23-103436-UP-Technical Information Report-07-25-2023
TECHNICAL INFORMATION
REPORT
FOR
ASSA 2
RETAIL BUILDING
FEDERAL WAY, WASHINGTON
JUNE 2023
Prepared For:
Daniel Yu (Assa 2, Inc.)
1420 348th St.
Federal Way, 98003
Prepared By:
Jamey Barr, Design Engineer
Approved By:
Brett Allen, P.E., Project Engineer
PO Box 949
Gig Harbor, WA 98335
(253) 857-5454
Project # 23-015
I hereby state that this Technical Information Report for ASSA 2 Retail Building has been prepared by me or under my supervision
and meets the standard of care and expertise that is usual and customary in this community of professional engineers. I
understand that King County does not and will not assume liability for the sufficiency, suitability or performance of drainage facilities
prepared by Contour Engineering LLC. This analysis is based on data and records either supplied to, or obtained by, Contour
Engineering, LLC. These documents are referenced within the text of the analysis. The analysis has been prepared utilizing
procedures and practices within the standard accepted practices of the industry.
1
TABLE OF CONTENTS
PAGE
1.0 PROJECT OVERVIEW .................................................................................................................................. 2
1.1 PURPOSE AND SCOPE ...................................................................................................................................... 2
1.2 PRE-DEVELOPED CONDITIONS........................................................................................................................ 2
1.3 DEVELOPED CONDITIONS ............................................................................................................................... 3
2.0 CONDITIONS AND REQUIREMENTS SUMMARY ............................................................................... 5
3.0 OFFSITE ANALYSIS (LEVEL 1 DOWNSTREAM) ................................................................................. 7
3.1 DEFINE AND MAP STUDY AREA ..................................................................................................................... 7
3.2 REVIEW ALL AVAILABLE INFORMATION OF THE STUDY AREA ...................................................................... 7
3.3 FIELD INSPECT THE STUDY AREA ................................................................................................................... 7
3.4 EXISTING AND PREDICTED DRAINAGE AND WATER QUALITY ISSUES ............................................................ 7
4.0 FLOW CONTROL, LOW IMPACT DEVELOPMENT (LID) AND WATER QUALITY FACILITY
ANALYSIS AND DESIGN ........................................................................................................................................ 8
4.1 EXISTING SITE HYDROLOGY ........................................................................................................................... 8
4.2 DEVELOPED SITE HYDROLOGY ...................................................................................................................... 8
4.3 ON-SITE STORMWATER CALCULATIONS ........................................................................................................ 8
4.4 FLOW CONTROL BMPS .................................................................................................................................. 8
5.0 CONVEYANCE SYSTEM ANALYSIS AND DESIGN .............................................................................. 8
6.0 SPECIAL REPORTS AND STUDIES ......................................................................................................... 9
7.0 OTHER PERMITS .......................................................................................................................................... 9
8.0 CSWPP PLAN ANALYSIS AND DESIGN ................................................................................................ 9
8.1 ESC PLAN ANALYSIS AND DESIGN................................................................................................................. 9
8.2 SWPPP PLAN DESIGN .................................................................................................................................... 9
9.0 BOND QUANTITIES, FACILITY SUMMARIES & DECLARATION OF COVENANT ..................... 9
10.0 OPERATIONS AND MAINTENANCE MANUAL ................................................................................. 9
Appendix A General Exhibits and TIR Worksheet
Appendix B Plan Exhibits
2
1.0 PROJECT OVERVIEW
1.1 Purpose and Scope
This Technical Information Report accompanies the ASSA 2 Retail Building submittal
application. The site is located within a portion of the Northeast quarter of the Southeast
quarter of Section 20, Township 21 North, Range 4 East, W.M. The proposed project
includes the construction of a new commercial building on a site with access from 348th
South St. The site was previously prepared for the new building with the adjacent
building, including parking and utility connections.
The 2021 King County, Washington Surface Water Design Manual (KCSWDM),
Washington Surface Water Design Manual, the King County Stormwater Pollution
Prevention Manual, and the latest edition of the LID Technical Guidance Manual for
Puget Sound establish the design methodology and design criteria used for this project.
The following is a description of pertinent site information associated with the proposed
project:
Site Address – 1416 S. 348th St., Federal Way, WA. 98003
Tax Parcel Number – 2021049088
Parcel Area – 18,911 sq. ft. (0.43 acres)
Per Figure 1.1.2.A of the 2021 KCSWDM, this project meets the criteria for Full Drainage
Review. Therefore, all nine of the core requirements and all five of the special
requirements will be addressed as part of this project. See Appendix A for a copy of the
TIR worksheet, maps, and exhibits of the site location.
1.2 Pre-Developed Conditions
Topography
The site is graded flat with a paved parking lot in the existing condition due to it’s
previous development of the adjacent building and consideration for this future building
development.
Soils
The Natural Resources Conservation Service (NRCS) soil survey identified as Everett
Alderwood soil (EwC) with 0% slope.
Groundcover
The property is covered with an mostly paved parking or otherwise covered in hard
surface with minimal amounts of landscaping in the area of the building pad. The offsite
areas are likewise developed or provide small, landscaped areas.
3
Adjacent Land Uses
The site is bounded as follows:
North: Commercial (zoned CE)
East: Commercial (zoned CE)
South: Commercial (zoned CE)
West: Commercial (zoned CE)
Drainage Patterns
The project is located within the Hylebos Creek drainage basin. The stormwater runoff
associated with the project site generally sheet flows within the existing parking area to
1 of 2 conveyance systems.
For further discussion of drainage patterns of the site, see Section 3.0 Level 1
Downstream Analysis.
Critical and Sensitive Areas
SLOPES
No steep slopes exist on or adjacent to the site.
STREAMS
No identified streams exist on or adjacent to the site.
WETLANDS
No identified wetlands exist on or adjacent to the site.
AQUIFER RECHARGE
The property is not located in an aquifer recharge area.
FLOODPLAIN
The proposed development is not located within 300-ft of any identified floodplains.
Other Existing Site Information
Not applicable.
Storm Drainage and Utilities
Stormwater drainage infrastructure was identified onsite during site survey. The water
quality mitigation has been provided for previously constructed pollution generating
surfaces.
1.3 Developed Conditions
Developed Site Description
The proposed improvements consist of a new Commercial building on a lot that has
been prepared for this building with the previous development of the Parcel which
provided all infrastructure for both buildings. Clearing and grading on the lot will be
limited to the area necessary for the construction of the buildings. All roof drainage is to
Figure 2. Soil Map
4
be collected and conveyed within a new roof drainage system which is to collect and
convey runoff from the proposed building roof to the existing conveyance system which
is collected and conveyed downstream of the water quality treatment structures.
