or in the immediate vicinity of the site (including year-round and seasonal streams, saltwater, lakes, ponds, wetlands)? If yes, describe type and provide names. If appropriate, state what stream or river it flows into. Steel Lake, a freshwater shoreline environment, is in the vicinity of the project area. According to King County iMap, no streams or rivers connect to Steel Lake. 2) Will the project require any work over, in, or adjacent to (within 200 feet) the described waters? If yes, please describe and attach available plans. The majority of project work will not occur within 200 feet of Steel Lake; however, some excavation, fill, grading, and additional paving will be required within 200 ft of the Steel Lake shoreline designation. 3) Estimate the amount of fill and dredge material that would be placed in or removed from surface water or wetlands and indicate the area of the site that would be affected. Indicate the source of fill material. All work is being conducted on already developed and paved areas and no in -water work will occur. Material will not be placed in or removed from Steel Lake. Per the city of Federal Way critical area maps and the site visit, wetlands and streams are not known to occur in the project area. 4) Will the proposal require surface water withdrawals or diversions? Give general description, purpose, and approximate quantities if known. The project will not require surface water withdrawals or diversions. 5) Does the proposal lie within a 100-year floodplain? If so, note location on the site plan. The project is not located within a 100-year floodplain. 6) Does the proposal involve any discharges of waste materials to surface waters? If so, describe the type of waste and anticipated volume of discharge. Stormwater from increased impervious surface will be routed to the existing stormwater system, which discharges to Steel Lake. Stormwater in the project area is currently not treated. The project is not required to implement water quality treatment for new and replaced impervious surfaces. The Contracting Agency has elected to add a water quality treatment facility to the existing conveyance system which may include Stormfilters "or similar treatment devices. The existing conveyance system is better defined along S 304th Street and stormwater runoff from both S 3041h Street and 28th Avenue S outfall to Steel Lake within a quarter mile of the project. A portion of the stormwater runoff along S 304th Street, greater than the area of new impervious surface along 28th Avenue S, will be treated. Treatment of stormwater runoff from the project site will be improved and no waste materials will be discharged to Steel Lake. b. Ground. 1) Will ground water be withdrawn, or will water be discharged to groundwater? Give general description, purpose, and approximate quantities if known. The project will not require withdrawals from or discharges to groundwater. 2) Describe waste material that will be discharged into the ground from septic tanks or other sources, if any (for example: domestic sewage; industrial, containing the following chemicals...; agricultural; etc.). Describe the general size of the system, the number of such systems, the number of houses to be served (if applicable), or the number of animals or humans the system(s) are expected to served. The project will not require discharge of waste material into the ground. c. Water Runoff (including stormwater) 1) Describe the source of runoff (including stormwater) and method of collection and disposal, if any (include quantities, if known). Where will this water flow? Will this water flow into other waters? If so, describe. Runoff will consist of stormwater from up to 3,820 sf of new impervious surface (up to 1,000 sf of non pollution -generating impervious sidewalk and up to 2,820 sf of roadway pavement). This stormwater will flow to the existing stormwater system, which flows to Steel Lake and will be improved as part of the proposed project. The improvements to the existing stormwater system will incorporate low impact development and natural drainage practices to the maximum extent practicable. Additionally, to minimize the amount of new impervious surface, approximately 1,340 sf of pervious sidewalk will be installed. 2) Could waste materials enter ground or surface waters? If so, generally describe. A water quality treatment facility will be added to the existing stormwater system along S 304th Street. Treated stormwater will be discharged to Steel Lake via the existing stormwater system, which is an improvement over existing conditions. Runoff from both S 304th Street and 281h Avenue S outfalls to Steel Lake within a quarter mile of the project site. The amount of untreated stormwater discharging Because the stormwater will be treated, no waste materials will enter to Steel Lake will be decreased ground or surface waters. d. Proposed measures to reduce or control surface, ground, and runoff water impacts, if any. No control of roadway runoff water is required on this project because the amount of new impervious area is below the threshold requirements for flow control per Washington State DOE guidelines. However, water quality treatment, which is also not required, is being included as an extra measure at the discretion of the contracting agency. 4. PLANTS a. Check or circle types of vegetation found on the site. deciduous tree: alder, maple, aspen, other _ evergreen tree. fir cedar, pine, other_ hrubs (ornamental shrubs rass pasture _ crop or grain wet soil plants: cattail, buttercup, bulrush, skunk cabbage, other _ water plant: water lily, eelgrass, milfoil, other_ other types of vegetation b. What kind and amount of vegetation will be removed or altered? The site is currently mostly paved. Minor amounts of grass and ornamental landscape trees and shrubs may be removed to accommodate the intersection improvements. c. List threatened or endangered species known to be on or near the site. The site is mostly developed and not known or anticipated to contain any threatened or endangered plant species. The Washington Department of Natural Resources Natural Heritage Program database indicates that the nearest rare plants are located over 2 miles from the project area. d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any. The completed project will consist mostly of pavement and minor roadside restoration improvements. 5. ANIMALS a. Circle any birds and animals which have been observed on or near the site or are known to be on or near the site. birds: hawk, heron, eagle, ongbirds ther (waterfowl mammals: deer, bear, elk, beaver, other fish: bass, salmon, trout, herring, shellfish, other b. List any threatened or endangered species known to be on or near the site. The site is previously developed. The Washington State Department of Fish and Wildlife, Priority Habitats and Species Data and the SalmonScape Database indicate that no threatened or endangered animal species are known or anticipated to be on or near the site. c. Is the site part of a migration route? If so, explain. The site is within the Pacific flyway bird migration route. Steel Lake is identified by the WDFW PHS data as containing waterfowl concentrations. The proposed project will not impact Steel Lake or waterfowl using the lake habitat. d. Proposed measures to preserve or enhance wildlife, if any. The project is not anticipated to impact wildlife; therefore, no measures to preserve or enhance wildlife are proposed. 6. ENERGY AND NATURAL RESOURCES a. What kinds of energy (electric, natural gas, oil, wood stove, solar) will be used to meet the completed project's energy needs? Describe whether it will be used for heating, manufacturing, etc. The project will require electricity for the traffic signal and street lighting. These features will use the existing electricity at the site. b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe. The project will not affect the potential use of solar energy by adjacent properties. c. What kinds of energy conservation features are included in the plans of this proposal? List other proposed measures to reduce or control energy impacts, if any. No energy conservation features are proposed for this project at this time. 7. ENVIRONMENTAL HEALTH a. Are there any environmental health hazards, including exposure to toxic chemicals, risk of fire and explosion, spill, or hazardous waste that could occur as a result of this proposal? If so, describe. The project area is residential and it is anticipated the site use has always been residential. The site is not known to contain any environmental health hazards and the project is not anticipated to generate contaminated materials. The completed project will not result in potential exposure to toxic chemicals, fire or explosion, spills, or hazardous waste. No toxic chemicals or hazardous waste will be produced by the project. Describe special emergency services that might be required. The project will improve the safety of the intersection by installing a sidewalk, a traffic signal, lighting, and a turn lane. Therefore, the project will not require special emergency services. Proposed measures to reduce or control environmental health hazards, if any. No environmental health hazards are anticipated that would require measures for control or reduction. b. Noise. 1) What types of noise exist in the area which may affect your project (for example: traffic, equipment operation, other)? Minor amounts of traffic related noise exist in the area, but these will not affect the project. 2) What types and levels of noise would be created by or associated with the project on a short-term or long-term basis (for example: traffic, construction operation, other)? Indicate what hours noise would come from the site. Vehicular traffic noise is typically caused by three factors: engine operation, exhaust, and tire contact with pavement. Vehicles in motion produce more noise than idling vehicles. Existing traffic control at the intersection includes stop signs, which will be replaced with traffic signals; additionally, the project will not increase traffic volumes or roadway capacity. Therefore, the project is not anticipated to increase noise levels associated with vehicles. Minor temporary noise will occur related to construction primarily during daylight hours. Proposed measures to reduce or control noise impacts, if any. The only anticipated noise impact from the project is minor and temporary construction. The construction and therefore the construction -related noise will be limited primarily to daylight hours. No permanent noise impacts are anticipated. 8. LAND AND SHORELINE USE a. What is the current use of the site and adjacent properties? The site is currently an intersection abutted by single-family residences and is zoned single family residential (RS 7.2 and RS 9.6). b. Has the site been used for agriculture? If so, describe. The site is in a residential neighborhood and not known to have been used for agriculture. c. Describe any structures on the site. The site does not contain any structures. Overhead electrical utilities are located at the site. d. Will any structures be demolished? If so, what? No structures will be demolished. e. What is the current zoning classification of the site? The site is zoned single family residential (RS 7.2 and RS 9.6). f. What is the current comprehensive plan designation of the site? The comprehensive plan designation is single family, high density. g. If applicable, what is the current shoreline master program designation of the site? It is anticipated that the southern portion of the site is located within the Steel Lake residential shoreline designation. h. Has any part of the site been classified as an environmentally critical area? If so, specify. Other than the shoreline designation, the City of Federal Way critical area map does not show the area as being classified as an environmentally critical area. Approximately how many people would reside or work in the completed project? The completed project will neither create nor eliminate employment opportunities. j. Approximately how many people would the completed project displace? The project right of way requirements will not result in any displacements. k. Proposed measures to avoid or reduce displacement impacts, if any. There will be no displacements; as such, no measures to avoid or reduce displacements are needed. I. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if a ny. The proposal is for improvements to an existing intersection and is compatible with existing and proposed land use and traffic plans. Therefore, no additional measures are proposed or needed. 9. HOUSING a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low-income housing. The project will neither create nor destroy housing units. b. Approximately how many units, if any, would be eliminated? Indicate whether high, middle, or low-income housing. The project will neither create nor destroy housing units. c. Proposed measures to reduce or control housing impacts, if any. There will be no housing impacts. Therefore, no measures are proposed or needed. 10. AESTHETICS a. What is the tallest height of any proposed structure(s), not including antennas; what is the principal exterior building material(s) proposed? The proposed street lights and traffic signals will be the tallest structures at the site and will be less than 50 feet in height. b. What views in the immediate vicinity would be altered or obstructed? No views will be altered or obstructed. c. Proposed measures to reduce or control aesthetic impacts, if any. There will be no aesthetic impacts. Therefore, no measures are proposed or needed. 11. LIGHT AND GLARE a. What type of light or glare will the proposal produce? What time of day would it mainly occur? The project will include installation of two new traffic signal poles and two luminaires at the intersection. The traffic signal will produce light at all times, and the street lights will be illuminated at night and will improve safety at the intersection. b. Could light or glare from the finished project be a safety hazard or interfere with views? The light from the project will improve safety by signaling traffic at the intersection and providing nighttime illumination and is not a safety hazard and does not interfere with views. c. What existing off -site sources of light or glare may affect your proposal? There are no existing off -site sources of light or glare that could affect the proposal. d. Proposed measures to reduce or control light and glare impacts, if any. There will be no impacts from the minimal light produced by the traffic signal, and no impacts are anticipated from the street light. Therefore, no measures to reduce or control light impacts are needed or proposed. 12. RECREATION a. What designated and informal recreational opportunities are in the immediate vicinity? Steel Lake provides recreational opportunities, such as a beach, swimming, kayaking and canoeing, and fishing. Additionally, local residents walk and bike along the roadways at the project site. b. Would the proposed displace any existing recreational uses? If so, describe. The project will not displace existing recreational uses and improves access and safety for pedestrians and cyclists at the intersection and along the existing roadway. c. Proposed measures to reduce or control impacts on recreation, including recreation opportunities to be provided by the project or applicant, if any. The project improves access and safety and no measures are proposed or needed. 13. HISTORIC AND CULTURAL PRESERVATION a. Are there any places or objects listed on, or proposed for, national, state, or local preservation registers known to be on or next to the site? If so, generally describe. There are no places or objects listed on, or known to be proposed for, the historic register. Several properties listed on the state historic property inventory are located near the site but are outside the project area. These properties will not be impacted by the proposed project. c. Generally describe any landmarks or evidence of historic, archaeological, scientific, or cultural importance known to be on or next to the site. No landmarks or evidence of historic, archaeological, scientific, or cultural importance are known to be on or next to the site. The site is disturbed and developed with the existing roadway and surrounding homes. d. Proposed measures to reduce or control impacts, if any. The project will not impact historic properties and, due to the disturbed nature of the site, it is highly unlikely to encounter or impact cultural resources. If cultural resources are discovered during ground disturbing activities, the appropriate agencies or tribes will be contacted. 14. TRANSPORTATION a. Identify public streets and highways serving the site, and describe proposed access to the existing street system. Show on site plans, if any. The site consists of the 28th Avenue South and South 304th Street approaches, intersection, and adjacent areas. Therefore, the site is served by 28th Avenue South and South 304th Street. b. Is the site currently served by public transit? If not, what is the approximate distance to the nearest transit stop? The site is currently served by King County Metro Transit bus Route 183. b. How many parking spaces would the completed project have? How many would the project eliminate? The project will neither create nor eliminate parking spaces. Automobiles currently do not park on the shoulder near the intersection where the right turn lane will be constructed. c. Will the proposal require any new roads or streets, or improvements to existing roads or streets, not including driveways? If so, generally describe (indicate whether public or private). The project consists primarily of improvements to existing public roads (28th Avenue South and South 3041h Street). See project description and site plans. The project may require alterations to the driveways of adjacent existing properties. d. Will the project use (or occur in the immediate vicinity of) water, rail, or air transportation? If so, generally describe. The project will not use or occur in the immediate vicinity of water, rail, or air transportation. f. How many vehicular trips per day would be generated by the completed project? If known, indicate when peak volumes would occur. The proposed project will add a turn lane and traffic signal but will not increase vehicular capacity of the roadways. Therefore, the project will not generate any additional vehicular trips. g. Proposed measures to reduce or control transportation impacts, if any. The project is not anticipated to result in transportation impacts; therefore, no measures are proposed. 