Onsite Developed Impervious Area
Structure Roof Area & sidewalk 7,542 SF
The proposed improvements meet the thresholds for Core Requirements 1-9 in addition
to Special Requirements 1-5. Please see the Conditions and Requirements Summary
section for more details.
5
2.0 CONDITIONS AND REQUIREMENTS SUMMARY
Per KCSWDM Figure 1.1.2.A, the project results in 7,542 sq. ft. of new and replaced
impervious surface and therefore requires a Full Drainage Review.
Core Requirement #1 Discharge at a natural location
Under existing conditions, drainage is collected and conveyed to stormwater
infrastructure within S 348th St. The proposed onsite stormwater infrastructure will
maintain this drainage pattern.
Core Requirement #2 Offsite Analysis
A Level 1 downstream analysis can be found in Section 3.0 of this report.
Core Requirement #3 Flow Control
The proposed project has been previously designed for full build out for flow control
mitigation. At the time of this report no As-built or previous drainage report is available
for the original development.
Core Requirement #4 Conveyance System
The proposed roof drainage conveyance system consists of 6-inch ADS N-12 with a
minimum slope of 1.0% to the existing downstream conveyance system.
Core Requirement #5 Erosion and Sediment Control
A Construction SWPPP and TESC Plans are included within this submittal, which satisfy
this requirement.
Core Requirement #6 Maintenance and Operations
Onsite drainage facilities will be maintained and operated by the property owner.
Operation and Maintenance Manual (included with this submittal) will be provided to the
owner to be kept onsite.
Core Requirement #7 Financial Guarantees and Liability
The owner will provide the two financial guarantees listed in the KCSWDM § 1.2.7.
Core Requirement #8 Water Quality
No new pollution generating impervious surface is to be created with the proposed
building.
Core Requirement #9 Flow Control BMPs
There are no existing natural vegetated areas which are suitable for preservation or
utilization for flow control BMPs.
6
Special Requirement #1 Other Adopted Area-Specific Requirements
The site is not within any other adopted area-specific requirements.
Special Requirement #2 Floodplain/Floodway Analysis
No flood hazard areas are located on or adjacent to the project site.
Special Requirement #3 Flood Protection Facilities
No flood protection facilities are proposed or required.
Special Requirement #4 Source Control
The project meets the threshold for requiring Source Control. The project will follow the
requirements set forth in BMP A-3 Storage of Liquid Materials in Portable Containers,
and BMP A-13 Vehicle Washing and Steam Cleaning.
Special Requirement #5 Oil Control
The project does not meet the criteria for oil control, as listed by the 2021 King County
Surface Water Design Manual §1.3.5, as the project is not a high-use site as defined in
the same reference.
7
3.0 OFFSITE ANALYSIS (LEVEL 1 DOWNSTREAM)
3.1 Define and Map Study Area
The project is located within the Hylebos Creek drainage basin. The stormwater runoff
associated with the project site generally sheet flows within the existing parking area to
1 of 2 conveyance systems.
North:
The North parking area is collected via catch basins and routed though an underground
water quality treatment facility to an existing infiltration trench along the north side of
the property.
South:
The South parking area is collected via catch basins and routed through an underground
water quality treatment facility, runoff is then conveyed to the existing system within
South 348th St. where it is conveyed Westerly within S 348th St. to a point ¼ mile
downstream from the site.
3.2 Review All Available Information of the Study Area
All available information regarding existing and potential water quality, runoff volumes
and rates, flooding and stream bank erosion problems within the study area have been
reviewed. Reviewed material included NRSC soil information, the City of Federal Way
Surface Water Management Atlas (2016), and King County GIS maps. See Appendix A
for the delineated study area.
3.3 Field Inspect the Study Area
The Study Area was inspected February 23rd , 2023. No existing erosional features or
flooding problems were identified, and no other problems are expected to occur
because of the proposed development if the appropriate TESC measures and
stormwater mitigation BMPs discussed within this report are properly implemented.
3.4 Existing and Predicted Drainage and Water Quality Issues
There are no known drainage or other associated problems within the current system.
8
4.0 FLOW CONTROL, LOW IMPACT DEVELOPMENT (LID) AND WATER
QUALITY FACILITY ANALYSIS AND DESIGN
4.1 Existing Site Hydrology
The existing Site Hydrology consists of an existing conveyance system which routs
pollution generating surface runoff through underground water quality treatment vaults.
Then routs runoff to the existing system withing S. 348th St.
4.2 Developed Site Hydrology
Roof drainage will be added to the conveyance system for new roof area downspouts.
4.3 On-Site Stormwater Calculations
Not Applicable.
4.4 Flow Control BMPs
Not Applicable.
5.0 CONVEYANCE SYSTEM ANALYSIS AND DESIGN
No new conveyance system other ran roof runoff is proposed with the new building.
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6.0 SPECIAL REPORTS AND STUDIES
No special reports or studies are required for this project.
7.0 OTHER PERMITS
A building permit will be required by Federal Way.
8.0 CSWPP PLAN ANALYSIS AND DESIGN
8.1 ESC Plan Analysis and Design
A TESC plan has been prepared for this lot and can be found in Appendix B.
8.2 SWPPP Plan Design
A SWPPP Plan is included with the submittal.
9.0 BOND QUANTITIES, FACILITY SUMMARIES & DECLARATION OF
COVENANT
Bond quantities are not required for this project.
10.0 OPERATIONS AND MAINTENANCE MANUAL
An Operations and Maintenance Manual is not required for this submittal.
APPENDIX A
General Exhibits and TIR Worksheet
VICINITY MAP
NOT TO SCALE
SITE
PHYSICAL ADDRESS: 4706 97TH ST NW, SUITE 100
GIG HARBOR, WA 98332
MAILING ADDRESS: P.O. BOX 949,
GIG HARBOR, WA 98335
PHONE: (253) 857-5454
EXHIBIT NO.
DATE:
PROJECT:
DRAWN BY:J. BARR
23-015
06.27.2023
1
PRIVATE DEVELOPED
BASIN MAP
1416 S. 348TH ST., COMMERCIAL BUILDING
FEDERAL WAY, WA
PRIVATE AREAS
IMP. AREA: ROOFS/SIDEWALK 7,542 SF (0.17 AC)
PERV. AREA: C, LAWN, FLAT 309 SF (0.007 AC)
GRAPHIC SCALE
1 INCH = 50 FEET (8.5x11)
0 25 50 100
KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL
TECHNICAL INFORMATION REPORT (TIR) WORKSHEET
Part 1 PROJECT OWNER AND
PROJECT ENGINEER
Project Owner
Phone _____
Address
Project Engineer
Company ____
Phone _______
Part 2 PROJECT LOCATION AND
DESCRIPTION
Project Name _
DLS-Permitting
Permit #_____
Location Township
Range _
Section _
Site Address _______
Part 3 TYPE OF PERMIT APPLICATION
□ Land use (e.g.,Subdivision / Short Subd. / UPD)
□ Building (e.g.,M/F / Commercial / SFR)
□ Clearing and Grading
□ Right-of-Way Use
□ Other ___________________________
Part 4 OTHER REVIEWS AND PERMITS1
□ DFW HPA
□ COE CWA 404
□ ECY Dam Safety
□ FEMA Floodplain
□ COE Wetlands
□ Other _________
□ Shoreline
Management
□ Structural
Rockery/Vault/______
□ ESA Section 7
Part 5 PLAN AND REPORT INFORMATION
Technical Information Report
Type of Drainage Review
(check one):
Date (include revision
dates):
Date of Final:
□
□
□
□
□
Full
Targeted
Simplified
Large Project
Directed
Site Improvement Plan (Engr. Plans)
Plan Type (check
one):
Date (include revision
dates):
Date of Final:
□ Full
□ Modified
□ Simplified
Part 6 SWDM ADJUSTMENT APPROVALS
Type (circle one): Standard / Experimental /Blanket
Description: (include conditions in TIR Section 2)
Approved Adjustment No._ _ Date of Approval: __________________________
1 DFW: WA State Dept. of Fish and Wildlife. HPA: hydraulic project approval. COE: (Army) Corps of Engineers. CWA: Clean
Water Act. ECY: WA State Dept. of Ecology. FEMA: Federal Emergency Management Agency. ESA: Endangered Species Act.
2021 Surface Water Design Manual
1
Last revised 7/23/2021
KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL
TECHNICAL INFORMATION REPORT (TIR) WORKSHEET
Part 7 MONITORING REQUIREMENTS
Monitoring Required: Yes / No
Start Date:
Describe:
Completion Date:Re: KCSWDM Adjustment No.
Part 8 SITE COMMUNITY AND DRAINAGE BASIN
Community Plan :________________________________
Special District Overlays:_________________________
Drainage Basin:__________________________________
Stormwater Requirements: _______________________
Part 9 ONSITE AND ADJACENT SENSITIVE AREAS
□ River/Stream □Steep Slope
□ Lake □Erosion Hazard
□ Wetlands □Landslide Hazard
□ Closed Depression □Coal Mine Hazard
□ Floodplain □Seismic Hazard
□ Other □Habitat Protection
□
Part 10 SOILS
Soil Type Slopes Erosion Potential
□ High Groundwater Table (within 5 feet) □ Sole Source Aquifer
□ Other ______________ _______________________ □ Seeps/Springs
□ Additional Sheets Attached
2021 Surface Water Design Manual
2
Last revised 7/23/2021
KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL
TECHNICAL INFORMATION REPORT (TIR) WORKSHEET
Part 11 DRAINAGE DESIGN LIMITATIONS
REFERENCE LIMITATION / SITE CONSTRAINT
□ Core 2 - Offsite Analysis____________________ _________________________________
□ Sensitive/Critical Areas _____________________ _________________________________
□ SEPA _____________________________________ _________________________________
□ LID Infeasibility____________________________ _________________________________
□ Other _____________________________________ _________________________________
□
□ Additional Sheets Attached
Part 12 TIR SUMMARY SHEET (provide one TIR Summary Sheet per Threshold Discharge Area)
Threshold Discharge Area:
(name or description)
Core Requirements (all 8 apply):
Discharge at Natural Location Number of Natural Discharge Locations:
Offsite Analysis Level: 1 / 2 / 3 dated:
Flow Control (include facility Level: 1 / 2 / 3 or Exemption Number ______________
summary sheet)Flow Control BMPs
Conveyance System Spill containment located at:
Erosion and Sediment Control /CSWPP/CESCL/ESC Site Supervisor:
Construction Stormwater
Pollution Prevention Contact Phone:
After Hours Phone:
Maintenance and Operation Responsibility (circle one): Private / Public
If Private, Maintenance Log Required: Yes / No
Financial Guarantees and
Liability
Provided: Yes / No
Water Quality (include facility Type (circle one): Basic / Sens. Lake / Enhanced Basic / Bog
summary sheet)or Exemption No.
Landscape Management Plan: Yes / No
For Entire Project:Total Replaced Impervious surfaces on the site
% of Target Impervious that had a
feasible FCBMP
Total New Pervious Surfaces on the site
Repl. Imp. on site mitigated w/flow control facility
implemented Repl. Imp. on site mitigated w/water quality facility
Repl. Imp. on site mitigated with FCBMP
2021 Surface Water Design Manual
3
Last revised 7/23/2021
KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL
TECHNICAL INFORMATION REPORT (TIR) WORKSHEET
Part 12 TIR SUMMARY SHEET (provide one TIR Summary Sheet per Threshold Discharge Area)
Special Requirements (as applicable):
Area Specific Drainage
Requirements
Type: CDA / SDO / MDP / BP / LMP / Shared Fac. / None
Name:
Floodplain/Floodway Delineation Type (circle one): Major / Minor / Exemption / None
100-year Base Flood Elevation (or range):
Datum:
Flood Protection Facilities Describe:
Source Control
(commercial / industrial land use)
Describe land use:
Describe any structural controls:
Oil Control High-use Site: Yes / No
Treatment BMP:
Maintenance Agreement: Yes / No
with whom?
Other Drainage Structures
Describe:
Part 13 EROSION AND SEDIMENT CONTROL REQUIREMENTS
MINIMUM ESC REQUIREMENTS
DURING CONSTRUCTION
^ Clearing Limits
^ Cover Measures
^ Perimeter Protection
^ Traffic Area Stabilization
^ Sediment Retention
^ Surface Water Collection
^ Dewatering Control
^ Dust Control
^ Flow Control
^ Protection of Flow Control BMP Facilities
(existing and proposed)
^ Maintain BMPs / Manage Project
MINIMUM ESC REQUIREMENTS
AFTER CONSTRUCTION
^ Stabilize exposed surfaces
^ Remove and restore Temporary ESC Facilities
^ Clean and remove all silt and debris, ensure
operation of Permanent Facilities, restore
operation of Flow Control BMP Facilities as
necessary
^ Flag limits of SAO and open space preservation
areas
^ Other
2021 Surface Water Design Manual
4
Last revised 7/23/2021
KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL
TECHNICAL INFORMATION REPORT (TIR) WORKSHEET
Part 14 STORMWATER FACILITY DESCRIPTIONS (Note: Include Facility Summary and Sketch)
Flow Control Type/Description Water Quality Type/Description
□ Detention □Vegetated Flowpath
□ Infiltration □Wetpool
□ Regional Facility □Filtration
□ Shared Facility □Oil Control
□ Flow Control BMPs □Spill Control
□ Other □Flow Control BMPs
□Other
Part 15 EASEMENTS/TRACTS Part 16 STRUCTURAL ANALYSIS
□ Drainage Easement □ Cast in Place Vault
□ Covenant □ Retaining Wall
□ Native Growth Protection Covenant □ Rockery > 4’ High
□ Tract □ Structural on Steep Slope
□ Other □ Other
Part 17 SIGNATURE OF PROFESSIONAL ENGINEER
I, or a civil engineer under my supervision, have visited the site. Actual site conditions as observed were
incorporated into this worksheet and the attached Technical Information Report. To the best of my
knowledge the information provided here is accurate.