15. PUBLIC SERVICES a. Would the project result in an increased need for public services (for example: fire protection, police protection, health care, schools, other)? If so, generally describe. The project will improve safety at the intersection and will not increase the need for public services. b. Proposed measures to reduce or control direct impacts on public services, if any. There will be no adverse impact on public services; by providing a dedicated turn lane, the safety improvements may improve public service access to the surrounding area. Therefore, no measures are proposed or needed. 16. UTILITIES Circle utilities currently available at the site• electricit natural gas ater, refuse service elephone nits sewer, eptic system ther (please list) torm sewer There is a sanitary sewer system located within the project area. Properties to the east of 28th Avenue South are still using septic systems. The proposed right-of-way acquisitions may impact septic drain field setbacks. c. Describe the utilities that are proposed for the project, the utility providing the service, and the general construction activities on the site or in the immediate vicinity which might be needed. The project will require modifications to the existing City storm sewer. Additionally, the traffic signal and street light will use the existing overhead electricity at the site. It is anticipated that only one overhead communication utility relocation will occur due to one pole that needs to be relocated to construct the new right turn lane. All relocations will be the responsibility of the Utility owners. C. SIGNATURE The above answers are true and complete to the best of my knowledge. I understand that the lead agency is relying on them to make its decision. SIGNATURE: ehlz� /III , DATE SUBMITTED: g."I) e-miev 714-1 Geotechnical Deport South 3041h Street at 28th Avenue South Intersection Improvements Federal Way, Washington August 19, 2014 Prepared for Tetra Tech LANDAU !A7---1 ASSOCIATES 950 Pacific Avenue, Suite 515 Tacoma, WA 98402 (253) 926-2493 TABLE OF CONTENTS Page 1.0 INTRODUCTION 1-1 1.1 PROJECT DESCRIPTION 1-1 1.2 SCOPE OF SERVICES 1-1 2.0 EXISTING SITE CONDITIONS 2-1 2.1 SURFACE CONDITIONS 2-1 2.2 GEOLOGIC SETTING 2-1 2.3 FIELD EXPLORATION PROGRAM 2-1 2.4 SUBSURFACE SOIL CONDITIONS 2-2 2.5 GROUNDWATER 2-2 3.0 CONCLUSIONS AND RECOMMENDATIONS 3-1 3.1 EARTHWORK 3-1 3.1.1 Wet Weather Considerations 3-1 3.1.2 Site Preparation 3-2 3.1.3 Temporary and Permanent Slopes 3-2 3.1.4 Subgrade Preparation 3-3 3.1.5 Structural Fill 3-3 3.1.6 Backfill and Compaction Requirements 3-4 3.2 CONSTRUCTION DEWATERING 3-4 3.3 UTILITY CONSTRUCTION 3-5 3.3.1 Trenching and Excavation Support 3-5 3.3.2 Pipe Foundation Support 3-6 3.3.3 Pipe Bedding and Initial Backfill 3-7 3.3.4 Trench Backfill and Compaction Criteria 3-7 3.3.5 Pipe Types 3-8 3.3.6 Settlement and Buoyancy 3-8 3.3.7 Resistance to Lateral Loads 3-8 3.3.8 Manholes 3-8 3.4 SIGNAL AND ILLUMINATION POLE FOUNDATIONS 3-9 3.5 PAVEMENT DESIGN 3-10 3.5.1 Resilient Modulus for Pavement Design 3-11 3.5.2 Vehicular Loading 3-11 3.5.3 Flexible Pavement Design 3-12 3.6 INFILTRATION 3-12 3.7 SEISMIC DESIGN CONSIDERATIONS 3-13 3.8 CAST -IN -PLACE WALLS 3-13 3.8.1 Resistance to Lateral Loads 3-15 3.8.2 Retaining Wall Drainage 3-15 3.9 STRUCTURAL EARTH WALLS 3-16 8/19114 Y:\043\012,010\R\Final Report\TT CoFW 304th-28th_final ipt.docx LANDAU ASSOCIATES ii 0 3.9.1 Internal Wall Design 3-16 3.9.2 Wall Subgrade Preparation 3-17 3.9.3 Nominal Bearing Resistance 3-18 3.9.4 Foundation Settlement 3-19 3.9.5 Retaining Wall Foundation Settlement 3-19 3.9.6 Resistance to Lateral Loads 3-19 3.9.7 Global Stability 3-20 3.9.8 Wall Backfill and Drainage Considerations 3-20 4.0 REVIEW OF DOCUMENTS AND CONSTRUCTION OBSERVATIONS 4-1 5.0 USE OF THIS REPORT 5-1 6.0 REFERENCES 6-1 Fig►re Title 1 Vicinity Map 2 Site and Exploration Plan FIGURES APPENDIX A�Mendix Title A Field Explorations and Laboratory Testing 8119/14 YA043\012.010\R\Fiml Report\Tr CoFW 304 th-28th_final rpt.docx LANDAU ASSOCIATES iii LIST OF ABBREVIATIONS AND ACRONYMS AASHTO American Association of State Highway and Transportation Officials ASTM ASTM International BGS Below Ground Surface CBR California Bearing Ratio CDF Controlled Density Fill City City of Federal Way CIP Cast -in -Place CSBC Crushed Surfacing Base Course ESAL Equivalent Single Axle Load FOS Factor of Safety ft Feet/Foot ksf Kips per Foot MSE Mechanically Stabilized Earth pcf Pounds per Cubic Foot PGA Peak Horizontal Ground Acceleration psf Pounds per Square Foot psi Pounds per Square Inch SEW Structural Earth Wall WAC Washington Administrative Code WSDOT Washington State Department of Transportation 8/19/14 Y:\043\012.010\R\Final Report\TT CoFW 304th-28th_final rpLdocx LANDAU ASSOCIATES iv 1 1.0 INTRODUCTION This report presents the results of our field investigations and provides geotechnical engineering conclusions and recommendations for design and construction of the City of Federal Way's (City's) South 304t' Street at 28f Avenue South Intersection Improvements project located in Federal Way, Washington. The purpose of this study was to complete subsurface explorations within the project corridor to characterize soil and groundwater conditions and develop geotechnical conclusions and recommendations for design and construction of the proposed improvements. The general project location is shown on the Vicinity Map (Figure 1). The general configuration of the project site, some of the surrounding site features, and approximate locations of explorations completed for this study are shown on the Site and Exploration Plan (Figure 2). Appendix A presents a description of the field exploration program, summary logs of conditions observed in the explorations completed for this study, and a description and the results of our laboratory testing program. This report has been prepared based on our discussions with representatives of Tetra Tech; base maps of the project area provided by Tetra Tech; our review of readily available subsurface information in the project area, the results of the explorations completed for this project; our familiarity with geologic conditions within the vicinity of the project area; and our experience on similar projects. 1.1 PROJECT DESCRIPTION Based on information provided by Tetra Tech, we understand that the project consists of widening the roadway on 28`h Avenue South near its intersection with South 304d' Street to accommodate a northbound right turn pocket, and constructing a curb, gutter, and sidewalk at the intersection. As part of these intersection improvements, a new traffic signal system and illumination is planned. A utility pole will likely need to be relocated. The utility pole will be relocated by others. Additionally, a retaining wall on the east side of 28ffi Avenue South is necessary to mitigate impacts to one private property. Stormwater improvements are also being considered along with access revisions to one private property. The project limits extend about 150 feet (ft) east and west of the intersection and about 250 ft south of the intersection. The project limits and the planned intersection improvements are illustrated on Figure 2. 1.2 SCOPE OF SERVICES Landau Associates was contracted by Tetra Tech to provide geotechnical engineering services to support the project. Our geotechnical services were provided in accordance with the terms and conditions of a subconsultant agreement between Landau Associates and Tetra Tech dated October 1, 2013 and the 8/19/14 Y:\043\012.010%\FimIReport\TTCoFW304th-28th_fimIrpt nx LANDAU ASSOCIATES 1-1 scope of services described in Work Element 6 in Exhibit A-1 of the contract between the City and Tetra Tech (13-175). To support the project, we provided the following specific services: • Compiled and reviewed readily available geotechnical and geologic information in the project vicinity • Completed two geotechnical borings to depths of about 26 ft below the existing ground surface (BGS) to characterize soil and groundwater conditions for the proposed improvements • Logged each soil unit observed in the exploratory borings and recorded pertinent information, including soil sample depths, stratigraphy, soil engineering characteristics, and groundwater occurrence • Completed geotechnical laboratory testing consisting of natural moisture content determinations and grain size analyses on select samples from the explorations • Completed geotechnical engineering analyses and developed geotechnical engineering conclusions and recommendations in accordance with the Washington State Department of Transportation Standard Specifications for Road, Bridge, and Municipal Construction (WSDOT Standard Specifications; WSDOT 2014) for design and construction of the proposed improvements ■ Prepared and submitted this written report summarizing our findings, conclusions, and recommendations for the project. This report includes: - A site map showing pertinent existing site features and the approximate locations of the explorations completed for this study - Descriptive logs of the explorations and a summary of the subsurface soil and groundwater conditions encountered in the borings - A summary of laboratory test results - General earthwork recommendations - Recommendations for design and construction of underground utilities; including pipes and vaults - An assessment of stormwater infiltration feasibility based on subsurface soil conditions encountered in the explorations - Recommendations for design of signal standard and illumination pole foundations - A summary of pavement sections encountered during our field explorations and recommendations for a new pavement section for the northbound right turn lane - Recommendations for retaining wall design; including cast -in -place (CIP) concrete walls and structural earth walls. 8/19/14 Y:\043\012.010\R\Final Report\TT CoFW 304th-28th_final iptAnx LANDAU ASSOCIATES 1-2 1 '1 2.0 EXISTING SITE CONDITIONS This section provides a discussion of the general surface and subsurface conditions observed along the project corridor at the time of our investigations. Interpretations of the site conditions are based on the results of our review of available information, site reconnaissance, subsurface explorations, and laboratory testing. 2.1 SURFACE CONDITIONS At the time of our field exploration, the portion of the 28`h Avenue South/South 3041h Street intersection that is the subject of this report consists of an asphalt -paved roadway with a single travel lane in each direction and a left-hand turn lane for west -bound traffic. All legs of the intersection have approximately 5-ft wide paved shoulders on both sides of the road. Traffic is controlled at the intersection with stop signs from all three approach directions. Residential properties generally front the roadway. Vegetation along the project alignment consists of a mixture of mature fir trees and landscaped yards with ornamental shrubs and small deciduous trees. Topography in the project vicinity is gently rolling and generally trends downward from east to west and north to south. Along South 30e Street, the elevation changes from about 462 ft at the east end of the project extents to 446 ft at the west end (average grade of about 31/2 percent). Along 28 h Avenue South, the topography descends from the intersection (elevation 457 ft) to about elevation 452 ft at the south side of the project extents (average grade of about 2 percent). 2.2 GEOLOGIC SETTING General geologic information for the project area was obtained from the Geologic Map of the Poverty Bay 7.5-Minute Quadrangle, King and Pierce Counties, Washington (Booth et al. 2004) published by the U.S. Geological Survey. According to this source, the near -surface geology of the area is mapped as glacial till. Glacial till typically consists of a heterogeneous, non -sorted mixture of subrounded boulders, cobbles, gravel, and sand in a matrix of silt and clay. The heterogeneous nature of the glacial till is a result of it being mixed and transported before being deposited, overridden, and compacted by the weight of an advancing glacier. The observed geology is generally consistent with the mapped geology. 2.3 FIELD EXPLORATION PROGRAM The field exploration program consisted of advancing two exploratory borings, each to about 26 ft BGS. The borings were advanced using a track -mounted, hollow -stem auger drill rig on June 25, 2014 8/19/14 Y:\043\012.010\R\Final Report\TT CoFW 304th-28th_final rpt.docx LANDAU ASSOCIATES 2-1 by Holocene Drilling, Inc. of Puyallup, Washington. Approximate boring locations are shown on the Site and Exploration Plan (Figure 2). A detailed discussion of the field exploration program, summary logs of the exploratory borings, and a discussion of the geotechnical laboratory test procedures and test results are presented in Appendix A. 2.4 SUBSURFACE SOIL CONDITIONS Based on the results of our field exploration program, the project area is interpreted to be underlain by glacial till, with up to about 6 ft of artificial fill in localized areas. Boring B-1 was advanced at the southeast corner of the intersection. At this location, the road shoulder section consists of about 6 inches of asphalt concrete pavement over 6 inches of gravel base course. Glacial till was encountered below the pavement section to the depth explored (about 26 ft BGS). Glacial till consists of very dense, damp, very sandy gravel with silt from about 1 to 31/2 ft BGS; and very dense, moist, silty to very silty, gravelly sand from 3'/2 ft BGS to the depth explored (about 26 ft BGS). Boring B-2 was advanced about 175 ft south of the intersection, in the northbound lane of 281b Avenue South. At this location, the roadway section consists of about 3 inches of asphalt concrete pavement. Soil interpreted as fill was encountered below the pavement to a depth of about 6 ft BGS. Fill consists of medium dense, moist sand with gravel and silt. Glacial till was encountered below the fill to a depth of about 23 ft BGS. Glacial till consists of very dense, damp, sandy gravel with silt from about 6 to 9 ft BGS; and very dense, moist, gravelly sand with silt from about 9 to 23 ft BGS. A zone of medium dense and wet glacial till was observed at about 15 ft BGS. Soil interpreted as advance outwash was encountered below the glacial till to the depth explored (about 26 ft BGS). Advance outwash consists of dense, moist to wet sand with silt. 2.5 GROUNDWATER At the time of drilling (June 25, 2014), a seam of perched groundwater was encountered in boring B-2 at about 15 ft BGS. Groundwater was not encountered in boring B-1. It should be noted that the groundwater conditions reported herein and on the summary logs are for the specific locations and dates indicated and therefore, may not necessarily be indicative of other locations and/or times. Furthermore, it is anticipated that groundwater conditions will vary depending on local subsurface conditions, the weather, and other factors. 8/19/14 Y:\043\012-010\R\Final Report\7T CoFW 304th-281h_final'pt.docx LANDAU AssocIATES 2-2 0 3.0 CONCLUSIONS AND RECOMMENDATIONS Based on conditions observed in the explorations and results of our engineering evaluation, construction of the proposed South 30e Street at 28 h Avenue South Intersection Improvements project is considered to be feasible using conventional means and methods. Geotechnical conclusions and recommendations are presented in the following sections for earthwork, underground utilities, stormwater infiltration feasibility, signal standard and illumination pole foundation design, pavement section, and retaining wall design. 3.1 EARTHWORK Earthwork to accommodate the proposed improvements for the project is expected to consist of site preparation (demolition of existing improvements and minor clearing, grubbing and stripping), site grading, subgrade preparation, and fill placement and compaction. 3.1.1 WET WEATHER CONSIDERATIONS Earthwork -related construction will be influenced by weather conditions. Much of the near - surface soil at the site contains a significant amount of fine sand and silt, which will make the soil moisture -sensitive. Earthwork activities involving moisture -sensitive soil should normally occur during the relatively warmer and drier period between about mid -summer to early fall. Completing these activities outside of this normal construction window could lead to a significant increase in construction costs due to weather -related delays, repair of disturbed areas, and the increased use of "all-weather" import fill materials. Because of the moisture sensitivity, unprotected site soil, in either a compacted or uncompacted state, can degrade quickly to a slurry -like consistency in the presence of water and construction traffic. If the native subgrade or fill soil becomes loosened or disturbed, additional excavation to expose undisturbed soil and replacement with properly compacted structural fill will be required. For wet weather construction, the contractor may reduce the potential for disturbance of subgrades by the following: • Protecting exposed subgrades from disturbance of construction activities by constructing gravel working mats • Using a trackhoe with a smooth -bladed bucket to limit disturbance of the subgrade during excavation • Suspending earthwork and other construction activities that may damage subgrades during rainy days ■ Limiting and/or prohibiting construction traffic over unprotected soil 8/19/14 YA043\012.010\RTina1 Report=COW 304th-28th—final rpl.docx LANDAU ASSOCIATES 3-1 • Sloping excavated surfaces to promote runoff • Sealing the exposed surface by rolling with a smooth -drum compactor or rubber -tire roller at the end of each working day and removing wet surface soil prior to commencing filling each day. 3.1.2 SITE PREPARATION Clearing and grubbing of existing vegetation within the project area should be in accordance with the requirements in Section 2-01 of the 2014 WSDOT Standard Specifications. Material generated during clearing and grubbing should be properly disposed of at an approved offsite location. Topsoil, and/or other organic -rich soil, should be stripped to expose the underlying inorganic soil. Stripped material is not considered suitable for use as structural fill. Stripped material should either be wasted off site at an approved location or stockpiled for later use as topsoil. The removal of existing improvements (e.g., existing pavement sections) should be in accordance with the requirements of Section 2-02 of the 2014 WSDOT Standard Specifications. Existing asphalt that is removed to accommodate the proposed improvements could be pulverized, stockpiled, and recycled for use as structural fill. If this alternative is chosen, the asphalt should be processed to meet the requirements in Section 9-03.21 of the 2014 WSDOT Standard Specifications. Disposal of asphalt concrete rubble at an approved offsite location is also a viable alternative. Any utilities that will be abandoned that are less than 3 ft deep should be removed and disposed of at an approved offsite location. Deeper utilities may be left in place, but should be grouted full with controlled density fill (CDF), meeting the requirements in Section 2-09.3(1)E of the 2014 WSDOT Standard Specifications, in order to reduce the potential for differential settlement resulting from collapsed pipes and/or erosion. All incidental excavations associated with the removal of the existing improvements should be backfilled in accordance with the recommendations in Section 3.1.6 of this report. 