Signed/Date
2021 Surface Water Design Manual
5
Last revised 7/23/2021
APPENDIX B
Plan Exhibits
NEW BUILDINGFF=275.50SOUTH 348TH STREETEXISTINGBUILDINGCOVER SHEET VICINITY MAPNOT TO SCALECALL 811 AT LEAST 48HOURS BEFORE YOU DIGVERIFICATION NOTEALL EXISTING UTILITIES IN THE CONSTRUCTION AREA SHALL BEIDENTIFIED AND VERIFIED FOR DEPTH AND LOCATION PRIOR TO ANYCONSTRUCTION ACTIVITIES SO TO IDENTIFY ANY POTENTIAL CONFLICTSWITH PROPOSED CONSTRUCTION. CONTACT PROJECT ENGINEERIMMEDIATELY IF ANY CONFLICTS ARE IDENTIFIED.PRIOR TO ANY CONSTRUCTION ACTIVITIES, VERIFY EXISTINGTOPOGRAPHY IS CONSISTENT WITH WHAT IS SHOWN ON PLANS AND IFTHERE ARE ANY POTENTIAL CONFLICTS WITH PROPOSED CONSTRUCTIONACTIVITIES. CONTACT PROJECT ENGINEER IMMEDIATELY IF ANYCONFLICTS ARE IDENTIFIED.SITE100LEGENDSURVEYPROPOSEDCONTOURSPROPERTY LINE/RIGHT-OF-WAYRIGHT-OF-WAY DEDICATIONRIGHT-OF-WAY CENTERLINEEASEMENTBUILDING SETBACKSTORM DRAIN LINESANITARY SEWER LINEROOF DRAIN LINESANITARY SEWER FORCE MAIN LINECOMMON UTILITY TRENCHOVERHEAD POWER LINEUNDERGROUND POWER LINEGAS LINEWATER LINETYPE 2 CATCHBASINTYPE 1/TYPE 1L CATCHBASINSTORM DRAIN CLEANOUT (SDCO)SANITARY SEWER MANHOLESANITARY SEWER CLEANOUT (SSCO)HYDRANTWATER VALVEWATER METERGAS METER (GM)GAS VALVE (GV)MONUMENTPOWER POLE (PP)GUY WIRE (GW)POWER VAULTTRANSFORMER PADASPHALTCONCRETEGRAVELLIGHT STANDARD/YARD LIGHT (LS/YL)POWER MANHOLE (PMH)1 INCH = 30 FEET (22"x34")GRAPHIC SCALE603001 INCH = 60 FEET (11"x17")SHEET INDEXC1COVER SHEETC2EXISTING CONDITIONC3TESC PLANC4TESC DETAILSC5GRADING & DRAINAGE PLANC6DETAIL GRADINGC7NOTES AND DETAILSARCHITECT/APPLICANTUIL ARCHITECTS1800 136TH PL NE SUITE 207BELLEVUE, WA. 98005(425) 654-5005INFO@UILARCHITECTS.COMGENERAL SITE INFORMATIONSITE ADDRESS:1416 S 348TH STFEDERAL WAY, WA 98003 TOTAL SITE AREA: ±18,911 SF (0.43 ACRES)PROPOSED HARD SURFACE:7,497 SF (0.17 ACRES)PROPOSED PGHS AREA:NATOTAL DISTURBED AREA:±7,405 SF (0.17 ACRES)ZONING: COMMERICIAL ENTERPRISE (CE)PARCEL NUMBER:2021049088EXISTING UTILITY INFORMATION DEPICTED ON THESE PLANS WASOBTAINED FROM BEST AVAILABLE SOURCES AT THE TIME OF DESIGN.CONTRACTOR SHALL BE SOLELY RESPONSIBLE FOR THE RELOCATION OFEXISTING UNDERGROUND CONFLICTING UTILITIES DEPICTED OR NOTDEPICTED ON THESE PLANS.UTILITY NOTESTRENCH NOTESIF WORKERS ENTER ANY TRENCH OR OTHER EXCAVATION FOUR OR MOREFEET IN DEPTH THAT DOES NOT MEET THE OPEN PIT REQUIREMENTS OFWSDOT SECTION 2-09.3(3)B, IT SHALL BE SHORED AND CRIBBED. THECONTRACTOR IS ALONE RESPONSIBLE FOR WORKER SAFETY. ALL TRENCHSAFETY SYSTEMS SHALL MEET THE REQUIREMENTS OF THE WASHINGTONINDUSTRIAL SAFETY AND HEALTH ACT, CHAPTER 49.17 RCW.FILL SPECIFICATIONFILL MATERIAL SHALL NOT CONTAIN PETROLEUM PRODUCTS,OR SUBSTANCES WHICH ARE HAZARDOUS, DANGEROUS,TOXIC, OR WHICH OTHERWISE VIOLATE ANY STATE,FEDERAL, OR LOCAL LAW ORDINANCE, CODE, REGULATION,RULE, ORDER, OR STANDARD. ONLY EARTH MATERIAL SHALLBE PLACED IN FILLS.CIVIL ENGINEER/SURVEYORB. ALLEN PE / STEVE WOODS PLSCONTOUR ENGINEERING LLCP.O. BOX 949 GIG HARBOR, WA 98335(253) 857-5454DATE OF SURVEY: XXXXXXXXLEGAL DESCRIPTIONPARCEL A:A PORTION OF THE WEST HALF OF THE SOUTHEAST QUARTER OF THENORTHEAST QUARTER OF THE SOUTHEAST QUARTER OF SECTION 20,TOWNSHIP 21 NORTH, RANGE 4 EAST, W.M., IN KING COUNTY, WASHINGTON,MORE PARTICULARLY DESCRIBED AS FOLLOWS:BEGINNING AT THE EAST QUARTER CORNER OF SAID SECTION 20;THENCE SOUTH 00%%17636'27" WEST ALONG THE EAST LINE OF SAID SECTION,1324.79 FEET TO THE SOUTHEAST CORNER OF THE NORTHEAST QUARTEROF THE SOUTHEAST QUARTER OF SAID SECTION;THENCE NORTH 89%%17637'36" WEST ALONG THE SOUTH LINE OF THE NORTHEASTQUARTER OF THE SOUTHEAST QUARTER OF SAID SECTION 355.48 FEET;THENCE NORTH 00%%17634'16" EAST 30.00 FEET TO THE NORTH LINE OF SOUTH348TH STREET, SAID POINT BEING THE TRUE POINT OF BEGINNING;THENCE NORTH 89°17637'36" WEST ALONG THE NORTH LINE OF SOUTH 348THSTREET 100.00 FEET TO THE EAST LINE OF THE WEST 200 FEET OF THESOUTHEAST QUARTER OF THE NORTHEAST QUARTER OF OF THE SOUTHEASTQUARTER OF SAID SECTION;THENCE NORTH 00°17632'05" EAST ALONG SAID LINE 222.48 FEET;THENCE SOUTH 89°17637'36" EAST 22.89 FEET;THENCE NORTH 00°17634'16" EAST 5.64 FEET;THENCE SOUTH 89°17637'36" EAST 105.00 FEET, MORE OR LESS,TO THE WEST LINE OF VICK ADDITION, ACCORDING TO THE PLAT RECORDEDIN VOLUME 45 OF PLATS, PAGE 27, IN KING COUNTY, WASHINGTON;THENCE SOUTH 00°17634'16" WEST ALONG THE WEST LINE OF SAID VICK ADDITION70.01 FEET, MORE OR LESS, TO THE NORTHWEST CORNER OF LOT 20,VICK ADDITION;THENCE NORTH 89°17637'36" WEST 27.75 FEET;THENCE SOUTH 00°17634'16" WEST 158.12 FEET TO THE TRUE POINT OF BEGINNING.PARCEL B:THE EAST 85 FEET OF THE WEST 200 FEET OF THE NORTH 222.48 FEETOF THE SOUTH 252.48 FEET OF THE SOUTHEAST QUARTER OF THENORTHEAST QUARTER OF THE SOUTHEAST QUARTER OF SECTION 20,TOWNSHIP 21 NORTH, RANGE 4 EAST, W.M., IN KING COUNTY, WASHINGTON.BASIN OF BEARINGGRID NORTH. BASED UPON GLOBAL POSITIONING SYSTEM (GPS)LAMBERT GRID WASHINGTON STATE NORTH ZONE COORDINATES. ACONVERGENCE ANGLE OF 1°17606'07.15" COUNTERCLOCKWISE WAS APPLIED ATA PUNCH IN A COPPER PLUG IN A CONCRETE POST IN A MONUMENTCASE AT THE NORTHEAST CORNER OF SECTION 20, TOWNSHIP 21 NORTH,RANGE 4 EAST, W.M. THE NORTH AMERICAN DATUM OF 1983/1991(NAD83/91)GRID COORDINATES WERE FOUND TO BE 113211.76 / 1273168.35 ATTHAT POINT. THE INCERSE OF BOTH THE SEA LEVEL CORRECTION FACTOROF 0.999986885 AND THE GRID SCALE FACTOR OF 1.000043137 WAS APPLIEDTO THE GRID COORDINATES FOR SHOWN GROUND DISTANCES.VERTICAL DATUMBASE:CITY OF FEDERAL WAY BENCHMARK #2168-5-1, RAMSET ON EAST EDGEOF A TELEPHONE PEDESTAL PAD AT THE NORTHWEST CORNER OFSOUTH 336TH STREET AND PACIFIC HIGHWAY SOUTH.ELEVATION: 346.81'(NGVD29)SITE #1: CE 501, A SET MAG NAIL AND WASHER NORTH OF THERETAINING WALL ON THE NORTH SIDE OF S 348TH ST AS SHOWN HEREON.ELEVATION: 278.32'(NGVD29)SITE #2: CE 502, A SET MAG NAIL AND WASHER IN THE NORTH PARKINGLOT ONSITE AS SHOWN HEREON.ELEVATION: 274.62'(NGVD29)SURVEYOR'S NOTES1)THE MONUMENT CONTROL SHOWN FOR THIS SITE WAS ACCOMPLISHED BY FIELD TRAVERSE UTILIZING A TWO (2) SECOND THEODOLITE WITH INTEGRAL ELECTRONIC DISTANCE MEASURING METER (TRIMBLE S5)AND REAL TIME KINEMATIC (RTK) GLOBAL POSITIONING SYSTEM (GPS)(TRIMBLE R12I). LINEAR AND ANGULAR CLOSURE OF THE TRAVERSES MEET THE STANDARDS OF WAC 332-130-090.2)UTILITIES OTHER THAN THOSE SHOWN MAY EXIST ON THIS SITE. ONLY THOSE WHICH ARE VISIBLE OR HAVING VISIBLE EVIDENCE OF THEIR INSTALLATION ARE SHOWN HEREON.3)THIS SURVEY REPRESENTS PHYSICAL IMPROVEMENT CONDITIONS AS THEY EXISTED FEBRUARY 23, 2023, THE DATE OF THIS FIELD SURVEY.4)THE LEGAL DESCRIPTION SHOWN HEREON PER STATUTORY WARRANTY DEED 20221003000024. NO ADDITIONAL RESEARCH HAS BEEN ATTEMPTED.5)OFFSET DIMENSIONS SHOWN HEREON ARE MEASURED PERPENDICULAR TO PROPERTY LINES.6)IT IS NOT THE INTENT OF THIS SURVEY TO SHOW EASEMENTS OR RESERVATIONS WHICH MAY EFFECT THIS SITE.7)THE PURPOSE OF THIS SURVEY IS TO SUPPORT FUTURE POTENTIAL DEVELOPMENT.8)ELEVATION CONTOURS SHOWN HEREON ARE DERIVED FROM FIELD MEASUREMENTS AND MEET OR EXCEED THE MINIMUM ACCURACY CRITERIA OF THE NATIONAL MAPPING STANDARD, BEING ONE-HALF THE CONTOUR INTERVAL.DESCRIPTIONREVISION DATE BY
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CLIENT:REV.WMRTSDESIGNER:ENGINEER:DRAWN:DATE:REVISED:PROJECT:DWG NAME:SHEETOFPhone: 253-857-5454 ~ Fax: 253-509-0044 ~ info@contourpllc.com
Mailing Address: P.O. Box 949, Gig Harbor, WA 98335
Physical Address: 4706 97th Street NW, Suite 100, Gig Harbor, WA 98332
CIVIL ENGINEERS ~ SURVEYORS ~ LAND PLANNERS
DANIEL YU (ASSA 2, INC.)
1420 348TH ST.