3.1.3 TEMPORARY AND PERMANENT SLOPES In order to accommodate the construction of the proposed improvements, temporary excavations may be required. Based on the soil conditions observed in our explorations, we anticipate that temporary excavations will generally encounter medium dense fill consisting of sand with gravel and silt or dense to very dense glacial till consisting of silty sand with gravel. Temporary excavations in fill should be sloped no steeper than 11/2H:1 V (horizontal to vertical). Temporary excavations in glacial till should be sloped no steeper than 1H:1V. Temporary excavation slopes exposed for more than one day should be protected by covering with plastic sheeting or other approved means to prevent erosion. Temporary excavation slopes should be the sole responsibility of the 8/19/14 Y:\043\012.010\R\FimI Report\TT CoFW 304th-28th_fiml rp4docx LANDAU ASSOCIATES 3-2 contractor. All local, state, and federal safety codes should be followed. The contractor should implement measures to prevent surface water runoff from entering excavations. All temporary excavation slopes should be monitored by the contractor during construction for any evidence of instability. If instability is detected, the contractor should flatten the temporary excavation slopes or install temporary shoring. If groundwater or groundwater seepage is present, flatter excavation slopes should be expected. All permanent cut and fill slopes should be sloped no steeper than 2H:IV. Permanent slopes should be hydroseeded as soon as practical to prevent erosion or covered with mulch, erosion control nettingiblankets, or bonded fiber matrix. 3.1.4 SUBGRADE PREPARATION Following clearing, stripping, and any required overexcavation to remove unsuitable material, and before placement of any structural fill to establish planned subgrade elevations, the upper 6 to 9 inches of exposed soil should be scarified, moisture -conditioned, and compacted as described in Section 3.1.6 of this report. The prepared subgrade should be proof -rolled with a loaded dump truck, large self- propelled vibrating roller, or equivalent piece of equipment in the presence of a qualified geotechnical or civil engineer to check for the presence of soft, loose, and/or disturbed areas. If any soft, loose, and/or disturbed areas are revealed during proof -rolling, these areas should either be moisture -conditioned and recompacted to the required density, or removed and replaced with import structural fill, meeting the requirements in Section 3.1.5 of this report, compacted to the required density. Overexcavation of unsuitable subgrade material should be in accordance with Section 2-03.3(14)E of the 2014 WSDOT Standard Specifications. Completion of a proof -roll of the compacted subgrade should be included as a special provision or as a note on the construction drawings. 3.1.5 STRUCTURAL FILL The suitability of excavated soil or imported soil for use as structural fill will depend on the gradation and moisture content of the soil when it is placed. As the amount of fines increases, the soil becomes increasingly sensitive to small changes in moisture content and adequate compaction becomes more difficult to achieve. Soil containing more than about 5 percent fines cannot consistently be compacted to a dense, non -yielding condition when the water content is greater than about 2 to 3 percent above optimum moisture content. Optimum moisture content is the moisture content at which the greatest compacted dry density can be achieved. Soil at the project site generally consists of gravel and sand with between 5 and 30 percent fines content (material passing the U.S. No. 200 sieve, by weight) and is anticipated to be moderately to highly sensitive to moisture. The onsite soil will be suitable for use as fill if placed and compacted during dry 8/19/14 Y:\043\012.010\R\Fim1 ReporATT CoFW 304th-28th_fiml rpt.doc LANDAU ASSOCIATES 3-3 weather when the moisture content can be maintained near optimum. Based on its present natural moisture content, the onsite soil is near the optimum moisture content for compaction; however, some moisture -conditioning should be anticipated in order to utilize this material as structural fill. In addition, the moisture content would be expected to increase during wetter months to percentages well above optimum. Therefore, we recommend use of onsite soil for fill be limited to the summer and early fall months, when the moisture content can be more easily controlled. Soil affected by perched groundwater may be too wet for practical moisture conditioning and therefore, not suitable for use as structural fill. The contractor should be prepared to segregate suitable from non -suitable structural fill material. If the onsite soil is utilized as structural fill, we recommend that full-time construction monitoring be provided by the City or the City's representative in order to ensure that the contractor is properly segregating suitable from non -suitable material and that the fill is being properly placed and compacted. If the onsite soil cannot be utilized for structural fill or if additional material is needed, import structural fill will be required. Import structural fill should meet the requirements for Select Borrow in Section 9-03.14(2) of the 2014 WSDOT Standard Specifications. If wet weather construction is anticipated, the amount of fines (material passing a U.S. No. 200 sieve) should not exceed 5 percent, by dry weight, based on a wet sieve analysis of that portion passing the 3/-inch sieve. 3.1.6 BACKFILL AND COMPACTION REQUIREMENTS Structural fill should be placed and compacted in accordance with Section 2-03.3(14)C, Method C of the 2014 WSDOT Standard Specifications. Compaction and moisture control tests should be done in accordance with Section 2-03.3(14)D of the 2014 WSDOT Standard Specifications. The maximum dry density and optimum moisture content may also be determined by the ASTM International (ASTM) D 1557 test procedure. 3.2 CONSTRUCTION DEWATERING Although groundwater was only observed in one of the explorations completed for this study, localized zones of shallow, perched groundwater may be encountered within excavations in areas where glacial till is present. Depending on the time of year, some construction dewatering may be required to control groundwater inflow into the excavations in these areas. The contractor should be prepared to handle groundwater seepage into the trench. It is expected that open sump pumping from the excavation where minor amounts of groundwater seepage are encountered will be sufficient, assuming the excavation walls remain stable. Wells or well points may be necessary if substantial pockets of groundwater are encountered and/or the walls become unstable. The contractor should be responsible for the design, installation, monitoring, and maintenance 8/19/14 Y:\043\012.010\R\Final Report\TT CoFW 304th-28th_6nal rpt docx LANDAU DISSOCIATES 3-4 of any required dewatering system(s). If wells or well points are necessary, the contractor should be required to submit a dewatering plan prepared by a registered professional engineer or hydrogeologist for review by the Owner prior to implementation. 3.3 UTILITY CONSTRUCTION The following sections provide geotechnical recommendations for design and construction of new site utilities. Geotechnical recommendations are included for installation of new site utilities including construction dewatering, trench excavation and retention, pipe foundation support, pipe bedding and initial backfill, trench backfill and compaction criteria, and anticipated loads on pipes. The specific trench depths were unknown at the time this report was prepared; however, the anticipated trench depths are typically not expected to be more than about 8 ft BGS. 3.3.1 TRENCHING AND EXCAVATION SUPPORT It is anticipated that excavation for the proposed underground facilities will be in medium dense fill consisting of sand with gravel and silt, and glacial till ranging from sandy gravel with silt to very silty, gravelly sand. A heavy-duty, hydraulic excavator with sufficient reach should be able to excavate the proposed trenches to the planned depths. Though not observed in our borings, cobble and boulder are often present in glacial till and the contractor should be prepared to handle and dispose of such oversized material. The final trench bottom should be firm and free of loose and disturbed soil. We suggest that a smooth -bladed bucket be used to clean the trench bottom of loose and/or disturbed soil prior to placing the bedding material. Trench excavation should conform to the requirements of Section 7-08.3(1)A of the 2014 WSDOT Standard Specifications. Actual trench configurations and maintenance of safe working conditions, including temporary excavation stability, should be the responsibility of the contractor. All applicable local, state, and federal safety codes should be followed. Temporary excavations in excess of 4 ft should either be shored or sloped in accordance with Safety Standards for Construction Work, Part N, located in Chapter 296-155 of the Washington Administrative Code (WAC). In the absence of groundwater seepage, fill and recessional outwash encountered within the trench zone classifies as Type C soil per Chapter 296-155 of the WAC. Glacial till classifies as a Type B soil per Chapter 296-155 of the WAC. The prescriptive maximum allowable excavation slope for Type C soils is 11/2H:1 V (horizontal to vertical). The prescriptive maximum excavation slope for Type B soils is 1H:1V. If groundwater seepage is present, flatter slopes, temporary shoring, and/or dewatering may be required. Trench boxes are a worker safety device but do provide some lateral support of the adjacent soil. Where a trench box is used to support excavations, one or both sides of the trench may cave against the 8/19/14 Y:\043\0l2.010\R\Fina1 Report\TT CoFW 304th-28th_final rpt.docx LANDAU ASSOCIATES 3-5 box, especially if the soil is not properly dewatered. Caving may extend out on either side of the trench for a distance approximately equal to the depth of the trench box. The potential for caving can be reduced by routing stormwater away from the excavation and limiting vehicular traffic or vibrations next to the trench. When the trench box is moved, precautions should be taken to minimize disturbance of the pipe, underlying bedding materials, and surrounding soil. Trench boxes should meet the requirements in Safety Standards for Construction Work, Part N, located in Chapter 296-155 of the WAC. Additional bracing or sheeting may be required where the near edge of the trench will be closer than 1.5 times the trench depth to settlement sensitive utilities or structures. If bracing is needed to support the trench walls, the temporary bracing system should be designed by a structural engineer licensed in the state of Washington. The parameters provided in the following table can be utilized for design of temporary shoring. Temporary shoring typically consists of steel plates with internal bracing. Surcharge loads on trench support systems due to construction equipment, stockpiled material, and vehicle traffic should be included in the design. The temporary shoring design should be submitted to the Owner for review prior to construction. RECOMMENDED SOIL PARAMETERS FOR DESIGN OF TEMPORARY SHORING Moist Unit Cohesion Internal Angle of Weight (pcf) (psf) Friction (degrees) 140 0 35 pcf = Pounds per cubic foot psf = Pounds per square foot 3.3.2 PIPE FOUNDATION SUPPORT Based on conditions observed at the exploration locations, soils at planned trench depths are anticipated to primarily consist of medium dense fill or dense to very dense glacial till. These soil types should provide adequate foundation support for the proposed utilities provided the soil remains in a relatively undisturbed condition and the trench is properly dewatered. The soil at the trench bottom can be easily disturbed by construction activities, and in a disturbed condition will generally provide poor foundation support for the pipeline. If the trench bottom becomes disturbed due to excavation and/or foot traffic during laying of the pipe, the trench bottom may need to be overexcavated to expose undisturbed foundation soil. Removal and replacement of unsuitable foundation material should be in accordance with Section 7-08.3(1)A of the 2014 WSDOT Standard Specifications. The overexcavation should be backfilled with suitable foundation material to provide a firm trench bottom. Foundation material should meet the requirements for Class A Foundation Material in Section 9- 03.17 of the 2014 WSDOT Standard Specifications. Pipe foundation material should be placed and 8/19/14 Y:\043\012A1 O\R\Final Report\TT CoFW 304th-28th_final rpt.docx LANDAU ASSOCIATES 3-6 l,1 compacted in accordance with the recommendations provided in Section 3.1.6 of this report. Alternatively, if the trench bottom is relatively free of water, CDF could be used as foundation material and should meet the requirements in Section 2-09.3(1)E of the 2014 WSDOT Standard Specifications. 3.3.3 PIPE BEDDING AND INITIAL BACKFILL To provide uniform support of buried utility pipes, the pipe should be bedded in accordance with Section 7-08.3(1)C of the 2014 WSDOT Standard Specifications and WSDOT Standard Plan B-55.20-00 (WSDOT 2013a). Because of the potential for encountering oversized material, excavated material from the trenches would likely need to be processed (i.e., all particles greater than 3 inches should be removed) in order to be suitable for use as pipe zone backfill. Therefore, we recommend that material excavated from the trench not be utilized as pipe zone backfill. Bedding material for buried utility pipes should consist of Gravel Backfill for Pipe Zone Bedding per the requirements Section 9-03.12(3) of the 2014 WSDOT Standard Specifications. Pipe bedding material and pipe zone backfill should be brought up evenly around the pipe in relatively horizontal lifts not exceeding 6 inches, and worked under the haunches of the pipe by slicing with a shovel, vibration, or other approved procedures. Pipe zone backfill should extend 6 inches above the crown of the pipe. Pipe bedding and pipe zone backfill should be compacted to at least 90 percent of the maximum dry density determined in accordance with Section 2-03.3(14)D of the 2014 WSDOT Standard Specifications. The maximum dry density may also be determined by the ASTM D 1557 test procedure. 3.3.4 TRENCH BACKFILL AND COMPACTION CRITERIA As discussed in Section 3.1.5, onsite soil may be used for trench backfill provided the moisture content can be controlled to meet compaction requirements. Alternatively, import fill consisting of Bank Run Gravel for Trench Backfill meeting the requirements of Section 9-03.19 of the 2014 WSDOT Standard Specifications could be utilized for trench backfill. Backfilling of trenches should be in accordance with the requirements of Section 7-08.3(3) of the 2014 WSDOT Standard Specifications. Trench backfill should be placed in 6- to 8-inch loose lifts and compacted to a relative density of at least 95 percent of the maximum dry density. Determination of the maximum dry density should be in accordance with the requirements of Section 2-03.3(14)D of the 2014 WSDOT Standard Specifications. Alternatively, the maximum dry density may be determined using ASTM Test Method D 1557. Flooding and/or jetting of backfill should not be used as a means to consolidate or compact trench backfill. Hand -operated compaction equipment, or other approved methods, should be used to compact the first 18 inches of trench backfill above the pipe. 8/19/14 Y:\043\012.010\R\Final Report\TT CoFW 304th-28th_final rpt.docx LANDAU ASSOCIATES 3-7 3.3.5 PIPE TYPES For pipe depths of less than 25 ft and pipe diameters of between 12 and 48 inches, the table included in Section 7-04.2 of the 2014 WSDOT Standard Specifications can be utilized to determine the appropriate sanitary or storm sewer pipe type. 3.3.6 SETTLEMENT AND BUOYANCY The net increase in bearing pressure below pipelines and manholes is generally small or negative due to the amount of soil displaced by the pipeline or structure. Therefore, provided that the pipeline/ manhole is underlain by firm, undisturbed soil, the ground surface over and adjacent to the pipe or manhole remains at about the same level prior to construction, proper compaction, and no additional load from a new structure, etc. is placed over the pipeline or manhole, we expect post -construction settlements of pipes and manholes to be negligible. The site groundwater table is deeper than the anticipated pipeline depth; so buoyancy forces on the pipeline are not anticipated. If perched groundwater is noted during construction at levels above utility pipes, we should be notified to assess the buoyancy affects of the planned pipeline(s). 3.3.7 RESISTANCE TO LATERAL LOADS Lateral resistance to forces occurring at bends in pressure conduits such as waterlines will be resisted mainly by soil friction along the length of the pipe. For concrete or coated -steel pipe and granular backfill, an ultimate interface friction angle of 22 degrees should be used. No factor of safety (FOS) is included in the interface friction values. If thrust restraint (thrust blocks) is being considered to resist lateral forces, a passive soil resistance based on an equivalent fluid pressure of 250 pcf may be used. The value for the passive resistance has been reduced by a factor of 2.0 to limit lateral deflections to less than 1 percent of the embedded depth and to make it compatible with the movement required to mobilize the soil/pipe friction. The value for passive resistance assumes that the pipeline is located above the groundwater table. 