FEDERAL WAY, 98003
DANIEL YU PHONE:(206) 909-3788 ASSA 2 RETAIL BUILDINGA PORTION OF THE NE 1/4 OF THE SE 1/4 OF SECTION 20, TOWNSHIP 21 N, RANGE 4 E, W.M.,FEDERAL WAY, WASHINGTONJ. BARRB. ALLENJ. BARR2021 N04 E06.29.202323-01523-015-SITE DEV706.29.2023APPROVEDPERMIT NO. XX-XXXXXX-XXDATENOTE:THIS APPROVAL IS VOID 1 (ONE) YEAR AFTERAPPROVAL DATE. THE CITY WILL NOT BE RESPONSIBLEFOR ERRORS AND/OR OMISSIONS ON THESE PLANS.FIELD CONDITIONS MAY DICTATE CHANGES TO THESEPLANS AS DETERMINED BY THE CITY ENGINEER.1C1
EXISTING CONDITIONCALL 811 AT LEAST 48HOURS BEFORE YOU DIGVERIFICATION NOTEALL EXISTING UTILITIES IN THE CONSTRUCTION AREA SHALL BEIDENTIFIED AND VERIFIED FOR DEPTH AND LOCATION PRIOR TO ANYCONSTRUCTION ACTIVITIES SO TO IDENTIFY ANY POTENTIAL CONFLICTSWITH PROPOSED CONSTRUCTION. CONTACT PROJECT ENGINEERIMMEDIATELY IF ANY CONFLICTS ARE IDENTIFIED.PRIOR TO ANY CONSTRUCTION ACTIVITIES, VERIFY EXISTINGTOPOGRAPHY IS CONSISTENT WITH WHAT IS SHOWN ON PLANS AND IFTHERE ARE ANY POTENTIAL CONFLICTS WITH PROPOSED CONSTRUCTIONACTIVITIES. CONTACT PROJECT ENGINEER IMMEDIATELY IF ANYCONFLICTS ARE IDENTIFIED.1 INCH = 20 FEET (22"x34")GRAPHIC SCALE402001 INCH = 40 FEET (11"x17")APPROVEDPERMIT NO. XX-XXXXXX-XXDATENOTE:THIS APPROVAL IS VOID 1 (ONE) YEAR AFTERAPPROVAL DATE. THE CITY WILL NOT BE RESPONSIBLEFOR ERRORS AND/OR OMISSIONS ON THESE PLANS.FIELD CONDITIONS MAY DICTATE CHANGES TO THESEPLANS AS DETERMINED BY THE CITY ENGINEER.DESCRIPTIONREVISION DATE BY
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CLIENT:REV.WMRTSDESIGNER:ENGINEER:DRAWN:DATE:REVISED:PROJECT:DWG NAME:SHEETOFPhone: 253-857-5454 ~ Fax: 253-509-0044 ~ info@contourpllc.com
Mailing Address: P.O. Box 949, Gig Harbor, WA 98335
Physical Address: 4706 97th Street NW, Suite 100, Gig Harbor, WA 98332
CIVIL ENGINEERS ~ SURVEYORS ~ LAND PLANNERS
DANIEL YU (ASSA 2, INC.)
1420 348TH ST.
FEDERAL WAY, 98003
DANIEL YU PHONE:(206) 909-3788 ASSA 2 RETAIL BUILDINGA PORTION OF THE NE 1/4 OF THE SE 1/4 OF SECTION 20, TOWNSHIP 21 N, RANGE 4 E, W.M.,FEDERAL WAY, WASHINGTONJ. BARRB. ALLENJ. BARR2021 N04 E06.29.202323-01523-015-SITE DEV706.29.20232C2
DEMOLISH AND REMOVEEXISTING 6' CYCLONE FENCEPRESERVE AND PROTECTEXISTING ASPHALT PARKINGAREA AND EXTRUDED CURBPRESERVE AND PROTECTEXISTING ASPHALT PARKINGAREA AND EXTRUDED CURBDEMOLISH AND REMOVEASPHALT AND EXTRUDED CURBDEMOLISH AND REMOVEASPHALT, CURB GUTTERAND SIDEWALKTESC PLANCALL 811 AT LEAST 48HOURS BEFORE YOU DIGVERIFICATION NOTEALL EXISTING UTILITIES IN THE CONSTRUCTION AREA SHALL BEIDENTIFIED AND VERIFIED FOR DEPTH AND LOCATION PRIOR TO ANYCONSTRUCTION ACTIVITIES SO TO IDENTIFY ANY POTENTIAL CONFLICTSWITH PROPOSED CONSTRUCTION. CONTACT PROJECT ENGINEERIMMEDIATELY IF ANY CONFLICTS ARE IDENTIFIED.PRIOR TO ANY CONSTRUCTION ACTIVITIES, VERIFY EXISTINGTOPOGRAPHY IS CONSISTENT WITH WHAT IS SHOWN ON PLANS AND IFTHERE ARE ANY POTENTIAL CONFLICTS WITH PROPOSED CONSTRUCTIONACTIVITIES. CONTACT PROJECT ENGINEER IMMEDIATELY IF ANYCONFLICTS ARE IDENTIFIED.1 INCH = 20 FEET (22"x34")GRAPHIC SCALE402001 INCH = 40 FEET (11"x17")CONSTRUCTION SEQUENCE1.HOLD A PRE-CONSTRUCTION MEETING WITH THE CITY AND OBTAINREQUIRED PERMITS.2.FIELD LOCATE AND VERIFY ALL EXISTING SERVICES AND UTILITIESWITHIN THE PROJECT AREA. SEE VERIFICATION NOTE ON PLANSHEETS. FIELD VERIFY HORIZONTAL AND VERTICAL LOCATIONS OFUTILITIES AND UTILITY CONNECTIONS AND PROVIDE INFORMATION TOPROJECT ENGINEER.3.ESTABLISH CLEARING AND GRADING LIMITS.4.CONSTRUCT PERIMETER SILT FENCES AND OTHER EROSION CONTROLMEASURES AS NEEDED.5.SCHEDULE CLEARING LIMITS AND EROSION CONTROL INSPECTIONSWITH THE CITY.6.POTHOLE ALL EXISTING UTILITIES WITHIN CONSTRUCTION AREA.7.DEMOLISH AND REMOVE EXISTING STRUCTURES, ROADS, ANDUTILITIES.8.CONSTRUCT IMPROVEMENTS PER PLANS.9.STABILIZE ALL EXPOSED SOILS.10.ARRANGE FINAL INSPECTION WITH THE CITY.11.ON-SITE SILTATION FENCE TO REMAIN UNTIL THE SITE IS STABILIZEDTO THE APPROVAL OF THE CITY INSPECTOR.12.REMOVE TESC MEASURES WHEN ALLOWED BY THE CITY INSPECTOR.INLET PROTECTION NOTEINLET PROTECTION SHALL BE INSTALLED IN ALLEXISTING INLETS DOWNSTREAM AND WITHIN500-FT OF SITE DISTURBED AREAS, AND