3.3.8 MANHOLES We understand that one 72-inch diameter manhole will be installed along the project alignment. Based on our field exploration program, we anticipate that the base of the manhole will be situated on dense to very dense glacial till. The manhole should be designed to withstand a lateral earth pressure equivalent to that exerted by a fluid having an equivalent fluid density of 95 pcf. To provide uniform support, the manhole should be placed on a minimum of 12 inches of bedding material as specified in Section 3.3.3 of this report. Bedding material should be thoroughly compacted into its most dense 8/19/14 Y:\043\012.010\R\FimI Report\TT CoFW 304th-28th_fim1Ipt.docx LANDAU ASSOCIATES 3-8 configuration. Backfill material placed around the manhole should meet the requirements in Section 3.3.4 of this report for trench backfill material. All backfill material should be placed and compacted in accordance with Section 3.3.4 of this report. It is expected that the manhole will be surrounded by relatively impervious glacial till. Therefore, it is possible that the backfill around the manhole will become saturated during periods of prolonged precipitation and the manhole may experience uplift pressure when empty. Uplift forces will be resisted by the dead weight (in pounds) of the manhole structure (W,,) and the friction between the walls of the manhole and the soil backfill (Ff). For a smooth -sided, concrete structure without extensions, the available frictional resistance (Ff), in pounds, can be conservatively computed using the relationship: Ff = 6.5 (H2) (P) where H is the depth to the base of the manhole below the ground surface in ft and P is the perimeter of the vault in ft. No safety factor is included in the frictional resistance. The total available forces for resisting uplift, FR (lbs) can then be calculated as: FR = Ff+ Wv 3.4 SIGNAL AND ILLUMINATION POLE FOUNDATIONS We understand that a new signal system with poles and mast arms will be installed at the intersection as part of the intersection improvements and that the signal pole foundations will be designed in accordance with WSDOT design methodology. Illumination (luminaire) poles are also being considered as part of the improvements. Based on the results of our field exploration and engineering analyses, it is our opinion that the proposed poles can be supported on drilled shaft foundations. The drilled shafts should be embedded sufficiently to resist lateral forces and the resulting overturning moments. The minimum diameter of the drilled shafts should be 3 ft. If the proposed signal pole foundations conform to the WSDOT standards for design, the foundation design chart presented on WSDOT Standard Plans J-26.10-02 (WSDOT 2013a) will be applicable for signal standards. It should be noted that the WSDOT design chart is appropriate for single - or double -mast arm standards with 90 degrees between arms. Furthermore, the "XYZ" value (summation of the wind load areas multiplied by each respective offset distance from the centerline of the standard to the center of the sign or signal display mounting location) for either a single -mast arm, or for either arm of a double -mast arm standard, must not exceed 3,000 cubic feet for the design chart to remain applicable. If the above criteria are not met, a special foundation design will be required. Landau Associates can provide appropriate soil parameters to support structural design of special signal pole foundations if the need should arise. 8/19/14 YA043\012.010\R\Final Report\TT CoFW 304th-28th_final tp4do- LANDAU ASSOCIATES 3-9 Required foundation depths and diameters will be a function of the total "XYZ" value of each mast arm, as shown on WSDOT Standard Plans J-26.10-02 (WSDOT 2013a), and the surrounding soil's allowable lateral bearing pressure. Based on conditions observed in boring B-1, dense to very dense glacial till is expected to be present at signal pole foundation locations. Assuming average to good soil conditions, an allowable lateral bearing pressure of 2,900 psf [Standard Penetration Test (SPT) blow count (1) of at least 19 blows per ft)] may be used for design of drilled shaft foundations per Table 17-2 of the WSDOT Geotechnical Design Manual (WSDOT 2013b). The embedment depth should be applied from the ground surface after stripping of topsoil, or any over -excavation of soft/loose soil deposits. Luminaire foundations can be designed utilizing an allowable lateral bearing pressure of 2,000 psf (Standard Foundation Type A). According to WSDOT Standard Plans J-28.30-02 (WSDOT 2013a), luminaire foundations should be at least 3 ft in diameter and have a foundation depth of at least 4'/2 ft for an allowable lateral bearing pressure of 2,000 psf. If the luminaire foundation is installed in slopes inclined steeper than 2H:IV, a special foundation design will be required. Signal pole and luminaire foundations shall be constructed in accordance with Section 8-20.3 of the 2014 WSDOT Standard Specifications. A qualified geotechnical or civil engineer should observe drilled shaft excavation and concrete placement. This will allow the opportunity to confirm conditions indicated by our explorations and/or provide corrective recommendations adapted to conditions revealed during construction. Standard construction methods for signal standard foundations typically involve drilling a vertical shaft with a single -flight auger rig, placing a steel reinforcing cage into the hole, and filling the hole with concrete. Cobbles and boulders are often encountered in glacial deposits; consequently, the contractor should be prepared to handle these large soil particles. Depending on ground conditions, the hole may be cased or uncased. For 3-ft diameter holes, the soil should have sufficient stand time to allow construction of the foundations without casing, although fill and/or weathered glacial deposits could be subject to caving. If casing is used, it should be pulled as concrete is placed and a sufficient head of concrete should be maintained inside the casing to prevent caving and sloughing of the hole. Alternatively, the casing could be pulled immediately after the placement of the concrete, provided the hole is topped off after the casing has been removed. 3.5 PAVEMENT DESIGN The following sections summarize the recommended flexible asphalt pavement section to be used for the proposed right-hand turn lane for northbound traffic on 28"' Avenue South. 8/19/14 Y:\043\012.010\R\FimI Report\TT CoFW 304th-28th_final rpLdocx LANDAU AssocIATES 3-10 3.5.1 RESILIENT MODULUS FOR PAVEMENT DESIGN Multiple California Bearing Ratio (CBR) tests have previously been completed on glacial till derived soil. These tests result in CBR values for a soil compacted to 95 percent of the maximum dry density are generally around 20 percent to 25 percent. Consequently, a CBR value of 20 percent is considered appropriate for subgrade soil compacted to at least 95 percent of the maximum dry density. Using the relationship given in the Pavement Interactive website (Pavement Interactive website 2009), Mr = 2,555 CBRI.14, a CBR of 20 percent is approximately equivalent to a subgrade resilient modulus (M, Value) of 17,500 pounds per square inch (psi). 3.5.2 VEHICULAR LOADING The design equivalent single axle load (ESAL) is based on traffic data provided in Tetra Tech's Traffic Analysis Report (Tetra Tech 2013). The data provided by Tetra Tech includes weekly vehicle counts with axle class breakdown, peak hour traffic counts by lane, estimated design lift (20 years), and estimated growth rate (56 percent in 20 years). This estimated growth rate corresponds to an annual growth rate of about 2.5 percent. We used these data to estimate the vehicle loading for northbound, right -turning vehicles on 28`" Avenue South. A summary of the data provided by Tetra Tech (total weekly traffic counts for 28th Avenue South) is presented in the table below: SUMMARY OF WEEKLY TRAFFIC DATA Weekly Traffic Count by Federal Highway Administration Vehicle Class Description I Class 4 Class 5 Class 6 Class 7 Class 8 Class 9 Class 10 Class 11 Class 12 28" Ave S 180 52 159 2 28 0 10 8 4 NB Traffic Turning Right 49 14 43 1 8 0 3 2 1 (27% of Total) A truck factor of 0.4 was applied to Class 4 through 7 vehicles. Similarly, a truck factor of 1.0 was applied to Classes 8 through 10 and 1.75 to Classes 11 through 13 (WSDOT 1995). After applying these truck factors to the above data and accounting for the percent of traffic in the right-hand turn lane, the daily ESAL count for the proposed new turn lane is 60 ESALs per week. Accounting for the assumed 20-year design life and 2.5 percent annual growth rate discussed above, the design ESALs (W18) is calculated to be 86,000 over the design life of the pavement (W18 = 100,000 was used in the analysis in consideration of the high percentage (99.3) of Class 1 through Class 3 vehicles using the road). Other assumptions used for pavement design include a reliability of 90 percent, a standard deviation of 0.44, an initial serviceability index of 4.2, and a terminal serviceability index of 2.5. The resilient modulus for the base course layer was assumed to be 30,000 psi. 8/19/14 Y:\043\012.010\R\FimI Report\TT CoFW 304th-28th_fim1 rpt.docx LANDAU ASSOCIATES 3-11 3.5.3 FLEXIBLE PAVEMENT DESIGN As discussed in Section 3.7.1 of this report, a subgrade resilient modulus, Mr, of 17,500 psi was assumed in the pavement design. The resilient modulus utilized in this design assumes that the upper foot of the subgrade soil is composed of silty, sandy gravel and silty, gravelly sand compacted to at least 95 percent of the maximum dry density determined in accordance with Section 2-03.3(14)D of the 2014 WSDOT Standard Specifications. This pavement design was calculated using the American Association of State Highway and Transportation Officials (AASHTO) Guide for Design of Pavement Structures (AASHTO 1993). The recommended minimum new flexible pavement design section for the 28 h Avenue South right-hand turn lane is 0.30 ft of asphalt concrete pavement over 0.33 ft of crushed surfacing material. For an arterial/collector street, the City of Federal Way Standard Plan 2-3P (City of Federal Way 2014) requires a minimum section of 0.50 ft of asphalt concrete pavement over 0.50 ft of crushed surfacing material. At boring location B-2, the existing pavement section on 28`' Avenue South was observed to consist of 0.25 ft of asphalt concrete pavement over granular fill material. Asphalt concrete should meet the requirements in Section 5-04 of the 2014 WSDOT Standard Specifications. The asphalt pavement should consist of hot -mix asphalt Class 1/2-inch. The asphalt binder should be PG 64-22. Crushed surfacing material should meet the gradation requirements in Section 9- 03.9(3) of the 2014 WSDOT Standard Specifications. The top 0.17 ft of crushed surfacing material should meet requirements for Crushed Surfacing Top Course with the remainder meeting requirements for CSBC. Prior to placing the crushed surfacing material, the subgrade should be prepared in accordance with Section 4-04.3(3) of the 2014 WSDOT Standard Specifications. Crushed surfacing material should be placed in accordance with Section 4-04.3(4) of the 2014 WSDOT Standard Specifications and compacted in accordance with Section 4-04.3(5) of the 2014 WSDOT Standard Specifications. 3.6 INFILTRATION Very dense glacial till was encountered immediately below the pavement section in one boring advanced for this project and at about 6 ft BGS in the other boring. Glacial till typically exhibits very low infiltration rates (less than 0.1 inch per hour). Additionally, at least 3 to 5 ft of relatively permeable "reservoir" soil is required below the base of any infiltration facilities for infiltration to be considered. Consequently, our initial exploration program indicates that stormwater infiltration at the site is infeasible. 8/19/14 Y:\043\012.010\R\Final Report\TT CoFW 304th-28th_final rpt.docx LANDAU ASSOCIATES 3-12 3.7 SEISMIC DESIGN CONSIDERATIONS The Pacific Northwest is seismically active and the site could be subject to ground shaking from a moderate to major earthquake. Consequently, earthquake shaking should be anticipated during the design life of the proposed improvements and the proposed improvements should be designed to resist earthquake loading using appropriate design methodology. We understand that seismic design of the proposed improvements will be in accordance with the 2012 AASHTO LRFD Bridge Design Specifications. Based on the conditions observed in the borings advanced for the project, the site would classify as Site Class C per the 2012 AASHTO LRFD Bridge Design Specifications. The following spectral accelerations for a 7 percent probability of exceedance in 75 years should be used to determine the design response spectrum per Figure 3.10.4.1-1 of the 2012 AASHTO LRFD Bridge Design Specifications (USGS website 2014): Spectral Acceleration for Short Periods (Ss): 92% of gravity (0.92g) Spectral Acceleration for a 1-Second Period (S1): 31% of gravity (0.31g) Peak Horizontal Ground (Soft Rock) Acceleration Coefficient (PGA): 41% of gravity (0.41g) The following table summarizes the values of the site coefficients that should be utilized for Site Class C: SEISMIC SITE COEFFICIENTS FOR SITE CLASS C Fa Fv Foga Site Class C 1.03 1.49 1.00 Given the dense nature of the near -surface soil and the deep groundwater table, it is our opinion that likelihood of liquefaction at the site is improbable. 3.8 CAST -IN -PLACE WALLS We understand that modifications to an existing cast -in -place (CIP) wall are anticipated to accommodate the planned improvements. This section provides geotechnical design recommendations for modifications to the existing CIP concrete retaining wall. Geotechnical recommendations for seismic design parameters are provided in Section 3.7. The subgrade for the CIP retaining wall foundation should be situated a minimum of 18 inches below the lowest adjacent grade for frost protection and for wall stability considerations. The subgrade 8/19/14 Y:\043\012.010\R\FinalRcpod\TTCoFW304th-28th_finalrptdocx LANDAU ASSOCIATES 3-13 for the wall foundation should be prepared in accordance with Section 3.1.4 of this report and the requirements of Section 2-09 of the 2014 WSDOT Standard Specifications. CIP wall foundations should have a minimum width of 18 inches and should be founded a minimum of 12 inches below the lowest adjacent final grade for frost protection. Assuming the above foundation support criteria are satisfied, continuous footings for the proposed CIP wall may be proportioned using a maximum net allowable soil bearing pressure of 3,500 pounds per square foot (psf). The allowable bearing pressure includes an FOS of at least 3 on the calculated ultimate bearing capacity. The term "Net Allowable Bearing Pressure" refers to the pressure that can be imposed on the soil at foundation level resulting from the total of all dead plus live loads (including snow loads), exclusive of the weight of the footing or any backfill placed above the footing. The maximum allowable bearing pressure can be increased by one-third for short-term transient loadings, such as wind or earthquakes. The lateral pressures that develop along the face walls are dependent on the amount the walls are allowed to rotate or yield. If the walls are unrestrained against rotating and yielding at least 0.001H, where H is the height of the wall (including embedment); the walls should be designed assuming active conditions. If the walls are restrained against rotating and yielding; the walls should be designed assuming at -rest conditions. The parameters assume there is level backfill behind the walls and wall drainage is provided as recommended in Section 3.7.4 of this report. DESIGN PARAMETERS FOR LATERAL EARTH PRESSURE CALCULATIONS Parameter Value Moist Unit Weight (ym) 130 pcf Friction Angle (tp') 36 degrees Cohesion (c) 0 Active Earth Pressure Coefficient (ka)1'1 0.26 Seismic Earth Pressure Coefficient (Kae Active Conditions)(') 0.39 Passive Earth Pressure Coefficient (kp) (2) 3.85 Notes: (1) Active lateral earth pressure coefficients assume level backfill and drained conditions. (2) Passive earth pressure coefficient is an ultimate value and has not been reduced to limit deflections. Passive earth pressure coefficient assumes ground slope is level in front of wall a distance equal to two times the embedment depth. Design of any subsurface walls should include appropriate lateral earth pressures caused by any adjacent surcharge loads. For uniform surcharge pressures due to vehicular loading, a uniforrnly distributed horizontal load of 0.26 times the surcharge pressure should be added for yielding walls (active conditions). For walls unable to rotate or translate (at -rest conditions), a uniformly distributed horizontal 8/19114 YA043\012.010\R\Fim1 Report= CoFW 304th-28th_fiml rpt.doex LANDAU ASSOCIATES 3-14 load of 0.41 times the surcharge pressure should be utilized for design. At a minimum, we recommend including a vertical surcharge load of 250 psf to account for vehicular traffic. Where large surcharge loads, such as heavy trucks, a crane, or other construction equipment will be located within a distance equal to one-half of the wall height, the abutments should be designed to accommodate the additional lateral pressures resulting from these surcharge loads. For seismic design, the horizontal earth pressure should be calculated and distributed as a single triangular pressure utilizing the seismic earth pressure coefficients provided in the above table. The resultant of the horizontal earth pressure can be assumed to act a point of/3H above the base of the wall. The horizontal earth pressure for seismic design includes both static and dynamic lateral pressures and must not be added to the static lateral earth pressure. Assuming similarly loaded foundation elements, differential settlement between two points spaced 50 ft away along the length of the wall will be '/2 inch or less. Distortion due to differential settlement along the length of the wall should be less than'/300. If the foundations are dissimilarly loaded, differential settlement and distortion may be greater than what is estimated above. Most of the settlement described above will occur when the static loads are applied. Post -construction settlements should be negligible. 3.8.1 RESISTANCE TO LATERAL LOADS Resistance to lateral loads may be assumed to be provided by friction acting on the base of footings, and by passive lateral earth pressures acting against the sides of footings. An ultimate coefficient of sliding resistance of 0.55, applied to the vertical dead loads only, may be used to compute frictional resistance. For design purposes, the passive resistance of undisturbed, glacial rill or properly compacted structural fill placed against the sides of foundations may be considered equivalent to a fluid with a density of 250 pcf. The upper 1 ft of passive resistance should be neglected in design if not covered by pavement or floor slabs. The value for the coefficient of sliding resistance does not include a factor of safety, and the value for the foundation passive earth pressure has been reduced by a factor of 2.0 to limit deflections to less than 1 percent of the embedded depth. 3.8.2 RETAINING WALL DRAINAGE Wall drainage for CIP concrete walls shall be in accordance with Section 6-02.3(22) of the 2014 WSDOT Standard Specifications. We recommend installing underdrains in general accordance with WSDOT Standard Plan D-4 8/19/14 Y:\043\012.010\R\Final Report\TT CoFW 309th-28th_final rpLdocx LANDAU ASSOCIATES 3-15 3.9 STRUCTURAL EARTH WALLS We understand that an approximately 2- to 4-ft exposed height retaining wall is planned near the southeast corner of the intersection. The wall is planned to be constructed as a structural earth wall (SEW). This section provides geotechnical design recommendations for the proposed SEW. Geotechnical recommendations for seismic design parameters are provided in Section 3.7, Modular block and mechanically stabilized earth (MSE) walls are considered to be feasible wall types to support cut slopes associated with the intersection improvements. Modular block walls rely on the combined weight of the facing units and the friction between the facing units to resist the lateral earth pressure imposed by the retained soil. In addition to the weight of the facing units and the friction between the facing units, MSE walls also utilize the friction between the geogrid or geosynthetic and the retained soil to resist the lateral loads. The facing unit is typically composed of concrete blocks or welded wire units such as those made by Tensar or Hilfiker. The principal advantages of modular block and MSE wall systems include their relatively low cost when compared to soldier pile and soil nail walls, their ability to accommodate differential settlement without loss of structural integrity, and the permeability inherent in the structure, allowing both free drainage and earth retention. A disadvantage of MSE wall systems is that they typically require a relatively large excavation area to accommodate the temporary back -cut for wall construction. While a modular block retaining wall does not require as large of a back -cut, it does require more facing units than an MSE wall. Modular block and MSE walls should be designed in accordance with the 2012 AASHTO LRFD Bridge Design Specifications. Modular block and MSE walls are often contractor designed. The design should include an evaluation of the internal stability, bearing capacity, foundation settlement, and external stability (i.e., sliding, overturning, and global stability) and be completed by a licensed geotechnical or structural engineer. The design should be submitted to the owner for review prior to construction. If desired, Landau Associates could complete the design of modular block or MSE walls. The sections below contain recommendations to be used in the wall design. 3.9.1 INTERNAL WALL DESIGN We recommend using the parameters outlined in the following table for internal design of modular block or MSE retaining walls. Walls less than 6 ft in vertical height (including embedment) may be constructed vertically. Walls higher than 6 ft should be constructed with a minimum 1H:1OV batter. To limit the potential for excessive facing deflection, which may lead to elevated stresses in the facing and the connection between the facing and the soil reinforcement, the vertical spacing of the geogrid and geosynthetic reinforcement in MSE walls should not exceed 2.7 ft (WSDOT 2013b). 9/19/14 Y:\043\012.010\R\Final Report\TT CoFW 304th-28th_final rpt.doez LANDAU ASSOCIATES 3-16 MODULAR BLOCK AND MSE WALL SOIL DESIGN PARAMETERS Soil Properties Wall Backfill(') Retained Soilizl Foundation Soil(3) Unit Weight (pcf) 135 130 135 Friction Angle (degrees) 36 35 36 Cohesion (psf) 0 0 0 Strength Limit Extreme Event State Limit State Acceleration Coefficient (g) N/A 0.41g Notes: (1) Assumes wall backfill consists of Gravel Borrow for Structural Earth Wall meeting the requirements of Section 9-03.14(4) of the 2014 WSDOT Standard Specifications (Geosynthetic Reinforcement) or Gravel Backfill for Walls meeting the requirements of Section 9-03.12(2) of the 2014 WSDOT Standard Specifications. Further assumes that wall backfill is compacted to at least 92 percent of the ASTM D 1557 maximum dry density. (2) Assumes wall retains fill or disturbed/weathered glacial till. (3) Assumes wall is founded on glacial till or import structural fill. The acceleration coefficient, A, given in the table above is based on a peak seismic ground acceleration coefficient, A, of 0.41 (USGS 2014), which is for a seismic event with a 7 percent probability of exceedance in a 75-year period (1-in-975 year event). Design of any subsurface walls should include appropriate lateral earth pressures caused by any adjacent surcharge loads acting adjacent to the wall. We recommend establishing a minimum vertical surcharge pressure of 250 psf (equivalent to typical loads from vehicular traffic) where vehicle traffic is anticipated behind the wall. Where large surcharge loads, such as heavy trucks, a crane, or other construction equipment are anticipated in close proximity to the walls, the walls should be designed to accommodate the additional lateral pressures resulting from the larger surcharge load. A smaller surcharge loading may be considered if the wall will not retain large surcharge loads or vehicular traffic. The internal stability of MSE wall systems should be designed in accordance with the requirements of Section 11.10 of the 2012 AASHTO LRFD Bridge Design Specifications. Resistance factors for internal stability of design of mechanically stabilized earth wall are provided on Table 11.5.7-1 of the 2012 AASHTO LRFD Bridge Design Specifications. For MSE walls, the minimum soil reinforcement length shall be taken as 70 percent of the wall height (the wall height includes the embedded depth of the wall) or 6 ft, whichever is greater. 3.9.2 WALL SUBGRADE PREPARATION The subgrade for the retaining walls should be prepared in accordance with the recommendations contained in Section 3.1.4 of this report. A 6 inch layer of CSBC should be placed on the properly prepared subgrade to act as a leveling pad. CSBC should meet the requirements of Section 9-03.9(3) of the 2014 WSDOT Standard Specifications and should be compacted to at least 95 percent of the 8/19/14 Y:\043\012.010\R\Final Report\Tr CoFW 304th-28th_final tpt.docx LANDAU ASSOCIATES 3-17 maximum dry density determined in accordance with Section 2-03.3(14)D of the 2014 WSDOT Standard Specifications. The maximum dry density may also be determined by the ASTM D 1557 test procedure. All prepared foundation -bearing surfaces should be free of any loose soil and water. Prepared footing subgrades should be observed by a qualified geotechnical or civil engineer to check that suitable bearing soils are present. 3.9.3 NOMINAL BEARING RESISTANCE The nominal bearing capacity of modular block and MSE walls is dependent on the depth of embedment, the equivalent footing width ff ), the slope in front of the wall, and other factors. Groundwater levels are anticipated to be well below planned foundation subgrade elevations. The base of the wall should be embedded at least 18 inches (typical height of modular block or MSE wall facing units) below the lowest adjacent site grade. The nominal bearing resistances assume there is a minimum 4 ft horizontal bench in front of the wall and the foundation is embedded at least 18 inches lower than the lowest adjacent site grade. The nominal bearing resistances [kips per square foot (ksf)] summarized on the following figure may be utilized for design of modular block and MSE walls. NOMINAL BEARING RESISTANCE FOR STRENGTH I LIMIT STATE AND EXTREME EVENT I LIMIT STATE FOR WALL DESIGN 24 22 C N Y_ d 2U C7 C y 18 d a c 16 m m 14 m c z 12 10 8 4 1 2 3 4 5 6 Equivalent Footing Width, B' (ft) 8/19/14 Y:\043\012.010\R\Final Report\TT CoFW 304th-28th_final rptdo" LANDAU AssOCIATES 3-18 design: The following table summarizes the recommended resistance factors for use in bearing capacity RESISTANCE FACTORS FOR BEARING CAPACITY AND SETTLEMENT DESIGN Limit State Resistance Factor Service Limit State 1.0 Strength I Limit State 0.55 Extreme Event I Limit State 0.80 3.9.4 FOUNDATION SETTLEMENT For modular block walls, a resistance factor of 0.45 should be applied to the nominal bearing resistance specified on the above figure for the strength limit state. A resistance factor of 0.65 should be utilized for MSE retaining walls for the strength limit state. For the extreme event limit state, the resistance factor should be set at 1.00 for both modular block and MSE walls. 3.9.5 RETAINING WALL FOUNDATION SETTLEMENT Settlement of modular block or MSE retaining walls depends on the foundation size and bearing pressure, as well as the strength and compressibility characteristics of the underlying bearing soil. Provided the foundation subgrade has been prepared in accordance with the recommendations contained in Section 3.10.2 of this report, has an effective footing width of between 1 and 6 ft, and a service load of less than 3 ksf, we estimate that total foundation settlement will be less than 1 inch. Assuming similarly loaded foundation elements, differential settlement between two points spaced 100 ft away along the length of the wall will be 1/2 inch or less. Distortion due to differential settlement along the length of the wall should be less than'/300. If the foundations are dissimilarly loaded, differential settlement and distortion will be greater than what is estimated above. Most of the settlement described above will occur as the wall is constructed. Post -construction settlements should be negligible. 3.9.6 RESISTANCE TO LATERAL LOADS Friction developed between the base of the foundation and the supporting subgrade will resist lateral loads transmitted from the wall to its foundation. Passive pressure should not be included in lateral load resistance calculations. For modular block retaining walls constructed from precast concrete units, a nominal sliding coefficient of 0.55 (NAVFAC 1982) may be used to compute the nominal sliding resistance between the soil and foundation. For MSE walls constructed with discontinuous reinforcement strips, a nominal sliding coefficient of 0.67 may be used to compute the nominal sliding resistance between soil and 8/19/14 Y:\043\012.010\R\Fim[Report\TTCoFW304th-28th_fim1rpLdocx LANDAU ASSOCIATES 3-19 foundation. If the MSE wall is constructed with continuous reinforcements, such as grids or sheets, the nominal sliding coefficient should be taken as tan (p), where p is the soil reinforcement friction angle. The angle p should not exceed 23 degrees. The nominal sliding coefficient should be applied to vertical dead loads only. For modular block walls, a resistance factor of 0.90 should be applied to the above nominal sliding resistance for the strength limit state. A resistance factor of 1.00 should be applied to the above nominal sliding resistance for the extreme event limit state. For MSE walls, a resistance factor of 1.00 should be applied to the above nominal sliding resistance for both the strength and extreme event limit state. 3.9.7 GLOBAL STABILITY Design of modular block and MSE walls shall include a global stability assessment. A global FOS of 1.0 indicates that the calculated forces driving instability are equal to the forces resisting instability (i.e., stress equals strength). Retaining walls are typically considered to be stable under permanent or sustained loading conditions (i.e., static loading conditions) if the calculated FOS is 1.3 or greater. Under seismic loading conditions, retaining walls are typically considered to be stable if the calculated FOS is 1.1 or greater. The parameters provided in Section 3.10.1 of this report should be utilized in the global stability assessment. The depth to groundwater can be assumed to be well below the ground surface elevation. Load factors for static and seismic stability analyses should be taken as 1.0 for both static and seismic stability analysis. The pseudo -static seismic coefficient, kh, should be taken as one-half the maximum wall acceleration, Am as provided in Section 3.10.1 of this report. 3.9.8 WALL BACKFILL AND DRAINAGE CONSIDERATIONS For MSE walls, wall backfill within the reinforced zone should consist of Gravel Borrow for SEW meeting the requirements of Section 9-03.14(4) of the 2014 WSDOT Standard Specifications. Wall backfill for modular block walls should meet the requirements for Gravel Backfill for Walls in Section 9- 03.12(2) of the 2014 WSDOT Standard Specifications. Backfill located greater than 3 ft from the facing elements should be placed and compacted in accordance with Section3.1.6 of this report. To avoid overstressing of the wall during placement and compaction, backfill placed within 3 ft of the facing elements should be compacted to between 90 and 92 percent of the maximum dry density as determined by Section 2-03.3(14)D of the 2014 WSDOT Standard Specifications or by the ASTM D 1557 test procedure. 8/19/14 Y:\043\012.010\R\Fim[Report\TTCoFW304th-28th_fimlrpt.do" LANDAU ASSOCIATES 3-20 Underdrain pipe for MSE or modular block walls should be 4 inches in diameter and conform to Section 9-05.2(6) of the 2014 WSDOT Standard Specifications. For MSE walls, the underdrain pipe should be located behind the reinforced zone. The pipe should be placed with the perforations downward. The pipe should be placed in a minimum 12-inch thick envelope of gravel meeting the requirements for Gravel Backfill for Drains in Section 9-03.12(4) of the 2014 WSDOT Standard Specifications. The drain gravel should completely surround the perforated drainpipe and be completely surrounded by a non -woven geotextile material with a minimum 12-inch overlap. The geotextile should meet the requirements for Moderate Survivability in Table 1 and for Class B in Table 2 of Section 9-33.2(1) of the 2014 WSDOT Standard Specifications. The top of the perforated pipe should be no higher than the top of the adjacent footing. The drain line should discharge into the storm drainage system or other approved location. To reduce the possibility of water ponding and infiltrating into the subsurface behind retaining walls, the adjacent ground surface behind the wall should be sloped to promote runoff away from the top of the wall, whenever possible. Alternatively, a line brow ditch could be constructed along the top of the wall to collect surface water runoff and route it to the storm drain system. 8/19/14 Y:\043\012.010\R\Final Report\TT CoFW 304th-281h_final ip4docx LANDAU ASSOCIATES 3-21 4.0 REVIEW OF DOCUMENTS AND CONSTRUCTION OBSERVATIONS Landau Associates recommends that we review the geotechnical-related portions of the plans and specifications for the proposed project in advance of project bidding. The purpose of the review is to verify that the recommendations presented in this geotechnical report have been properly interpreted and implemented in the design and specifications. We recommend that monitoring, testing, and consultation be provided during construction to confirm that the conditions encountered are consistent with those indicated by our explorations, to provide expedient recommendations should conditions be revealed during construction that differ from those anticipated, and to evaluate whether geotechnical-related activities comply with the project plans and specifications and the recommendations contained in this report. Such geotechnical-related activities include observation of signal pole foundation installation, roadway and wall subgrade preparation, utility trench backfill placement and compaction, retaining wall construction, and other geotechnical-related earthwork activities. The purpose of these services would be to observe compliance with the design concepts, specifications and recommendations of this report, and in the event subsurface conditions differ from those anticipated before the start of construction, provide revised recommendations appropriate to the conditions revealed during construction. Landau Associates would be pleased to provide these services for you. 8/19/14 Y:\043\012.010\R\Fina1 Report\TT COW 304th-28th_final ipt.docx LANDAU ASSOCIATES 4-1 5.0 USE OF THIS REPORT This report was prepared for the exclusive use of Tetra Tech and the City of Federal Way for the specific application to the proposed South 304`I' Street at 28t" Avenue South Intersection Improvements project. The use by others, or for purposes other than intended, is at the user's sole risk. The findings, conclusions, and recommendations presented herein are based on our understanding of the project, review of available geotechnical and geologic information in the project vicinity and on subsurface conditions observed during explorations completed on June 25, 2014. Within the limitations of scope, schedule, and budget, the conclusions and recommendations presented in this report were prepared in accordance with generally accepted geotechnical engineering principles and practices in the area at the time the report was prepared. We make no other warranty, either express or implied. There may be some variation in subsurface soil and groundwater conditions at the site, and the nature and extent of the variations may not become evident until construction. Accordingly, a contingency for unanticipated conditions should be included in the construction budget and schedule. We should be contacted if variations in subsurface conditions are encountered during construction. We appreciate the opportunity to provide geotechnical services on this project and look forward to assisting you during the bidding and construction phases. If you have any questions or comments regarding the information contained in this report, or if we may be of further service, please call. LANDAU ASSOCIATES, INC. oshua D. Elliott. P.E. Project Geo Ed Heavey, Principal JDE/EJH/jrc g—lq—1 `{ 8119l14 Y N043\012 010\R\Final Report\TT CoFW 304th-28th_final rpi docx LANDAU ASSOCIATES 5-1 6.0 REFERENCES AASHTO. 