IN ALL NEWINLETS BOTH ON-SITE AND OFF-SITETESC LEGENDINLET PROTECTIONSEE DETAIL 2, SHEET C4CLEARING LIMITS (0.18 AC)PRESERVE AND PROTECTAS NOTEDCONSTRUCTION ENTRANCESEE DETAIL 1, SHEET C4DEMOLISH AND REMOVE ASNOTED. MAY REQUIRESEPARATE PERMITFILTER FABRIC FENCESEE DETAIL 3, SHEET C4PRESERVE AND PROTECT ASNOTED1.THE FOLLOWING SEED MIXTURE SHALL BE AS BELOW AND SHALL BEAPPLIED AT THE RATE RECOMMENDED BY THE SUPPLIER2.SEED BEDS PLANTED BETWEEN MAY 1 AND OCTOBER 31 WILL REQUIREIRRIGATION AND OTHER MAINTENANCE AS NECESSARY TO FOSTER ANDPROTECT THE ROOT STRUCTURE.3.FOR SEED BEDS PLANTED BETWEEN OCTOBER 31 AND APRIL 30, ARMORINGOF THE SEED BED WILL BE NECESSARY. (E.G., GEOTEXTILES, JUTE MAT,CLEAR PLASTIC COVERING).4.BEFORE SEEDING, INSTALL NEEDED SURFACE RUNOFF CONTROL MEASURESSUCH AS GRADIENT TERRACES, INTERCEPTOR DIKES, SWALES, LEVELSPREADERS AND SEDIMENT BASINS.5.THE SEEDBED SHALL BE FIRM WITH A FAIRLY FINE SURFACE, FOLLOWINGSURFACE ROUGHENING. PERFORM ALL OPERATIONS ACROSS OR AT RIGHTANGLES TO THE SLOPE.6.FERTILIZERS ARE TO BE USED ACCORDING TO SUPPLIER'SRECOMMENDATIONS. AMOUNTS USED SHOULD BE MINIMIZED, ESPECIALLYADJACENT TO WATER BODIES AND WETLANDS.7.THE CONTRACTOR WILL CHECK ALL SEEDED OR SODDED AREAS REGULARLYTO ENSURE THAT THE VEGETATIVE IS BEING ADEQUATELY ESTABLISHED.AREAS WILL BE REPAIRED, RESEEDED, AND FERTILIZED AS REQUIRED.SEEDING NOTESChewings or annual blue grass (Festucarubra var. commutata or Poa anna)Perennial rye (Lolium perenne)Redtop or colonial bentgrass (Agrostisalba or Agrostis tenuis)White dutch clover (Trifolium repens)TABLE 3.2. TEMPORARY EROSION CONTROL SEED MIX% Purity% Germination4050559892989890908590% WeightSOIL AMENDMENT NOTEALL DISTURBED SOILS SHALL BE AMENDED PERSOIL AMENDMENT NOTE ON SHEET C4.DEMOLITION NOTEBUILDING DEMOLITION COMPLETED UNDERSEPARATE PERMIT.APPROVEDPERMIT NO. XX-XXXXXX-XXDATENOTE:THIS APPROVAL IS VOID 1 (ONE) YEAR AFTERAPPROVAL DATE. THE CITY WILL NOT BE RESPONSIBLEFOR ERRORS AND/OR OMISSIONS ON THESE PLANS.FIELD CONDITIONS MAY DICTATE CHANGES TO THESEPLANS AS DETERMINED BY THE CITY ENGINEER.DESCRIPTIONREVISION DATE BY
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CLIENT:REV.WMRTSDESIGNER:ENGINEER:DRAWN:DATE:REVISED:PROJECT:DWG NAME:SHEETOFPhone: 253-857-5454 ~ Fax: 253-509-0044 ~ info@contourpllc.com
Mailing Address: P.O. Box 949, Gig Harbor, WA 98335
Physical Address: 4706 97th Street NW, Suite 100, Gig Harbor, WA 98332
CIVIL ENGINEERS ~ SURVEYORS ~ LAND PLANNERS
DANIEL YU (ASSA 2, INC.)
1420 348TH ST.
FEDERAL WAY, 98003
DANIEL YU PHONE:(206) 909-3788 ASSA 2 RETAIL BUILDINGA PORTION OF THE NE 1/4 OF THE SE 1/4 OF SECTION 20, TOWNSHIP 21 N, RANGE 4 E, W.M.,FEDERAL WAY, WASHINGTONJ. BARRB. ALLENJ. BARR2021 N04 E06.29.202323-01523-015-SITE DEV706.29.20233C3
TESC DETAILS SILT FENCE NOTES1.THE CONTRACTOR SHALL INSTALL AND MAINTAIN TEMPORARY SILT FENCES AT THE LOCATIONS SHOWN IN THEPLANS.2.CONSTRUCT SILT FENCES IN AREAS OF CLEARING, GRADING, OR DRAINAGE PRIOR TO STARTING THOSEACTIVITIES.3.THE SILT FENCE SHALL HAVE A 2 FEET MIN. AND 2.5 FEET MAX. HEIGHT ABOVE THE ORIGINAL GROUND SURFACE.4.THE FILTER FABRIC SHALL BE SEWN TOGETHER AT THE POINT OF MANUFACTURE TO FORM FILTER FABRICLENGTHS AS REQUIRED. LOCATE ALL SEWN SEAMS AT SUPPORT POSTS. ALTERNATIVELY, TWO SECTIONS OF SILTFENCE CAN BE OVERLAPPED, PROVIDED THE CONTRACTOR CAN DEMONSTRATE, TO THE SATISFACTION OF THEENGINEER, THAT THE OVERLAP IS LONG ENOUGH AND THAT THE ADJACENT FENCE SECTIONS ARE CLOSE ENOUGHTOGETHER TO PREVENT SILT LADEN WATER FROM ESCAPING THROUGH THE FENCE AT THE OVERLAP.5.ATTACH THE FILTER FABRIC ON THE UP-SLOPE SIDE OF THE POSTS AND SECURE WITH STAPLES, WIRE, OR INACCORDANCE WITH THE MANUFACTURER'S RECOMMENDATIONS. ATTACH THE FILTER FABRIC TO THE POSTS IN AMANNER THAT REDUCES THE POTENTIAL FOR TEARING.6.SUPPORT THE FILTER FABRIC WITH WIRE OR PLASTIC MESH, DEPENDENT ON THE PROPERTIES OF THEGEOTEXTILE SELECTED FOR USE. IF WIRE OR PLASTIC MESH IS USED, FASTEN THE MESH SECURELY TO THEUP-SLOPE SIDE OF THE POSTS WITH THE FILTER FABRIC UP-SLOPE OF THE MESH.7.MESH SUPPORT, IF USED, SHALL CONSIST OF STEEL WIRE WITH A MAXIMUM MESH