1993. Guide for Design of Pavement Structures. American Association of State Highway and Transportation Officials, Washington, D.C. AASHTO. 2012. LRFD Bridge Design Specifications. American Association of State Highway and Transportation Officials. LRFDUS-6. Booth, D.B., H.H. Waldron, and K.G. Troost. 2004. Geologic Map of the Poverty Bay 7.5-Minute Quadrangle, King and Pierce Counties, Washington. Washington Division of Geology and Earth Resources Scientific Investigations Map 2854. City of Federal Way. 2014. Standard Plan 3-2P. http://dotes.cityoffederalway.cornIWEBLINKI Browse.aspx?startid=4386I9&&dbid=0. Accessed July 3, 2014. NAVFAC. 1982. Foundations and Earth Structures — Design Manual 7.2. Department of the Navy, Facilities Engineering Command. May. Pavement Interactive website. 2009. Subgrade. http://www.pavementinteractive.org/article/subgrade/. April 2. Accessed July 2, 2014. Rocscience. 2010. Slide Computer Program. Version 5.044. Tetra Tech. 2013. S 304`h Street at 281h Avenue S Intersection Improvements — Traffic Analysis Report. December. USGS website. 2014. h=://geohazards.usgs.pov/d.esimmaps/us/application.Rhi). Accessed July 2, 2014. WSDOT. 1995. Pavement Guide — Volume 2, Pavement Notes for Design, Evaluation, and Rehabilitation. Washington State Department of Transportation. February. WSDOT. 2014. Standard Specifications for Road, Bridge, and Municipal Construction. Washington State Department of Transportation. M41-10. WSDOT. 2013a. Standard Plans. Washington State Department of Transportation. M 21-01. August 5. WSDOT. 2013b. Geotechnical Design Manual. Washington State Department of Transportation. M46- 03.09. December. 8/19/14 Y:\043\012010\R\Final Report\TT CoFW 304th-28th_final Tt.doc LANDAU ASSOCIATES 6-1 Puget y Redondo Sound` cr ea ao ¢°ape �. b �r 0 �__S=288th St- -Project Location S 304th St Steel Lake L a a t H Steel Lake Park OA 1 Federal ay viv -file Commons at Federal Way N 0 0.5 1 Miles Data Source: Esd 2012 S 304th St at 28th Ave S LANDAU Intersection Improvements ASSOCIATES Federal Way, Washington Project J Q Vicinity Map 7 _ :S -331:st-St " X� 5eaulc Spokane Federal way 7c Coma Jlympia Washington Figure 1 Puget g` Redonda Sound �� - 'IdC Va11P 4. C-- a �a s S. Project Locab i S 304th St r Steel ++ I Lake d: v� 99 Q a r y � H Steel l i Park 1 S 320th St Celebration r Park �r e� 's. ederal Jay The Commons at Federal Way N 0 0.5 1 Miles Data Source: Esd 2012 S 304th St at 28th Ave S LANDAU Intersection Improvements ASSOCIATES Federal Way, Washington Q Everett Seattle e Federal Way Spokane Tac OM Olympia Washington I Figure Vicinity Map 1 \ i s3nN3av$ / *�,, � �z APPENDIX A Field Explorations and Laboratory Testing APPENDIX A FIELD EXPLORATIONS AND LABORATORY TESTING FIELD EXPLORATIONS Subsurface soil and groundwater conditions within the limits of the project area were explored on June 25, 2014. The exploration program consisted of advancing and sampling two exploratory borings (B-1 and B-2) at the approximate locations shown on the Site and Exploration Plan (Figure 2). Both exploratory borings were advanced to a depth of about 26 feet (ft) below existing ground surface (BGS) using a track -mounted drill rig advancing hollow -stem augers. The exploratory borings were advanced by Holocene Drilling, Inc. of Puyallup, Washington under subcontract to Landau Associates. Exploratory borings were located approximately in the field by hand -taping from existing physical features referenced on a site plan provided by Tetra Tech. The field exploration program was coordinated and monitored by a Landau Associates geologist, who also obtained representative soil samples, maintained a detailed record of the observed subsurface soil and groundwater conditions, and described the soil encountered by visual and textural examination. Each representative soil type observed in our exploratory borings was described using the soil classification system shown on Figure A-1, in general accordance with ASTM International (ASTM) D 2488, Standard Recommended Practice for Description of Soils (Visual -Manual Procedure). Logs of the explorations are presented on Figures A-2 and A-3. These logs represent our interpretation of subsurface conditions identified during the field exploration program. The stratigraphic contacts shown on the individual logs represent the approximate boundaries between soil types; actual transitions may be more gradual. The soil and groundwater conditions depicted are only for the specific date and locations reported and, therefore, are not necessarily representative of other locations and times. A further discussion of the soil and groundwater conditions observed the explorations is contained in the text portion of this report. Disturbed samples of the soil encountered in borings B-1 and B-2 were obtained at frequent intervals using a 1.5-inch inside diameter Standard Penetration Test split -spoon sampler. The sampler was driven up to 18 inches (or a portion thereof) into the undisturbed soil ahead of the auger bit with a 140-pound automatic hammer falling a distance of approximately 30 inches. The number of blows required to drive the sampler for the final 12 inches (or portion thereof) of soil penetration, is noted on the boring logs adjacent to the appropriate sample notation. Soil samples collected in this manner were taken to our laboratory for further examination and testing. Upon completion of drilling and sampling, the holes were decommissioned in general accordance with the requirements of Washington Administrative Code 173-160. Both exploration locations were patched with 12 inches of quick -setting concrete. 8/19/14 YA043\012.010\R\Final Report\Tr CoFW 304th-28th final rptdocx A-1 LANDAU ASSOCIATES Soil samples obtained from the explorations will be stored in our laboratory for 30 days after the date of the final report. After that date, the samples will be disposed of unless arrangements are made to retain them. LABORATORY TESTING Natural moisture content determinations and sieve analyses were conducted in Landau Associates' laboratory on representative samples recovered from the explorations for the purpose of classification. Laboratory testing was performed in general accordance with the ASTM standard test procedures described below. The samples were checked against the field log descriptions, which were updated where appropriate in general accordance with ASTM D 2487, Standard Test Method for Classification of Soils for Engineering Purposes. Natural moisture content determinations were performed on soil samples recovered from the borings in general accordance with ASTM D 2216. The natural moisture content is shown as W=xx (percent of dry weight) at the respective sample depth in the column labeled "Test Data" on the summary logs in this appendix. Sieve analyses were performed on representative soil samples obtained from the explorations in accordance with ASTM D 422 to provide an indication of the grain size distribution. Samples selected for grain size analysis are designated with a "GS" in the column labeled "Test Data" on the summary boring logs on Figures A-2 and A-3 in this appendix. The results of the grain size analyses are presented in the form of grain size distribution curves on Figure A-4 in this appendix. 8/19/14 Y:\043\012.010\R\Final Report= CoFW 304th-28th final rptdocx A-2 LANDAu ASSOCIATES MAJOR DIVISIONS Soil Classification System uscS GRAPHIC LETTER SYMBOL SYMBOL"' TYPICAL DESCRIPTIONS 121(3) GRAVEL AND CLEAN GRAVEL D ° ° ° ° ° GW Well -graded gravel; gravel/sand mixture(s); little or no fines flr GRAVELLY SOIL (Little or no fines) Poorly graded gravel; gravel/sand mixture(s); little or no fines ° o o o ° GP 02. 0 and (More than 50%Of GRAVELWITHFINES Silty gravel; gravel/sandlsiltmixture(s) GM W E w coarse fraction retained (Appreciable amount of a $ on No. 4 sieve) fines) GC Clayey gravel; gravellsand/clay mixture(s) SW Well -graded sand; gravelly sand; little or no fines SAND AND CLEAN SAND u1 m N t SANDY SOIL (Little or no fines) Poorly graded sand; gravelly sand; little or no fines SP `m Q (More than 50 % of I SAND WITH FINES fraction Silty sand; sand/silt mixture(s) SM B coarse passed (Appreciable amount of through No. 4 sieve) fines) sand; sand/clay mixture(s) SICClayey � MMILIn anic silt and very fine sand; rock flour; silty or clayey fine sar or clayey silt with slighl plasticity ❑ o r _ N "' SILT AND CLAY Inorganic day of low to medium plasticity; g y p ty; gravelly Gay; sandy clay; silty day; lean clay CL m �m � � � (Liquid limit less than 50) Organic silt; organic, silty clay of low plasticity QL MH Inorganic silt; micaceous or diatomaceous fine sand m SILT AND CLAY UJ es Z CH Inorganic clay of high plasticity; fat clay Z E LL (Liquid limit greater than 50) Organic clay of medium to high plasticity; organic silt OH HIGHLY ORGANIC SOIL PT Peat; humus; swamp soil with high organic content GRAPHIC LETTER OTHER MATERIALS SYMBOL SYMBOL TYPICAL DESCRIPTIONS PAVEMENT C Or PC Asphalt concrete pavement or Portland cement pavement ROCK RK Rock (See Rock Classification) WOOD 10 WD Wood, lumber, wood chips DEBRIS DB Construction debris, garbage Notes: 1_ USCS letter symbols correspond to symbols used by the Unified Soil Classification System and ASTM classification methods. Dual letter symbols (e.g., SP-SM for sand or gravel) indicate soil with an estimated 5-15% fines. Multiple letter symbols (e.g., MLICL) indicate borderline or multiple soil classifications. 2. Soil descriptions are based on the general approach presented in the Standard Practice for Description and Identification of Soils (Visual -Manual Procedure), outlined in ASTM D 2488. Where laboratory index testing has been conducted, soil classifications are based on the Standard Test Method for Classification of Soils for Engineering Purposes, as outlined in ASTM D 2487. 3. Soil description terminology is based on visual estimates (in the absence of laboratory test data) of the percentages of each soil type and is defined as follows: Primary Constituent: > 50% - "GRAVEL," "SAND," "SILT," "CLAY," etc. Secondary Constituents: > 30 % and < 50%- "very gravelly," "very sandy," "very silty," etc. > 15% and < 30% - "gravelly," "sandy," "silty," etc. Additional Constituents: > 5% and < 15%- "with gravel," "with sand," "with sift," etc. <, 5 % - "with trace gravel," "with trace sand," "with trace silt," etc., or not noted. 4. Soil density or consistency descriptions are based on judgement using a combination or sampler penetration blow counts, drilling or excavating conditions, field tests, and laboratory tests, as appropriate. Drilling and Sampling Key SAMPLER TYPE SAMPLE NUMBER & INTERVAL Code Description a 3.25-inch O.D., 2.42-inch I.D. Split Spoon b 2.00-inch O.D., 1.50-inch I.D. Split Spoon c Shelby Tube d Grab Sample e Single -Tube Core Barrel f Double -Tube Core Barrel g 2.50-inch O.D., 2.00-inch I.D. WSDOT h 3.00-inch O.D., 2.375-inch I.D. Mod. California i Other - See text if applicable 1 300-lb Hammer, 30-inch Drop 2 140-lb Hammer, 30-inch Drop 3 Pushed 4 Vibrocore (Rotosonic/Geoprobe) 5 Other - See text if aoaiicable Sample idenlification Number Recovery Depth Interval 1� �~ Sample Depth Interval Portion of Sample Retained for Archive or Analysis Field and Lab Test Data Code Description PP = 1.0 Pocket Penetrometer, tsf TV = 0.5 Torvane, tsf PID = 100 Photoionization Detector VOC screening, ppm W = 10 Moisture Content, % D = 120 Dry Density, pcf -200 = 60 Material smaller than No. 200 sieve, % GS Grain Size - See separate figure for data AL Atterberg Limits - See separate figure for data GT Other Geotechnical Testing CA Chemical Analysis Groundwater a Approximate water level at time of drilling (ATD) _Y Approximate water level at time other than ATD S 304th St at 28th Ave S Figure 14 LANDAU Intersection Improvements Soil Classification System and Key A _ 1 ASSOCIATES Federal Way, Washington /`1 5 10 B-1 LAI Project No: 0043012.010 SAMPLE DATA SOIL PROFILE Moisture Content (%) wee Liquid Lind �--�—I Limit 10 20 30 40 -0 m 6 -0 o Drilling Method:- Hollovv-Stem Auger A SPT N-Value A _ $ d a � o E a a E Ground Elevation ft : 456 Project Datum () , Non -Standard N-Value n, 20 40 60 80 Z n a y �a o <n n > U) Drilled By: Holocene Dnflin Ine 3 X Fines Content (%) X E m o a `� rn Logged By: DAR Date: O6/25/14 ° (9 10 20 30 40 w rn oa r4 no H t7 AC Asphalt Cement Concrete (6 inch} (ASPHALT) p GW GRAVEL basecourse (6 inches) (medium GP GM dense, moist) (FILL) 455 S1 b2 60 W — 2 Brown, very sandy GRAVEL with silt (very 3ov X GS SM \ dense, damp) �/ 8 \ (GLACIAL TILL) w Brown, silty to very silty, gravelly, fine to z° coarse SAND (very dense, moist) S-2 b2 67 W = 7 3 3 A 2 (7 - 450 S3�I b2 501 W=8 5" GS 445 15 S 4� b2 501 5.5" 440 1— 20 - 435 S•51 b2 80 W = 5 - grades to brownish -gray - grades to gray 25 S6b2 501 W=g 5.5" n a _ Boring Completed 06125114 7 Total Depth of Boring = 26.0 ft. n ° Notes: 1. Stratigraphic contacts are based on field interpretations and are approximate. 2. Reference to the text of this report is necessary for a proper understanding of subsurface conditions. 3. Refer to "Soil Classification System and Key' figure for explanation of graphics and symbols. a S 304th St at 28th Ave S LANDAU Intersection Improvements Log of Boring B-1 ASSOCIATES Federal Way, Washington 0 5"1 • A • Figure A-2 B-2 LAI Project No: 0043012.010 SAMPLE DATA SOIL PROFILE Moisture Contentsfic Pla Liquid Limit Limit L'unit _ 10 20 30 40 a� o Hollow -Stem Auger o Drilling Method: g A SPT N-Value A E � a l _ '^ ° E a -0 E Ground Elevation (ft): 452 (Project Datum) 10 0 Non -Standard N-Value 4, _ _ 2 aa) m m � t� ca m ❑ rn o > CO Drilled By: Holocene drilling fhC. 3 20 40 60 80 r 16 a a rn a X Fines Content (%) X a)-22 m m � a `� U5 Logged By: DAR Date: 06/25/14 2 ❑ w cn oa (n m r C0 LJ 10 20 30 40 0 AC Asphalt Cement Concrete (3 inches) SP- (ASPHALT) SM Brown, fine to coarse SAND with gravel and 450 sift (medium dense, moist) (FILL) S-1 b2 14 5 S-2 b2 25 445 50/ W = 2 S-3 I"r b2 5" GS 10 S4 b2 50/ W = 6 [440 �[ 15 S-5 I b2 17 20 $8" 4" b2 50/ [430 -1— 25 GM (very dense, damp) (GLACIAL TILL) SP- Grayish -brawn, gravelly, fine to coarse _ — SM SAND with slit (very dense, moist) - grades to medium dense and wet, perched water seam at about 15 ft BGS - grades to very dense and moist SP- Brownish -gray, fine to medium SAND with SM sift (dense, moist to wet) (ADVANCE OUTWASH) A A 50/ 5„ X 501 5.. ❑ - 0 eri Q 5 7 I b2 34 I WGS 7 a Boring Completed 06/25/14 'o Total Depth of Boring = 26.5 ft. ° Notes: 1. Stratigraphic contacts are based on field interpretations and are approximate. 2. Reference to the text of this report is necessary for a proper understanding of subsurface conditions. 3. Refer to "Soil Classification System and Key'figure for explanation of graphics and symbols. S 304th St at 28th Ave S [A LANDAU Intersection Improvements Log of Boring B-2 ASSOCIATES Federal Way, Washington X • 501 I 4" 1 Figure A-3 \� E Q 2 0 ocn f ao a � t � \ 0 D E .§ � I . � \ \ iz mf§ _ IE� < ) , �G2 _ E 7 f �}c K &� ; } \ ) / ( \ \ \ \ \ �/ .LD) ° eQ E = gf / C/i_ , a \ § } j 2 c) " _ w- o E �$ƒ /}fE 2 ) 4 $ $ U- - _ m 2 ƒ kf -- — \ > \¥ ) \ \ \ \ _ ] I - EE ) m G m $ w $ _ » ]p � \ � � 4 � $ )b _ wo E14� o) Coxz � - E e H * c r- G 2 $ m � ° /= !e�@»a _uOJBd 0 7� � A C D E G H A 5 3 SHEET INDEX SHEET NO DWG NO SHEET TITLE City of Federal Way Public Works Department Federal Way, Washington S 304TH STREET AT 28TH AVE S INTERSECTION IMPROVEMENTS DECEMBER 2013 CITY OF Federal Way CITY OF FEDERAL WAY NO: 1 G-01 TITLE AND INDEX SHEET 2 G-02 LEGEND AND ABBREVIATIONS 3 C-01 SURVEY CONTROL PLAN 4 C-02 ALIGNMENT AND RIGHT OF WAY PLAN 5 C-03 SITE PREP AND EROSION CONTROL PLAN 6 C-04 TEMPORARY EROSION CONTROL DETAILS (PENDING) 7 C-05 ROADWAY PROFILES 8 C-06 ROADWAY SECTIONS 9 C-07 PAVING PLAN 10 C-08 PAVING DETAILS 11 C-09 DRAINAGE PLAN 12 C-10 DRAINAGE PROFILES (PENDING) 13 C-11 DRAINAGE DETAILS (PENDING) 14 C-12 ILLUMINATION PLAN AND DETAILS 15 C-13 PAVEMENT MARKING AND SIGNING PLAN 16 C-14 TRAFFIC SIGNAL PLAN 17 C-15 SIGNAL NOTES AND WIRE SCHEDULE 18 C-16 WIRE DIAGRAM (PENDING) 19 C-17 SIGNAL POLE DETAILS 20 C-18 RETAINING WALL PLAN, PROFILES AND DETAILS (PENDING) 21 C-19 CONSTRUCTION STAGING PLAN (PENDING) 0AM DECEMBER 2013 DESIGNED: AA DRAWN: AA CHECKEIX 50 APpRDyEO" SO AEY OAIE DES CHECK APPKhyk$ REMSION R'"✓-1 -; . 12)C `1, J S 30M PL ul 02 co Ai AST N 7-1171 S 304TH S7FiEET PROJECT J LOCATION STEEL LAKE m N N VICINITY MAP NTS RECEIVED AUG 2 8 2014 CITY OF FEDERAL WAY CALL 2 DAYS CDS BEFORE YOU DIG [NOT1-800-424-5555 FOR CONSTRUCTION RLE® TETRA TECH DRAFT S 304TH ST AT 28TH AVE S PRO ECT CITY OF INTERSECTION IMPROVEMENTS PROJECT No: 13-042 '°w°`Wamcn�"' SUBMITTAL -~ Federal Way DWG N0: 0-01 400 112TH AVE NE"SUITE OLa 8ELLEWLWA9e004 TITLE AND INDEX SHEET SHEET: 1 OF 21 PHONE: 425E35-1000 FAX: A2`.�-63SA1W 5 4 3 2 This drawing is lull size when 22 x 34 or is reaucea to non size wn— i i x i i 5 4 3 A r r�rurl ITEM ASPHALT CONCRETE EDGE OF PAVEMENT CATCH BASIN STORM MANHOLE SANITARY MANHOLE WATER METER WATER VALVE FIRE HYDRANT GAS VALVE GAS METER TELEPHONE RISER UTILITY POLE UTILITY POLE ANCHOR TRAFFIC JUNCTION BOX STREET LIGHT ASSEMBLY ELECTRICAL JUNCTION BOX SERVICE CABINET CONTROLLER CABINET POWER VAULT TELEPHONE MANHOLE FIBER OPTIC MANHOLE FIBER OPTIC SPLICE VAULT SIGN POST - SINGLE SIGN POST - DOUBLE TYPE 1 LOCKING JUNCTION BOX TYPE 2 LOCKING JUNCTION BOX TYPE 8 LOCKING JUNCTION BOX CONDUIT EXISTING B3 wu ID Gv ®u orm T'-6 C.-is a O FO FO d �Q 3 � PROPOSED 0 ZL fl C LEGEND (CONTINUED D ITEM EXISTING WATER LINE W STORM SEWER LINE SD SANITARY SEWER LINE sS BURIED POWER LINE BP GAS LINE BURIED FIBER OPTIC LINE BFD BURIED TELEVISION CABLE BTV BURIED TELEPHONE LINE BT OVERHEAD POWER P DECIDUOUS TREE olo, CONIFEROUS TREE - WETLAND FLAG P ESA WETLAND IN FLAG B WETLAND BOUNDARY WL WETLAND BUFFER WB - WETLAND - CREEK/DITCH CENTER LINE STORM DRAIN CULVERT (< 24"0) (LESS THAN 24"0) STORM DRAIN CULVERT (24"0 AND LARGER) SILT FENCE HIGH VISIBILITY FENCE CATCH BASIN PROTECTION WATTLES RETAINING WALL CURB RAMP PARALLEL CURB RAMP PERPENDICULAR CURB RAMP GUARD RAIL FENCE TEMPORARY FENCE MONUMENT CONTROL POINT CENTER LINE RIGHT OF WAY PROPERTY LINE TEMPORARY CONSTRUCTION PERMIT STATE/COUNTY/CORPORATE LIMIT SAWCUT LINE FILL LIMIT CUT LIMIT MINOR CONTOUR MAJOR CONTOUR POTHOLE SECTION LINE MID -SECTION LINE }------ { �--:=- ---- -_� xx- 74 — — 8D— — E PROPOSED _SD SF HVF o P'A046, n.„ n -x-x-- F C 74 s0 BP3, G ABBREVIATIONS ACP ASPHALT CONCRETE PAVEMENT ATE) ASPHALT TREATED BASE APPROX APPROXIMATE B/C BACK OF CURB BFB BOTTOM FACE OF BLOCK (AT GROUND) BL BIKE LANE B/O BLACK ON ORANGE B/W BLACK ON WHITE CB CATCH BASIN CFW CITY OF FEDERAL WAY CI CAST IRON CL, CL CENTER LINE CPR CORRUGATED POLYETHYLENE PIPE CSBC CRUSHED SURFACING BASE COURSE D DEGREE DET, DTL DETAIL DI DUCTILE IRON DLC DETECTOR LOOP CABLE DWG DRAWING E ELECTRIC UTILITY EA EACH EL, ELEV ELEVATION EM ELECTRIC METER EP EDGE OF PAVEMENT EX, EXIST EXISTING EXT EXTRUDED FG FINISHED GRADE FL FLOW LINE GM GAS METER GV GAS VALVE HMA HOT MIX ASPHALT HVF HIGH VISIBILITY FENCE HYD FIRE HYDRANT IE INVERT ELEVATION JB, J-BOX JUNCTION BOX LF LINEAL FOOT LS LUMP SUM LT LEFT MAX MAXIMUM MIN MINIMUM MH MANHOLE MON MONUMENT H N NORTH NEIL NORTH BOUND LANE NO., g NUMBER NST NO STEEPER THAN N T.S. NOT TO SCALE PC POINT OF CURVATURE PERF PERFORATED PROP PROPOSED PP UTILITY POLE PT POINT OF TANGENCY PVC POLYVINYL CHLORIDE RCP REINFORCED CONCRETE PIPE RP RADIUS POINT RT RIGHT ROW, R/W RIGHT-OF-WAY S SOUTH, SLOPE SBL SOUTH BOUND LANE SD STORM DRAIN UTILITY SDMH STORM DRAIN MANHOLE SDP STORM DRAIN PIPE SDR STANDARD DIMENSION RATIO SERV SERVICE SF SILT FENCE SHT SHEET SPEC SPECIFICATIONS) SS SANITARY SEWER UTILITY SSMH SANITARY SEWER MANHOLE SSP STORM SEWER PIPE STD STANDARD STA STATION T, TEL TELEPHONE UTILITY TELMH TELEPHONE MANHOLE TFB TOP FACE OF BLOCK TS TRAFFIC SIGNAL TWLTL TWO WAY LEFT TURN LANE TYP TYPICAL UDP UNDERDRAIN PIPE VC VITRIFIED CLAY W WATER UTILITY W/ WITH WM WATER METER WSDOT WASHINGTON STATE DEPT. OF TRANSPORTATION WV WATER VALVE CONSTRUCTION NOTE SYMBOL LEGEND r SECTION NUMBER `i DRAWING ON WHICH SECTION/ELEVATION APPEARS DETAIL NUMBER DETAIL A PLAN ON WHICH SECTION SCALE: NTS C-01� WAS CUT a TETRA TECH DRAFT CNY OF 4Bo„xrHA1°SUREbao SUBMITTAL Federal Way BELLEVUE. WA 98004 PHONE e26S3S•11 WD PAX 425635-1150 CALL 2 DAYS BEFORE YOU DIG NOT FOR CONSTRUCTION 1-800-424-5555 S 304TH ST AT 28TH AVE S CT PROJEN0: CT INTERSECTION IMPROVEMENTS PROJECT Q 1- 42 DWG NO: —02 LEGEND AND ABBREVIATIONS SHEET: 2 OF 21 5 4 3 This drawing is lull size when 22 x Ja or is reaucea to nan sae wren ii xi A B ^} C T. 21N. R. 4E. W.M. D E 6 �. H 5 n 3 SEC. 4 21+00 ^� cP-zo7 cP-too _I 22+00 23+00 - { -S87' 45' 30.1 "E 4+00 - 25 F 0 B_ LINE 26+00 FA 1 + 1.. TA 4 S2 17 SURVEY CONTROL POINT NUMBER NORTHING EASTING STA/OFFSET POINT ELEVATION DESCRIPTON CP-200 123671.76 1277357.03 B 24+65.60, 4.21' LT 456.84 SET PK NAIL CP-201 123622.98 1277788.32 B 28+98.47, 27.66' RT 460.83 SET PK NAIL CP-203 123632.76 1277624.31 B 27+34.21, 24.31' RT 462.15 SET PK NAIL CP-204 123229.73 1277327.32 A 12+26.82. 14.60' LT 441.40 SET PK NAIL CP-206 123522.37 1277337.43 A 15+19.62. 12,18' LT 453.71 SET PK NAIL CP-207 123675.28 1277159-93 B 22+68.52, 0.01' LT 444.13 MONUMENT IN CASE S 304TH STFEET B S 2+ 52+ C STA+ 7 B STA 25+35.57, 22.00' RT I 00 S87' 45' 30.1 "E f PT o B STA 25+28.57. + I m 22.00' RT Iw w� a? w ? o PC o A STA 16+07.68. C-4 i 30.66' RT OI M U N z IZ CP-206 I a �T S8808' 30.0"E 00 S62' 15' WE O--LINE + #0.' O TA 4 + A STA 15+04.40� I A,P, D STA e0+40.02 w co? I I� W S a Q 7 N172' 14' 05"E O CP-204 DATE- OECEMBER 2010 DESIGNEO_ WR DRAWN AA CHECKED_ SO REV 0.A1E 7E5 cwcg APPROVALS I KMSDN DMAP110N APPRDVED- SO O I + C STA 50+00.00= A STA 14+33,78. 19.40' RT TETRA TECH w+V.VAaaaald�,aaa1 4001127H AVE NE, SUITE AM OaLEVVE. WA 98004 PHONE: 425-635-1000 FAX:425-1I354150 27+00 _ t_ S. 4. T. 21N. R. 4E. W.M. 28+00 S. 9. T. 21N. R. 4C-W.M - CP-203 SEC. 9 29+00 `c CP-201 30+00 20 0 20 40 SCALE IN FEET DATUM AND BASIS OF BEARING HORIZONTAL DATUM: WASHINGTON COORDINATES, NORTH ZONE (BASED UPON NAD 83/11)- A M VERTICAL DATUM: NAVD 88 CONTROL METHOD: HORIZONTAL AND VERTICAL CONTROL COORDINATES WERE DERIVED USING A COMBINATION OF STATIC GLOBAL POSITIONING SYSTEM (GPS) PROCEDURES AND FROM TRIGONOMETRIC TRAVERSE METHODS USING A LEICA TPS-1201 TOTAL STATION. WASHINGTON STATE DEPARTMENT OF TRANSPORTATION (WSDOT) SURVEY CONTROL POINTS GP17005-82 AND GPI7005--83 WERE USED AS PRIMARY GPS BASE STATION CONTROL. SURVEY NOTES: FIELD SURVEY PERFORMED OCTOBER. 2013. THE RIGHT OF WAY SHOWN WAS DEVELOPED USING THE BREAKDOWN FOR THE NORTHEAST QUARTER OF SECTION 9, T21N, R4E AS SHOWN ON SHEET 4 OF THE RETRACEMENT OF THE RIGHT OF WAY BASE LINES FOR SR-5, AS PERFORMED BY INCA ENGINEERS INC, AFN 20030305900008, RECORDS OF KING COUNTY, WA, AND TIED TO MONUMENTS FOUND IN THE FIELD, THE NORTH LINE OF SECTION 9 WAS HELD FOR THE CENTERLINE OF S. 304TH STREET AND THE NORTH -SOUTH 16TH LINE OF SAID NORTHEAST QUARTER WAS HELD AS THE CENTERLNE FOR 28TH AVENUE S. THE DIMENSIONS FOR PARCELS 092104-9091, 092104-9236. AND 092104-9322 ARE BASED UPON TITLE REPORT LEGAL DESCRIPTIONS. OTHER PARCELS SHOWN ARE BASED UPON THE KING COUNTY GIS DATABASE AND WERE ROTATED AND TRIMMED TO FIT CALCULATED RIGHT OF WAY LINES. SAID PARCEL LINES AND DIMENSIONS ARE APPROXIMATE AND HAVE NOT BEEN SURVEYED. CALL 2 DAYS BEFORE YOU DIG NOT FOR CONSTRUCTION 1-800-424-5555 S 304TH ST AT 28TH AVE S PROJECT ECLE T P DRAFT CRYOF INTERSECTION IMPROVEMENTS PRON0: 13-042 SUBMITTAL Federal Way SURVEY CONTROL PLAN DWG NO: C-01 SHEET: 3 OF 21 5 4 2 This drawing is full sae when 22-x 34' or is reduced to hall size When 11 zI r G H A L I I � j I I I I j s 1 4 3 Ii1 SEC. 4 C 0 T. 21N. R. 4E. W.M. 1 � I I � I � I I RIGHT-OF-WAY I L-------- -\--------L-----�-- 23+00 ® — _ + S87' 45' 30"E RIGHT- ---------"---- —WAY• i i E I I -_ 1_ ___---- A STA 16+65.31= S 304TH STREET B STA 24+62.17 24+00 _ _ ++ - 25+00 B-LINE _ 26+DO PT -I I B STA 25+28.57, 52+38 C STA 52+37.55= 22.00' RT _ L B STA 25+35.57, 22.00' RT I ryI Z II I I � Z / I +I I I I `I W J ZI n� / I / I w / 1 Z " �I / I I + / I un L30' 30' I ^I I 00 p_LINE I + sad ua"E 411 T 4 = ^2 I A STA 15+04.40 I I JJ1 41 I I D I I I I I I C STA 5 + A STA 14+33.78, 19.40' RT 0 i ++ � I I I II DATE: DECEMBER 2013 DESIGNED: MJR DRAWN. AA GHCCXE07 50 APPROVED: SO REV aArf DES CHECK APPROVALS EP R5KIR DESCRIPTION S87' 45' 30"E —---------- f i4 35.0' B STA 25+46.84, 35 00' RT B STA 26+25.63, -B STA 25+3&64, 35.00' RT 1 41.00' RT I A STA 16+23.64, Ill 52,06' RT A STA 16+06.46. 43.65' RT 092104-9236' I KATHLEEN A. & PC ANTHONY RUSICH A STA 16+07.88, 30.66' RT I I A STA 15+47.02. 43.29' RT A STA 15+21.28. 43.13' RT A STA 15+21.19, �58.13' RT 092104-9091 I JONATHAN DEBEB A.P. D STA 40+40 02 S62' 15' 50"E %6D i I A STA 14+86.19, I - 57.91' RT A STA 14+86.28. 42.91' RT _ A 5T�+77.02, - - 42.86' 1RT I A STA114+70.75, 1 29.82' i T ill EXISTING SEWER MAIN EASEMENT 1 I 092104-9322 f 1 PETER D.WONG & JI �. TAM VINCENTE 1 I I 1 EXISTING 15' ROAD i & UTILITIES EASEMENT Ij A STA 13+77. 2, 42.24' RT a TETRA TECH WwwJWmkk aiumn 112TH AVE W-8UTT'E4a0 BELLEVUE. WA 98004 '&.law FAlC'42S{85_ 1150 27+00 S 4, T 21N. R 4E. W.M S 9, T 21N, R 4E+W;M. --------r�— --------_.------- 1 I I I NOTES I I 1. SEE SURVEY OF BEARING, POINTS. 1 2 SEE SURVEY I ESTABLISHIN 1 I 1 SEC. 9 1 i 1 1 1 l 1 l CALL:2 DAYS BEFORE YOU DIG [N-(1-800-424-55b5 20 0 20 40 SCALE IN FEET CONTROL PLAN FOR BA51S MONUMENTS AND CONTROL G CONTROL PLAN FOR ALIGNMENTS. T FOR CONSTRUCTION S 304TH ST AT 28TH AVE S DRAFT CrTYOF INTERSECTION IMPROVEMENTS SUBMITTAL Federal Way ALIGNMENT AND RIGHT OF WAY PLAN FlLE NO: PROJECT NO: 13-042 Ir6G N0: C_02 SHEET: 4 OF 21 5 4 2 This drawing is lull size when 22"x 34- or is reduced to naa s,ze wnen II zIr A S C 0 E G A,H 5 4i 3 I I � I I 04 y I C� r - 5-?;� \` CAS �*Krj � f GENERAL SITE PREPARATION NOTES 1. PRESERVE AND PROTECT ALL IMPROVEMENTS THAT ARE TO REMAIN 2. FOR MODIFICATIONS TO EXISTING ROADWAY SIGNING, SEE SIGNING PLAN 3. FOR MODIFICATIONS TO EXISTING STORM DRAINAGE SYSTEM, SEE DRAINAGE PLAN T. 21N. R. 4E. W.M. I I I r SEC. 4 1 r r r r I 3 e'SrwC�aE r} In UF] a j ` NSAt OKI _ I I it I C 3 BE( I +- I � %ner � I TAX LOT 092101-92]5 4 BEQN r 5 'I TAX LOT 092104-9091 ■ li�1{ I l �� 401,00 r I . a ■ i r 1 to ��I � --� _ • DATE: DECEMBER 2013 DESIGNED: NW DRAWN: AA CHECKED: SO APPROVED: SO REV DATE DES CNECR APPROVALS REVISION DESCRIPTION � 1 1 r 1 r 1 2 BEGIN 1 ITAX LOT 092101-9322 1 ® TETRA TECH DRAFT ww'N."IrY111 400 712TH AVE HE, rtE 400S U B M I TTA L 54rTE +DO BELLEVUE, WA 90004 I I r r 20 0 20 40 I I SCALE IN FEET S' ST WA -� WAT[R MR VAC 51 u �$ SITE PREPARATION NOTES I V f L ��N " Q1 VERTICAL SAWCUT REMOVE HMA _ I ] 2..END Q3 REMOVE ROCKERY REMOVE WOOD FENCE 3 ::EN()' ` RELOCATE UTILITY POLE (BY OTHERS) RELOCATE WATER METER GAS CABLE r SEC 9 EROSION CONTROL NOTES Q INLET PROTECTION (EXISTING CATCH BASIN) O HIGH VISIBILITY FENCE Q3 INLET PROTECTION (PROPOSED CATCH BASIN) LEGEND C CUT LIMIT F FILL LIMIT Hvr HIGH VISIBILITY FENCE / CLEARING LIMIT ® INLET PROTECTION (EXISTING CATCH BASIN) No INLET PROTECTION (PROPOSED CATCH BASIN) - - - SAWCUT X REMOVE TREE ® REMOVE EX. SURFACING CALL 2 DAYS BEFORE YOU DIG NOT FOR CONSTRUCTION 1-800-424-5555 ALE S 304TH ST AT 28TH AVE S PROJECT CITY OF INTERSECTION IMPROVEMENTS PROJECT N0: 13-042 Federal Way SITE PREP AND EROSION CONTROL PLAN DWG NO: C-03 SHEET: rj OF 21 5 e 3 2 This drawing is full size when 22""X 34- or is reduced 10 hair sae when II XIJ .� A r'll ■ f3 —�� C Q E G � H I I I ��- - o o n g n k I. . Io .. ...I O i ;' a 'm a CY u'1 —I- I(i p n V U'1Y• a a a li _ QQ I d P a [Mp ~Y�'1 N Nm �lil to �0 N 7 a � F5� aw ° y a" aroma a° a Q pQ N' f" un u a w- �} q a. W tn Ulp a 1 r"4 aw � ��_.. - 3:4"L% - a aw m - 2-50% 5.� l poi vim a w 5 a w Ex1S NG / r r 40� 2• EXIS NG-4ROti Q -- - 1-- - SONJ -_ --- - - - - — -- �- - - - --p jr 1 ... g; 1 PROPG SEEQ -4-2- I f PRQPMeD GRADE --- §• 50%- PAODEIJNDL E7I5TrGROUND- gROPOS4 EDRADE -- - 41 - LIP, - I I �iT .. ___.pl $______. .V .r-�.e<y;$--._...�.;s - �_-__-K•I , "'+� rn, c� it I" S 07[ [?i �• �'7 rF a r -� a0 oo ff+ '�la F'1 �� I u'i '�'Iun �. d Ev ?j .` �! ptv Vice �� ' I0 f d a1� 50+00 5D�0 57-C1:� 51+SG 52+00 52t5G 4tl+00 40►50 C-LINE D-LINE CURB LINE SE DRIVEWAY 3 P V ae[E 1 DES I CHECK I APPROVALS I 11 V5" DESCRIPTION This drawing is full size when 22"K 34" or is reduced to half size when 11"07" DATE: DECEM9ER 2013 N TETRA TECH DRAFT CITYOFDRAWN: DESIGNED: MJR AA wwwtelretechcom 400 SUBMITTAL w_ . Federal Way I'HECKED: SO 400 112TH AVE NE, SUfTE BELLEVUE. WA 9e004 APPROVED: SO PHONE: 425-63s1nnO FAX:425-635-1150 - 20 0 20 40 HORIZ: SCALE IN FEET 5 0 5 10 VERT; SCALE IN FEET CALL 2 DAYS BEFORE YOU DIG [NOT FOR CONSTRUCTION 1-800-424-5555 S 304TH ST AT 28TH AVE S FILE CT PROJEEN0: CT INTERSECTION IMPROVEMENTS 13-042 ROADWAY PROFILES DWG NO: C-05 SHEET: ] OF 21 5 4 3 2 A 6 G D E a ■ G H 5 n 3 q_ NOTES: A—UNE 1O SURFACING DEPTHS TBD i�AR,Ls Q2 BLOCK OR ROCKERY WALL TBD 3 PR t EE C-LINE CURB PROFILE LANE LANE LANE BIKE SIDEWALK WALL/ UTILITY _r EX. GROUND EX. CROWN r — j EXISTING - �-VARIES - 1% � WALL TYPE TBD EX ROADWAY J a w xx N' `uY> XX 1 xX 4 l XX 2 XX 5 7 SECTION A 28TH AVE S A -LINE STA 14+15 TO STA 16+50 SECTION NOTES O1 HMA CL 1/2" PG 54-22. O2 CRUSHED SURFACING BASE COURSE O3 CEMENT CONCRETE CURB & GUTTER PER CFW DWG NO.3-4 D—LINE 4' 7.5'-8.5' I 7,5' �4 PERVIOUS CEMENT CONCRETE SIDEWALK S/W VARIES O5 GRAVEL BACKFILL FOR DRAINS PROFILE I EX. GROUND © CEMENT CONCRETE SIDEWALK GRADE 1 — — � Q CONSTRUCTION GEOTEXTILE FOR UNDERGROUND DRAINAGE REPLACE EX. WALL — t 1 TYPE TBD7 �15 XX 6 XX 1 XX 2 SECTION B D—LINE STA 40+40 TO STA 40+60 DATE: DECEMBER 2013 DESrCNEO: MJR TETRA TECH DRAFT cin oc DRAWN: AA 1nwmrmisch� A Federal Way DHEC EO: SO 400 112THAVE NE, SUrM 400 SUBMITTAL BELLEVUE. WA 98004 RPPROKM SO PHONE: 426-036.1000 FAX:4254336-0150 CALL 2 DAYS BEFORE YOU DIG NOT FOR CONSTRUCTION 1-800-424-5555 S 304TH ST AT 28TH AVE S FILE ECTPROJECT N0: INTERSECTION IMPROVEMENTS T 13-042 ROADWAY SECTIONS DWG NO: C-06 SHEET: $ OF 21 5 4 3 2 This drawing is full size when 22"s 34' or is reduced to half size when 11'%17" A 8 C 0 E ■ C ■ H 5 3 I � I � j w I a I I SEC.4 I N I I I 1 1 1 23+00' 1 T. 21N. R 4E. W.M. I I DATE- DECEMBER 2013 DESIONEO: NW BRAWN: AA CHECKEO: SO APPROVED- SO REV DATE DES OHECK APPROVALS REHDIdN 0EURMPOH I TAX LOT 092I04-9091 20 0 20 40 SCALE IN FEET y waT:R MR VAC � NOTES 1. SEE SITE PREPARATION PLAN AND ROADWAY SECTIONS - FOR SAWCUT LOCATIONS 2. SEE ROADWAY SECTIONS FOR SECTION DEPTHS Y PAVING NOTES _ _ 3-4 CEMENT CONCRETE CURB AND GUTTER CFW DWG NO Q2 PERVIOUS CEMENT CONCRETE SIDEWALK Q3 DRIVEWAY RECONSTRUCTION ® CEMENT CONCRETE SIDEWALK 5Q BLOCK OR ROCKERY WALL — TBD © CONCRETE STAIR CASE If 7Q WALL — TYPE TBD I f T 8E01N 11 TAX LOT 092104-9322 --� J TETRA TECH DRAFT CITY OF w .tatmwch.com SUBMITTAL S Federal Way 4W 11MAVE HE. SUrTE400 BELLEVUE, WA 98004 PHONE 425.915.1 000 ftAlt 426-63&1150 CONSTRUCTION CENTERLINE FULL DEPTH HMA SECTION PERVIOUS CEMENT CONCRETE SIDEWALK CONCRETE DRIVE/WALK CALL 2 DAYS BEFORE YOU DIG 1-800-424-5555 NOT FOR CONSTRUCTION S 304TH ST AT 28TH AVE S FILE PROJECT : N0 INTERSECTION IMPROVEMENTS CT 13-042 PAVING PLAN DWG NO C-07 SHEET: 9 OF 21 5 4 3 2 This drawing is lull size when 22"X 34" or is reduced 10 half size when 11 K1 r 5 4 3 A B C 0 E e S 304TH STREET 10 0 10 20 I `ID _ — B—LINE �5—flG SCALE IN FEET f� e01 W__ JI � _Y• I 9f� of I SIDEWALK AND CURB RAMP DATA STA OFFSET ELEVATION (FINISH GRADE) ELEVATION (TOP OF CURB) IDIN LEGEND ® CROSSWALK I,D, Q RAMP I D. DATE. DECEMBER 2011 DESVIEO: NW EYf2AwN: AA CHECKED' S0 FXV WTE aE5 CHECK APPROVALS KEHSKIN aiSC#�ilOri APPRDVED, SO TETRA TECH DRAFT www,ro[ratacA�an Federal Way 400112rH AVE NE.SUIrO t60 SUBMITTAL SELL ME, WA 08004 PHONE: 425E35-1600 FAX: 47"35.1350 G H CALL 2 DAYS BEFORE YOU DIG NOT FOR CONSTRUCTION 1-800-424-5555 S 304TH ST AT 28TH AVE S FILE N0: INTERSECTION IMPROVEMENTS PROJECT NO: 13-042 PAVING DETAILS DWG NO. C_08 SHEET: 10 OF 21 5 4 3 2 This drawing is lull size when 22x 34- or is reduced 10 hall size when 11 xi r H 4 J A ■ 6 ■ — - L— ! SEC.4 t I I I FOUNDATION LE RAFFOIC SIGNAL PLR SIGNAL AN I I -S1LH; 'EAOCK sM- WATCH' Cd ' u135" I N IE 12" [PEP (SW)=44295' •E 12 CPEP (NE)-41232' li•E 12.CGNC (E)=♦41.92' +II j.(Cj-a+a. 12_CGNC (W)=44I72]-Iw, 1 Ca 11 [ ////// • i NCL1•di II I 1' WOOD PENCE OR Sp-446.11' ! ' CTR STnt I, {' Wr_ICp FENCE IE 12° ceRUCTURE n7 t[3=4k — I \ IE 12' CGNC i5}-faE: ///fff• i4llVB 1/2• REEwt 'A • + � � IE 12" COf{�{II)-lfi W/ uNFE1DA6LE COP � eve 'sa . 4 1 1 —Du — � n 23 � � � LJ1 CIN. r wTP.EEi SON •--r � i�` -� - C 0 E T. 21N. R. 4E W.M. I 1 T 1 1 I 1 1 £VM Tt� e CTR W+�S+ CTR W•+17.TA CTR STRUCTURE 1-2' S `i CTR STR'jj 1' NW CTR FL 12• PVC (W TO S)•441 tt CIR FL SY° Mj (N 10 '.1)-149-26' T ' CTR IA.a IE 12• CONC (r��l -41C IE 12 CONC Irt •1 J; 1 1 too =Eti:- j SIGN.'&r • 1 6" Sr IY (AEIAND) �p .1 rs' V;ocn FEncE 1 vedit 'Bus /f 1 --- `' WATER :4R VAC- -- SD _ �zs+oo Ir —;: 81} SiAEET L 26+00 L d 2 4: -27+0 »ram I GAS%A$¢ \ \ GlL1fa`JC1 i _^�P lu'Kr \ \ \" - , .. ROOF SN%E VAULT r I I nFS1 r, { wW0 FENCE I rm Es7.ux I 1 IE CON' (N)-44: 34' �\iNAfl�`IT-4r1 SOC9 :IPE 1 A�JILT PROPOSED LOCATION OF WATER DF eLOG IE 12- CCNC (s auEr QUALITY TREATMENT FACILITY, TYPE FOUND RE3 a cn E 12 ccnr (N)=,so.7s' I , AND SIZE WILL BE DETERMINED o M Uq.ri1.0 I.� /I{ T: 0 1 3 (1 1 4 CTR STRUCTURE !-2' SE I ii -I- { + CTR FL 12- PVC (N 10 N)=447.20' AI,Y 41 5' 'HOOD FOOL y' r I ll r I a�o 4 ,L1I� + t I T WI Z h I !' a ob �II r n ill 1 `4 3 T \ •I . +\ r 1111 I 44� 3 I JjM ! J - I f '. 21 1" O N[ I 1 ! LV'IK �VcE-j• 1 � I •, 1- DATE: DECEMBER 2013 DESIGNED: KA DRAWN- AA CHECKED: so REEK OATS OE5 cwEcN APPROVALS RENS+aW 0EiXRAlION APPROVED' s0 SI Y� I T�N:w^R.rop [CM[J TAX Liz MID4- ) ['m La -m7l GENERAL LOCATroN a ON SITE IE 12 CGNC (N)=456 GI' SEPTIC SKTEU, P,'10 ROUND .\CCESS LIDS (NOT SUMFD) TAX LDT 092104-9091 1 1 r� WRA ' STW MI ITA% LOT 092104-s322 ABANDON EXISTING CULVERT IN PLACE TETRA TECH WwV 19[f910M.CM1 400 112TH AVE NE, SURE 400 BELLEVUE. WA 98004 DRAFT SUBMITTAL 14 GA CP GAS C>BLE ± r I SEC. 9 OENERPL LOCATION GE ON 517L SEPTIC SYSTEM (NOT SURVEYED) G 20 O 20 40 SCALE IN FEET DRAINAGE GENERAL NOTES 1 SEE PAVING PLANS FOR PERVIOUS CONCRETE SIDEWALK. DRAINAGE CONSTRUCTION NOTES OX STORM DRAINAGE STRUCTURE AND PIPE (DRAINAGE PROFILE PENDING) Qi CATCH BASIN TYPE 1 W/ SOLID RECTANGULAR COVER ❑2 CATCH BASIN TYPE 1 W/ VANED GRATE �3 12"0 RCP STORM SEWER PIPE ® CONNECT EXISTING PIPE TO NEW CATCH BASIN �5 CAP AND PLUG EXISTING PIPE © REMOVE EXISTING CATCH BASIN DRAINAGE LEGEND ■ PROPOSED CATCH BASIN TYPE 1 PER CFW DWG NO 4-1 —SD— PROPOSED STORM SEWER PIPE CALL 2 DAYS BEFORE YOU DIG NOT FOR CONSTRUCTION 1-800-424-5555 S 304TH ST AT 29TH AVE S FILE N0: an of INTERSECTION IMPROVEMENTS �+o+E�T NO; 13-042 _: Federal Way DRAINAGE PLAN OW NOC-09 SHEET: tj OF 21 5 4 3 2 This drawing is full size when 22"1 34" or is reduced to hall size when II"xl P- C E G H 3 I A J ■ r �i 1 �I E SEC.4 r lI II 1 / / I A cu— SD G~ — u--- ��— \ __ [ I23a� � a• sTw 4 flr_. rI �"� SS - -ss 0 T. 21N. R. 4E. W.M. �. CAS i49LS 1� LEGEND EXISTING DESCRIPTION all SIGNAL POLE WITH LED COBRAHEAD LUMINAIRE STREET LIGHT ASSEMBLY L m TYPE 1 JUNCTION BOX EL p TYPE 2 JUNCTION BOX — - - CONDUIT ® LUMINAIRE NUMBER ® CONSTRUCTION NOTE ® WIRE NOTE WIRE SCHEDULE � UNI SIZEOANDITYPE CONDUCTOR COMMENTS 2" SCH 40 PVC 1 20 NOTES ALL PVC CONDUITS CONTAINING CONDUCTORS SHALL CONTAIN GROUND WIRE. GROUND WIRE SIZE SHALL MATCH THE LARGEST CONDUCTOR (MIN #8 AWG OR AS NOTED OTHERWISE IN THE WIRE NOTES). SPARE/EMPTY CONDUIT SHALL CONTAIN DETECTABLE PULL TAPE AND SHALL BE MARKED AS "CITY OF FEDERAL WAY' CONDUIT. ALL CONDUIT SHALL BE SCH 40 PVC, EXCEPT FOR ROAD DRIVEWAY CROSSINGS USE SCH 80 PVC CONDUIT. ALL PSE SERVICE CONDUIT SHALL BE RIGID GALVANIZED STEEL LUMINAIRE SCHEDULE LUMINAIRE CIRCUIT LOCATION TYPE -DISTRIBUTION LUMINAIRE MOUNTING BASE COMMENTS STATION OFFSET NUMBER - WATTAGE ARM HEIGHT TYPE II -MED CUTOFF 35' NEW LUMINAIRE (TO BE MOUNTED 1 1 B-LINE 24+48.7 23.2' LT - 170W LED 8' ON TOP OF SIGNAL POLE) 2 1 B-LINE 25+14.8 34.4' RT II - MED CUTOFF 10' 35' NEW LUMINAIRE (TO BE MOUNTED TOP OF SIGNAL POLE) - 170W LED ON 3 2 A -LINE 15+84.9 39.5' RT II - MED CUTOFF 10' 35' FIXED NEW LUMINAIRE - 170W LED 4 2 A -LINE 14+90.4 38.9' RT II - MED CUTOFF 10' 35' FIXED NEW LUMINAIRE - 170W LED DATE: DECEMBER 2013 DESIGNED: JL DRAWN: AA CHECKED: 50 APPROVED: 50 REV cAi Of5 GEC# APPROVALS RL1 I. DESCRIPTION t SEE SIGNAL PLAN C-14 FOR CONDUIT/WIRING t IN THIS AREA t t f ti� � f 1 sNsr NA (ALAND) I 1 3 f i &'rAIVA/T It j I 1 _ te PF"E it ;t'1 TETRA TECH DRAFT WN'NISSUITi400 aAM112TH AVE FIE, SOITEAgO SUBMITTAL RELLEVOC. WA 90004 W B-LINE 26+00 '- S 304TH MEET i IS L�ILE SEE :C-4 20 0 20 40 SCALE IN FEET SEC. 9 GENERAL NOTES 1. ALL WORK SHOULD BE IN ACCORDANCE WITH CITY OF FEDERAL WAY STANDARDS AND SPECIFICATIONS CONTACT THE ENGINEER 5 WORKING DAYS PRIOR TO COMMENCING WORK. 2. THE LOCATIONS OF FEATURES SHOWN ARE APPROXIMATE AND SHALL BE VERIFIED IN THE FIELD BY THE CONTRACTOR AS NECESSARY. 3. LIGHT STANDARD FOUNDATIONS SHALL NOT BE EXCAVATED AND POURED BEFORE POLE LOCATIONS ARE APPROVED BY THE ENGINEER. 4. THE CONTRACTOR SHALL SUBMIT A REQUEST TO THE CITY OF FEDERAL WAY FOR MATERIALS APPROVAL AT THE EARLIEST POSSIBLE DATE. 5. ALL WORK SHALL BE CONSISTENT WITH UTILITY AGENCY REQUIREMENTS. THE CONTRACTOR SHALL CONTACT ALL PERTINENT UTILITY AGENCIES 48 HOURS BEFORE COMMENCING WORK AND SHALL COORDINATE WITH AFFECTED UTILITY AGENCIES THROUGHOUT THE PROJECT. 6. THE CONTRACTOR SHALL BE RESPONSIBLE FOR ANY DAMAGE TO EXISTING UTILITIES THE CONTRACTOR SHALL NOTIFY THE AFFECTED UTILITY COMPANY AND THE CITY IMMEDIATELY UPON DAMAGE. 7. ALL CONDUIT COVER SHALL BE 24 INCHES MINIMUM. B. LUMINAIRE WIRING AND JUNCTION BOX PLACEMENT SHALL CONFORM TO THE CITY OF FEDERAL WAY STANDARD DRAWING NO. 3-40. LUMINAIRE POLE DESIGN SHALL CONFORM TO THE CITY OF FEDERAL WAY STANDARD DRAWING NO. 3-39. ELECTRICAL SERVICE PLACEMENT AND WIRING SHALL CONFORM TO THE CITY OF FEDERAL WAY STANDARD DRAWING NO. 3-41. 9. JUNCTION BOX SHALL CONFORM TO WSDOT STANDARD PLAN J-40.10-02 (TYPE 1 OR 2) WITH GALVANIZED LID. LID TO BE WELDED SHUT AFTER FINAL INSPECTION W/2 1" LONG WELDS AT OPPOSITE CORNERS. 1C. ALL NEW JUNCTION BOXES INSTALLED IN SIDEWALKS SHALL HAVE SKID RESISTANT LIDS. EXISTING JB WITHIN SIDEWALK SHALL BE UPGRADED TO SKID RESISTANT LIDS. 11, NUMBER OF CONDUIT BENDS BETWEEN PULL POINTS SHALL NOT BE MORE THAN THE EQUIVALENT OF FOUR QUARTER BENDS (360 DEGREES TOTAL). IF NUMBER OF BENDS EXCEEDS 360 DEGREES. THE CONTRACTOR SHALL INSTALL ADDITIONAL JUNCTION BOXES, AS REQUIRED. CONSTRUCTION NOTES O1 CONSTRUCT FOUNDATION, FURNISH AND INSTAL!. ROADWAY LUMINAIRE POLE (HANDHOLE SHALL BE ORIENTED AT THE SAME ORIENTATION AS THE LUMINAIRE ARM), LUMINAIRE ARM, LED COBRAHEAD LUMINAIRE ASSOCIATED EQUIPMENT PER CITY STD DWG 3-39 UNLESS OTHERWISE NOTED. WIRING AND CONDUTT BETWEEN JUNCTION BOX AND LUMINAIRE SHALL BE PER CITY STD DWG 3-40 (WIRE SIZE BETWEEN JUNCTION BOX SPLICE AND POLE FUSE DISCONNECT SHALL MATCH THE ASSOCIATED CIRCUIT SIZE). LUMINAIRE POLE NUMBERING SHALL BE PER CITY STD DWG 3-39B. SEE DWG NO. C-XX FOR LUMINAIRE POLE DETAIL AND ADDITIONAL INFORMATION. SEE SPECIAL PROVISION. 20 SEE SHEET C-14 FOR MORE CONDUITS CONNECTING TO THE JUNCTION BOX. 03 LUMINAIRE MOUNTED ON TOP OF SIGNAL POLE. CALL 2 DAYS BEFORE YOU DIG 1-800-424-5555 NOT FOR CONSTRUCTION S 304TH ST AT 28TH AVE S FILE PROJECT CITY OF INTERSECTION IMPROVEMENTS PROJECT N0: 13-042 { Federal Way ILLUMINATION PLAN AND DETAILS DWG N0 C-12 SHEET: 14 OF 21 4 3 2 This drawing is full site when 22"z 34- or is reduced to halt size when 11 m 4 3 A - 22+00 R-5 B C D ■ T. 21N. R. 4E. W.M. I j I I SEC.4 W r BEGIN 7 ' B STA 24+00 rr C4 I i (4.4' LT) �\ MATCH EXISTING `----� ------�1-- SY" S 304TH STREET 23+00 1 M- R-2 SIGNING LEGEND S� SIGN NO. R-X SIGN REMOVAL NOTE T NEW SIGN AND POST OR RELOCATE SIGN AND/OR POST I BEGIN B STA 24+00 (15.2' LT) MATCH EXISTING R-1 7 8 STA 24+18 R-2 (kO LT) 7 B STA 24+20 ... (4.3_ LT) B-LINE =+O °T 4 - �� 4 I 1 = BEGIN 7 R-4 B STA 24+00 END 3 1,4.1RT) B STA 24+DD MATCH EXISTING (14.8' RT) I MATCH EXISTING I NO 7 END 2 EA STA 16+22 B STA 24+29 (5.4' RT) (14.8' RT) I END 77 -'� A STA 16+08 f (3.6' RT) f I GENERAL NOTES 1. ALL PAVEMENT MARKINGS SHALL BE IN ACCORDANCE WITH CFW STANDARD DETAILS 3-17 THRU 3-21 UNLESS OTHERWISE NOTED. 2. ALL LONG LINE PAVEMENT MARKINGS SHALL BE TYPE D METHYLMETHACRYLATE (MMA), ALL OTHER PAVEMENT MARKINGS (CROSSWALKS, BIKE SYMBOLS, TRAFFIC ARROWS) SHALL BE TYPE A (THERMOPLASTIC). 3. CONTRACTOR TO REMOVE ANY EXISTING PAVEMENT MARKINGS IN CONFLICT WITH PROPOSED PAVEMENT MARKINGS. 4. OFFSET SIGN 2' FROM FACE OF CURB PER CFW STANDARD DETAIL 3-52 & 3-53, UNLESS OTHERWISE NOTED. A STA 15+83 5 I' (10.1' RT) I - I I A STA 15+28r1 r (10.1' RT)-' I I I I I f I f 1 40 0 0 0 1 E A,F O H BEGIN 8 STA 25+05 (6.0' LT) ENO 3 7 $EGiN B STA 26+25 B STA 25+08 (17 0' LT) (6.7' RT) MATCH EXISTING 5 B STA 25+411 ENO 2 (1O. 1 0' RT) B STA 26+10 (6.0' LT) R-6 MATCH EXISTING 20 0 20 40 777 SCALE IN FEET tF 2'_ 26+00 - - - ----.='�- - .__. -- ----�---- 3 BEGIN I �-4- 8 STA 25+1; R-3 (17.0' RT) 1 7 END B STA 26+02 5 B STA 26+25 Q R3-17/R3-17BP (0.0' RT) (6.1- RT) MATCH EXISTING TAX LOT 092104-9236 3 END ' ]END B STA 26+25 A STA 16+22 (17.0' RT) I (25.7' RT) F MATCH EXISTING -EJA STA 14+89 (27.4' RT) SEC.9 A STA 15+83 (1&8' RT) CHANNELIZATION LEGEND ElPLASTIC CROSSWALK LINE PER CFW STD DETAIL 3-20 (TYPE A) A STA 15+28 (18.5' RT) 2❑ 8" WHITE PROFILED PLASTIC WIDE LANE LINE PER CFW STD DETAIL 3-18 (TYPE D). �3 4" WHITE EDGE FLAT PLASTIC LINE PER CFW STD DETAIL 3-17 (TYPE D). TAX LOT 092104-9091 ® PLASTIC 18" STOP LINE PER CFW STD DETAIL 3-20 (TYPE A). �5 PLASTIC TRAFFIC ARROW TYPE 2S PER CFW STD DETAIL 3-21 (TYPE A). a © PLASTIC BIKE LANE SYMBOL PER CFW STD DETAIL 3-20 (TYPE A) x�0 7❑ DOUBLE YELLOW CENTER PROFILED PLASTIC LINE PER CFW STD DETAIL 3-17 (TYPE D). A STA 14+89 (26.8' RT) 32" R3-8 MOD MOUNT ON LUMINAIRE POLE BEGIN 2 I - ` A STA 14+72 (13.8' RT) I I 1 BEGIN 7 A STA 14+13 { Ifl I I (2.2' RT) I MATCH EXISTING I 3 BEGIN I I iAX l07 092104-9322 BEGIN 3 A STA 14 32 A STA 14+13 I + (13.6' RT)1 (8.4' LT) I I l I f t TE. DECEMBER 2013 DESIGNEO. JL DRAWN: AA CHECKED: SO RCV OATS Txs CHECK APPROVALS I RLN15*N DESCRIPTION ADPROY{O' SO a TETRA TECH DRAFT °"�t"" Federal Way SUBMITTAL 400 112TH AVE NE. NE, SURE 400 BELLEVUE, WA 98004 PHONE: 42"35-1000 FAX:425-635-1150 t::�a Ir 30" OL NLY ONLY R3-8 MOD CALL 2 DAYS BEFORE YOU DIG NOT FOR CONSTRUCTION 1-800-424-5555 S 304TH ST AT 28TH AVE S PROJECT ECLE T P INTERSECTION IMPROVEMENTS PRONO: 13-042 Drib NO: 0-13 PAVEMENT MARKING AND SIGNING PLAN SHEET: 15 of 21 5 4 3 2 This drawing is full size when 22"X 34- or is reduced to hair size when 1 1 XI z A 9 C D E )F C. H 5 1 3 B / W/ UNREADABLE CAP SEC. 4 SIGN: "30 MPH" ' N 6' WOOD FENCE r I SD— _--- T. 21N. R. 4E W.M. I 11 SIGN: "ST( P" ; x I : 1 w 1 . * TER ""`-'-- '----- �til3 EVPA 21 — w �S304Ti fii Rmr W �14 S1_,-I~� TW G (DEALT) 1 1 EVPC 24+00 J� ro r---- --j `—_ f mac' 1 W W y ----W' W— W- I � — I �Da �1 1 31 �— r— iT I 42, 3 I � - BP --�P BP &_ aP� 58 5 I -- I G — s1�I -SIGN: "STOP_7 � T L --,. ' r EL ECTRICAL 6 VAULT �3z I °°'49 7 5 I 48 'OOD FENCE 1 I � I ; ELECTRICnI V I I I ] VAULT I I I n o 1 r--�3 I I II I I 1 I ' I I I DRI EWAYI I co 6' WOOD FENCE r m I .n r PHASE SEQUENCE DIAGRAM w , .1 .A PRE-EMPTION SCHEDULE FUTURE I .7-1 (— FYA FUTURE FUTURE FYA sn so Qr mm 4� PROTECTED VEHICLE MOVEMENT " 4 PERMISSIVE VEHICLE MOVEMENT PEDESTRIAN MOVEMENT F�V WTE I DES I CHECK I APPROVALS I NSH9ON DESCRIPTION This drawing is full size when 22"x 34' or is reduced to half size when 11"x17" EVP r PHASES A 02 B 04 C 03 + 08 DATE: DECEMBER DESIGNED: JL DRAWN: AA CHECKED: SO APPROVED: SO ------------ ------- �� _ 47 - - _ --� - J �— a SIGNAL HEAD ASSIGNMENTS 12" R 17.2" 12.1 12" R 12" Y FLASHING YELLOW 12" YNN ARROW INDICATES HORIZONTALJ LOCATION - TYPE "N" G 12" 12" G HEAD N 25, 29. 48, 49. MOUNTING TYP 58, 59 HEAD N0. HEAD N0. 23, 31. 32 21, 22, 41, 42, 81, 82 TO TRAFFIC CONTROLLER - - -- — — - - _ _ AT NE CORNER OF MILITARY RD S S 304TH STREET INTERSECRTION NOTES: 1_ ALL VEHICLE SIGNAL HEADS SHALL BE LED TYPE AND SHALL USE TUNNEL VISORS, SQUARE DOORS AND 5" BACKPLATES- ALL SIGNAL HEAD BLACKPLATES SHALL HAVE 2" YELLOW REFLECTORIZED TAPE INSTALLED. MAST ARM MOUNTED VEHICLE SIGNAL HEADS SHALL USE MOUNTING TYPE "N". POLE MOUNTED VEHICLE SIGNAL HEADS SHALL USE MOUNTING TYPE "K" OR TYPE "D". 2. ALL PEDESTRIAN SIGNAL HEADS SHALL BE LED TYPE WITH SOLID SYMBOLS AND SHALL BE EQUIPPED WITH "Z" CRATE VISORS ALL PEDESTRIAN SIGNAL HEADS SHALL USE MOUNTING TYPE "E". ALL PEDESTRIAN SIGNAL HEADS SHALL BE COUNTDOWN TYPE AND SHALL CONFORM TO THE LATEST MUTCD REQUIREMENTS - A i . —. —x� LEGEND *' EXISTING PROPOSED ® 0D] m00 3 3 f --Dl —10 t SEC. 9 — — b• i N ® m /f Ell 10 0 10 20 0 SCALE IN FEET O Q TYPICAL VIDEO DETECTION ZONE AND LOOP LOCATIONS I FVXX2� -- --� L_—J v1iX1 STOP BAR * FINAL VIDEO DETECTION ZONE AREAS AND LOCATIONS SHALL BE DETERMINED IN FIELD BY CITY TRAFFIC MAINTENANCE REPRESENTATIVE TETRA TECH DRAFT Federal Way """,SUM 400 SUBMITTAL 400 112THAVE NE, SURE 400 BELLEVUE. WA 98004 PHONE: 425-635-1000 FAX: 425-635-1150 TYPE 1, 2, 8 JUNCTION BOX VEHICLE SIGNAL HEAD (THROUGH) VEHICLE SIGNAL HEAD (TURN) PEDESTRIAN SIGNAL HEAD EMERGENCY VEHICLE PRE-EMPTION SIGNAL POLE SIGNAL POLE WITH LED COBRAHEAD LUMINAIRE TYPE PS POLE W/PPB TYPE I SIGNAL POLE W/PPB SIGNAL CONTROLLER CABINET ELECTRICAL SERVICE CABINET SIGN ON MAST ARM VIDEO DETECTION CAMERA PVC CONDUIT UNINTERRUPTABLE POWER SUPPLY (UPS) SIGNAL POLE NUMBER CONSTRUCTION NOTE WIRE NOTE SIGN NOTE NOTES: 1. FOR CONSTRUCTION, WIRE AND GENERAL NOTES AND SIGN SCHEDULE, SEE DWG NO. C-15. 2. FOR WIRE DIAGRAM SEE DWG NO. C-16. 3. FOR SIGNAL DETAILS AND SIGNAL POLE SCHEDULE SEE DWG NO, C-17. CALL 2 DAYS BEFORE YOU DIG NOT FOR CONSTRUCTION 1-800-424-5555 S 304TH ST AT 28TH AVE S RLE NO: INTERSECTION IMPROVEMENTS PROJECT NOF 13-042 TRAFFIC SIGNAL PLAN DK NO: C-14 SHEET: 16 OF 21 5 4 3 2 A } B 6 D E 1F G H a 4 3 a CONSTRUCTION NOTES O1 CONSTRUCT FOUNDATION AND INSTALL TYPE III SIGNAL POLE PER SIGNAL POLE SCHEDULE, DWG NO. C-17. INSTALL THREE VEHICLE SIGNAL HEADS, ONE TYPE 711 EMERGENCY PRE-EMPTION DETECTOR AND INDICATOR, ONE REGULATORY SIGN AND ONE STREET NAME SIGN ON THE FIRST MAST ARM. INSTALL THREE SIGNAL HEADS, ONE TYPE 711 EMERGENCY PRE-EMPTION DETECTOR AND INDICATOR, AND ONE STREET NAME SIGN ON SECOND MAST ARM. INSTALL ONE 240V M-C-II 240W LED LUMINAIRE AND ONE VIDEO DETECTION CAMERA ON THE LUMINAIRE ARM. INSTALL ONE COUNTDOWN TYPE PEDESTRIAN SIGNAL HEAD, ONE PUSH BUTTON ASSEMBLY (SEE SPECIAL PROVISIONS SECTION 9-29.19) AND ONE TERMINAL CABINET ON THE POLE. FOR POLE LOCATION AND DETAILS SEE SIGNAL POLE SCHEDULE DWG NO. C-17, O2 CONSTRUCT FOUNDATION AND INSTALL TYPE PS SIGNAL POLE PER WSDOT STD PLAN J-21,10-02. INSTALL ONE COUNTDOWN TYPE PEDESTRIAN SIGNAL HEAD AND ONE PUSH BUTTON ASSEMBLY (SEE SPECIAL PROVISIONS 9-29.19) ON THE POLE. FOR POLE LOCATION AND DETAILS SEE SIGNAL POLE SCHEDULE DWG N0. C-17. 03 CONSTRUCT FOUNDATION AND INSTALL TYPE III SIGNAL POLE PER SIGNAL POLE SCHEDULE, DWG NO. C-17, INSTALL TWO VEHICLE SIGNAL HEAD, ONE TYPE 711 EMERGENCY PRE—EMPTION DETECTOR AND INDICATOR, ONE REGULATORY SIGN, AND ONE STREET NAME SIGN ON THE MAST ARM. INSTALL ONE 240V M—C—II 170W LED LUMINAIRE AND ONE VIDEO DETECTION CAMERA ON THE LUMINAIRE POLE. INSTALL TWO COUNTDOWN TYPE PEDESTRIAN SIGNAL HEADS, TWO PUSH BUTTON ASSEMBLY (SEE SPECIAL PROVISIONS SECTON 9-29.19) AND ONE TERMINAL CABINET ON THE POLE. FOR POLE LOCATION AND DETAILS SEE SIGNAL POLE SCHEDULE DWG NO. C-17. ® INTERCEPT TWO EXISTING 3 INCH PVC CONDUITS AND ONE EXISTING 2 INCH PVC CONDUIT. Q5 CONSTRUCT FOUNDATION PER CITY OF FEDERAL WAY STD DETAIL DWG NO. 3-45C (SEE C—XX FOR GRADING). FURNISH AND INSTALL TS2 TYPE 1 TRAFFIC CONTROLLER AND CONNECT ALL FIELD WIRING PER CITY OF FEDERAL WAY STD DRAWING 3-45B, VERIFY FINAL LOCATION WITH THE ENGINEER IN THE FIELD. SEE SPECIAL PROVISIONS SECTION 8-20.3(4). © INSTALL PEDESTRIAN PUSH BUTTON (PPB) POLE AND FOUNDATION PER WSDOT STD PLAN J-20.10-01 AND J-20.11-00. INSTALL ONE PUSH BUTTON ASSEMBLY ON PPB (SEE WSDOT STD PLAN J-20.26-01). O7 CONSTRUCT FOUNDATION AND INSTALL TYPE I SIGNAL POLE PER WSDOT STD PLAN J-21.10-02. INSTALL ONE VEHICLE SIGNAL HEAD (SEE WSDOT STD PLAN J-75.10-01), ONE COUNTDOWN TYPE PEDESTRIAN SIGNAL HEAD AND ONE PUSH BUTTON ASSEMBLY (SEE SPECIAL PROVISIONS SECTION 9-29.19) ON THE POLE. FOR POLE LOCATION AND DETAILS SEE SIGNAL POLE SCHEDULE DWG NO. C-17. ® VIRTUAL LOOP DETECTION ZONE. EXACT LOCATION TO BE DETERMINED BY CITY ENGINEER IN THE FIELD. O9 REMOVE EXISTING JUNCTION BOX. GENERAL NOTES 1. ALL WORK SHALL BE DONE IN ACCORDANCE WITH THE CITY STANDARDS, KING COUNTY TRAFFIC REQUIREMENTS, WSDOT / APWA STANDARD PLANS, STANDARD SPECIFICATIONS, LATEST AMENDMENTS TO SPECIAL PROVISIONS AND THESE PLANS. 2. CONTRACTOR SHALL COORDINATE WITH PUGET SOUND ENERGY REGARDING THE SERVICE CONNECTION. CONTRACTOR SHALL CONTACT PSE REPRESENTATIVE PRIOR TO INSTALLATION OF METER BASE. 3. FOR COORDINATION OF SIGNAL WORK AND TURN ON WITH KING COUNTY, CONTRACTOR SHALL CONTACT KING COUNTY TRAFFIC MAINTENANCE UNIT. 4. THE LOCATION OF ALL FEATURES TO BE INSTALLED BY THE CONTRACTOR SHALL BE VERIFIED IN FIELD BY THE ENGINEER PRIOR TO INSTALLATION. 5, CONDUIT LOCATIONS ARE SHOWN FOR REFERENCE ONLY. FINAL LOCATIONS SHALL BE DETERMINED BY THE CONTRACTOR AND APPROVED BY THE ENGINEER IN THE FIELD. 6. ALL NEW FOUNDATION LOCATIONS SHALL BE APPROVED BY THE ENGINEER PRIOR TO EXCAVATION. CONTRACTOR SHALL CHECK FOR MINIMUM OVERHEAD CLEARANCE OF 16'-6" FOR ALL SIGNAL HEADS ABOVE THE STREET PRIOR TO POURING OF THE MAST ARM POLE FOUNDATIONS. 7. ALL NEW JUNCTION BOXES PLACED IN THE SIDEWALKS SHALL HAVE SKID RESISTANT, LOCKING LIDS. 8, ALL TRAFFIC SIGNAL, PEDESTRIAN HEADS AND PUSH BUTTONS SHALL BE SECURELY AND COMPLETELY COVERED WHILE SIGNAL IS NOT IN OPERATION. 9. FOR LEGEND, PHASE SEQUENCE DIAGRAM, SIGNAL HEAD ASSIGNMENTS, EVPE SCHEDULE, SEE DWG NO, C-14. 10. FOR WIRE DIAGRAM SEE DWG NO. C-16. 11. FOR SIGNAL POLE SCHEDULE SEE DWG NO. C-17. WIRE NOTES DIAMETER, (INCHES) SERVICE (2/0) POWER (#6) INTERCONN. 6PR ILLUM. (#8) PED PUSH BUTTON (2CS—#14) EVPE DETECT (3CS—#20) EVPE IND. (2CS—#14) VEHICLE HEAD (5C) PEDESTRIAN HEAD (5C) VEHICLE HEAD (7C) VIDEO (14�) SM T SMFO REMARKS 2 1 2 2 2 2 2 3 2 2 4 2 2 2 5 2 2 2 6 2 2 7 3 I 2 2 8 2 2 9 2 3 10 4 2 2 11 2 2 2 12 2 2 13 3 2 2 14 4 3 NOTES 1. ALL PVC CONDUIT CONTAINING CONDUCTORS SHALL CONTAIN GROUND WIRE. GROUND WIRE SIZE SHALL MATCH THE LARGEST CONDUCTOR (MIN #8 AWG OR AS NOTED OTHERWISE IN THE WIRE NOTES). SPARE / EMPTY CONDUIT SHALL CONTAIN DETECTABLE PULL TAPE AND SHALL BE MARKED AS "CITY OF FEDERAL WAY" CONDUIT. 2. ALL CONDUIT SHALL BE RIGID PVC SCH 40, EXCEPT UNDER ROADWAY USE RIGID PVC 80. ALL PSE SERVICE CONDUIT BENDS SHALL BE RIGID STEEL DATE: DECEMBER 201 DESIGNED: JL DRAWN' AA CHECICEO: SO REV REMSION DESCRIPTION APPROVED- SO D TETRA TECH www.Iuvomcn rod, 400 112TH AVE NE, SUITE 400 BELLEVUE, WA 98004 PHONE: 425-635-1000 FAX:4256351150 SIGN SCHEDULE S-1 28th Ave S 12D S-2 D3-301MOD (16"02") S-3 s-s YELLOW ARRC DRAFTCITYOF SUBMITTAL =- Federal Way S-4 S 304th St. 12D D3-301MOD (16"x72") YIELD TO PEDESTRIANS ON FLASHING YELLOW SPECIAL k4L x4a J 3C 4D 4C 3C 3C BLACK ON WHITE CALL 2 DAYS BEFORE YOU DIG FNOT FOR CONSTRUCTION 1-800-424-5555 S 304TH ST AT 28TH AVE S FILE NO: INTERSECTION IMPROVEMENTS PROJECT NO: 13-042 SIGNAL NOTES AND WIRE SCHEDULE DWC K: C-15 SHEET: TJ OF 21 5 3 2 This drawing is lull size when 22"x 34 or is reduced to naK sae wnen II xIr �-�A B C D E F G H 5 3 MEASURE ATTACHMENT POINT ANGLES CLOCKWISE FROM POLE ORIENTATION LINE (El ATTACHMENT POINT) TO THE ATTACHMENT POINT LOCATION w POLE ORIENTATION LINE (El ATTACHMENT POINT POLE ORIENTATION ANGLE (P.O.A.) DEGREES CLOCKWISE FROM OFFSET LINE TO POLE ORIENTATION LINE — (Ell ATTACHMENT POINT) SIGNAL STANDARD IDENTIFICATION TAG DETAIL EXAMPLE STD. NO XX SIGNAL STANDARD NO NO. 02 SRXXX, MP XXX XX STATE ROUTE AND STD. MILE POST NO- 069. MANUFACTURER RCTURER 09 MANUFACTURER MANR APPROVED DWG. XXXXXX APPROVED DRAWING N0. APPROVED DWC. A812345 FAB_ 6/14/2002 FAB- X/XX/XXXX FABRICATION DATE NOTE: CORROSION RESISTANT METAL TAG SECURED WITH (2) 0.125" RIVETS AS FOLLOWS: POLE SHAFT — LOCATED WITHIN 6" ABOVE HAND HOLE (TYPE II & III). SIGNAL AND LUMINAIRE MAST ARM (TYPE II & III) — LOCATED WITHIN 6" OF THE LUMINAIRE ARM AND THE POLE SHAFT CONNECTION POINT (TYPE III). TEXT SHALL BE A MINIMUM OF 3/16" HIGH, STAMPED OR EMBOSSED. - ATTACHMENT POINT ALL HANDHOLES AT 180" FROM E1 ANCHOR BOLT PLATE LOCATION STATION �O p Y� POLE ORIENTATION AND ATTACHMENT POINT DETAIL NOTES OMOUNTING COUPLING INSTALLED AT OFFSET DISTANCE INDICATED IN CHART. O FIELD INSTALLED. SIGN B — 7.5 SO. FT, SIGN AREA (MAX.) AND SIGN HEIGHT 3 FT. (MAX.) SIGN C — 36 SO, FT. SIGN AREA (MAX.) INSTALLED 1'-0" MIN, AND 2'-6" MAX TO SIGN EDGE FROM CENTERLINE OF THE POST AND SIGN HEIGHT 3 FT. (MAX.) SIGN E — 15 SO. FT. SIGN AREA (MAX.) AND SIGN WIDTH 3 FT. (MAX.) B1 f '2' 62 B3 85 B4 d b b a ------------ d ------------------- ALTERNATE NOTE 1 FOR TYPE N MOUNT ONLY. C1 DRILL I" DIAM. HOLE IN MAST ARM AND INSTALL PLASTIC SPLIT BUSHING FOR CABLE ENTRANCE. 66 ti� h B7 B9 Cb 810 B11 b b c a ----------------------- a E 1 NOTE: i SIG NAL DISPLAY VERTICAL CLEARANCE TO ROADWAY TYPE E MOUNTS SHALL BE USED FOR PEDESTRIAN DISPLAYS ON TYPE II OR III SIGNAL STANDARDS, WITH THE FOLLOWING EXCEPTIONS: PEDESTRIAN DISPLAYS MOUNTED ON OCTAGONAL (8 SIDED) g g g g ; SIGNAL STANDARDS AT AN ANGLE OTHER THAN A 45'INCREMENT SHALL USE A TYPE A MOUNT FOR JJ TWO PEDESTRIAN DISPLAYS, OR A TYPE B MOUNT FOR SINGLE PEDESTRIAN DISPLAY. LEGEND a. VEHICLE DISPLAY b. MAST ARM MOUNTED SIGN c. STREET NAME SIGN d. PRE—EMPT DETECTOR e. POST MOUNTED SIGN f. LUMINAIRE g. PEDESTRIAN DISPLAY h. TERMINAL CABINET I. PPB—M j. HANDHOLE *ELEVATION IS TO TOP OF FOUNDATION. FIELD VERIFY ELEVATION PRIOR TO ORDERING SIGNAL STANDARDS. o i 1 0 0 HEIGHT OF PEDESTRIAN I i f i i p O PUSH BUTTON: [a I 1 a1 I I i 42" IS RECOMMENDED HORIZONTAL DISTANCE FROM STOP LINE aD' 43 50 53' — 180' MIN. MAX. MIN. MAX. MIN_ MAX MIN. MAX. '3 SECT10N 12" 5 SECTION DOGHOUSE 12- 16.5' 17.5' 16, 5' 19.2' 16.5' 20.9' 16.5 22.0' 4 SECTION 12" 16.5' 17.0' 16, 5' 18 0' 16.5' 19.7' 16.5' 20.8' 5 SECTION 12" 16.5' 17.0' 16,5' 17-5' 16.5 18.5' 16.5' 19.6' MEASURED FROM BOTTOM OF SIGNAL HEAD HOUSING TO ROADWAY (TYPICAL) 32" MINIMUM o _ 48" MAXIMUM TYPE PPB TYPE PS TYPE I PPB POST PED. HEAD VEHICLE HEAD STANDARD STANDARD OPLACEMENT SHALL BE 2' — 0" MIN. FROM FACE OF CURB OR EDGE OF SHOULDER; 3' — 0" MIN. FROM FACE OF GUARDRAIL; 4' — 0" MIN. FROM CONIC BARRIER TYPE 2 (MEASURED FROM A POINT WHERE THE 1 BARRIER BASE MEETS THE SHOULDER SURFACE (TOE). MEASUREMENT TAKEN FROM TRAFFIC SIDE OF BARRIER; TO FACE OF POLE O FOR POST OUNTED SIGNS THERE SHALL BE 2' — 0" MIN, FROM THE FACE OF THE CURB OR THE EDGE OF THE ODMS OR VMS IS NOT ALLOWED ON THIS POLE. SHOULDER TO THE EDGE OF THE SIGN SIGNAL STANDARD DETAIL CHART �0��0m�000�0� DECEMBER 201 IED: JL AA Co., so 4ER SO a TETRA TECH wwAelNWcm. 400 112TH AVE NE, SURE 400 BELLEVUE. WA 98004 PHONE: 425E3-11000 FAX: 425-635-1150 5 4 _-----; A2 I F F OR 2 i H e I 1 h E , Al G G 9 9 ELEVATION IS TO TOP OF FOUNDATION CURB OR EDGE OF SHOULDER Mull ROADWAY SEE WSDOT STANDARD PLAN TS OF VERTICAL CLEARANCE J-2610-02 FOR FOUNDATION INFORMATION. TYPE II, Iq + SD SIGNAL STANDARD APPLY GROUT EVEN WITH THE BOTTOM OF THE ANCHOR PLATE AFTER PLUMBING THE STANDARD, PROVIDE 3/8" DIAMETER DRAIN TUBE IN THE GROUT PAD CALL 2 DAYS BEFORE YOU DIG [NOT1-800-424-5555 FOR CONSTRUCTION S 304TH ST AT 28TH AVE S FILE PROJECT DRAFT �1T.oF INTERSECTION IMPROVEMENTS PROJECT NO: C13-042 SUBMITTAL Federal Way SIGNAL POLE DETAILS °WG N0 SHEET: 19 OF 21 2 This drawing is full size when 22'z 34' or is reduced to hall size when 11"z17