SPACING OF 2 INCHES, OR APREFABRICATED POLYMERIC MESH. THE STRENGTH OF THE WIRE OR POLYMERIC MESH SHALL BE EQUIVALENT TOOR GREATER THAN 180 POUNDS GRAB TENSILE STRENGTH. THE POLYMERIC MESH MUST BE AS RESISTANT TOTHE SAME LEVEL OF ULTRAVIOLET RADIATION AS THE FILTER FABRIC IT SUPPORTS.8.BURY THE BOTTOM OF THE FILTER FABRIC 8 INCHES MIN. BELOW THE GROUND9.SURFACE. BACKFILL AND TAMP SOIL IN PLACE OVER THE BURIED PORTION OF THE FILTER FABRIC, SO THAT NOFLOW CAN PASS BENEATH THE FENCE AND SCOURING CANNOT OCCUR. THE WIRE OR POLYMERIC MESH SHALLEXTEND INTO THE GROUND 3 INCHES MIN.10.DRIVE OR PLACE THE FENCE POSTS INTO THE GROUND 18 INCHES MINIMUM. A 12-INCH MINIMUM DEPTH ISALLOWED IF TOPSOIL OR OTHER SOFT SUBGRADE SOIL IS NOT PRESENT AND 18 INCHES CANNOT BE REACHED.INCREASE FENCE POST MIN. DEPTHS BY 6 INCHES IF THE FENCE IS LOCATED ON SLOPES OF 3H:1V OR STEEPERAND THE SLOPE IS PERPENDICULAR TO THE FENCE. IF REQUIRED POST DEPTHS CANNOT BE OBTAINED, THEPOSTS SHALL BE ADEQUATELY SECURED BY BRACING OR GUYING TO PREVENT OVERTURNING OF THE FENCE DUETO SEDIMENT LOADING.11.USE WOOD, STEEL, OR EQUIVALENT POSTS. THE SPACING OF THE SUPPORT POSTS SHALL BE A MAXIMUM OF 6FEET. POSTS SHALL CONSIST OF EITHER:− WOOD WITH DIMENSIONS OF 2-INCHES BY 2-INCHES WIDE MIN. AND A 3-FEET MIN. LENGTH. WOOD POSTS SHALL BE FREE OF DEFECTS SUCH AS KNOTS, SPLITS, OR GOUGES.− NO. 6 STEEL REINFORCEMENT BAR OR LARGER.− ASTM A 120 STEEL PIPE WITH A MINIMUM DIAMETER OF 1 INCH.− U, T, L, OR C SHAPE STEEL POSTS WITH A MINIMUM WEIGHT OF 1.35 POUNDS/FEET.− OTHER STEEL POSTS HAVING EQUIVALENT STRENGTH AND BENDING RESISTANCE TO THE POST SIZES LISTED ABOVE.12.LOCATE SILT FENCES ON CONTOUR AS MUCH AS POSSIBLE, EXCEPT AT THE ENDS OF THE FENCE, WHERE THEFENCE SHALL BE TURNED UPHILL SUCH THAT THE SILT FENCE CAPTURES THE RUNOFF WATER AND PREVENTSWATER FROM FLOWING AROUND THE END OF THE FENCE.13.IF THE FENCE MUST CROSS CONTOURS, WITH THE EXCEPTION OF THE ENDS OF THE FENCE, PLACE GRAVELCHECK DAMS PERPENDICULAR TO THE BACK OF THE FENCE TO MINIMIZE CONCENTRATED FLOW AND EROSION.THE SLOPE OF THE FENCE LINE WHERE CONTOURS MUST BE CROSSED SHALL NOT BE STEEPER THAN 3H:1V.− GRAVEL CHECK DAMS SHALL BE APPROXIMATELY 1 FOOT DEEP AT THE BACK OF THE FENCE. GRAVEL CHECK DAMS SHALL BE CONTINUED PERPENDICULAR TO THE FENCE AT THE SAME ELEVATION UNTIL THE TOP OF THE CHECK DAM INTERCEPTS THE GROUND SURFACE BEHIND THE FENCE.− GRAVEL CHECK DAMS SHALL CONSIST OF CRUSHED SURFACING BASE COURSE, GRAVEL BACKFILL FOR WALLS, OR SHOULDER BALLAST. GRAVEL CHECK DAMS SHALL BE LOCATED EVERY 10 FEET ALONG THE FENCE WHERE THE FENCE MUST CROSS CONTOURS.SILT FENCE INSTALLATION USING THE SLICING METHOD SPECIFICATION DETAILS FOLLOW:1.THE BASE OF BOTH END POSTS MUST BE AT LEAST 2 TO 4 INCHES ABOVE THE TOP OF THE FILTER FABRIC ONTHE MIDDLE POSTS FOR DITCH CHECK DAMS TO DRAIN PROPERLY. USE A HAND LEVEL OR STRING LEVEL, IFNECESSARY, TO MARK BASE POINTS BEFORE INSTALLATION.2.INSTALL POSTS 3 TO 4 FEET APART IN CRITICAL RETENTION AREAS AND 6 TO 7 FEET APART IN STANDARDAPPLICATIONS. INSTALL POSTS 24 INCHES DEEP ON THE DOWNSTREAM SIDE OF THE SILT FENCE, AND AS CLOSEAS POSSIBLE TO THE FILTER FABRIC, ENABLING POSTS TO SUPPORT THE FILTER FABRIC FROM UPSTREAM WATERPRESSURE.3.INSTALL POSTS WITH THE NIPPLES FACING AWAY FROM THE FILTER FABRIC.4.ATTACH THE FILTER FABRIC TO EACH POST WITH THREE TIES, ALL SPACED WITHIN THE TOP 8 INCHES OF THEFILTER FABRIC. ATTACH EACH TIE DIAGONALLY 45 DEGREES THROUGH THE FILTER FABRIC, WITH EACHPUNCTURE AT LEAST 1 INCH VERTICALLY APART. EACH TIE SHOULD BE POSITIONED TO HANG ON A POST NIPPLEWHEN TIGHTENING TO PREVENT SAGGING.5.WRAP APPROXIMATELY 6 INCHES OF FABRIC AROUND THE END POSTS AND SECURE WITH THREE TIES.6.NO MORE THAN 24 INCHES OF A 36-INCH FILTER FABRIC IS ALLOWED ABOVE GROUND LEVEL, 12 INCHES MUST BEBURIED.7.COMPACT THE SOIL IMMEDIATELY NEXT TO THE FILTER FABRIC WITH THE FRONT WHEEL OF THE TRACTOR, SKIDSTEER, OR ROLLER EXERTING AT LEAST 60 POUNDS PER SQUARE INCH. COMPACT THE UPSTREAM SIDE FIRSTAND THEN EACH SIDE TWICE FOR A TOTAL OF FOUR TRIPS. CHECK AND CORRECT THE SILT FENCE INSTALLATIONFOR ANY DEVIATION BEFORE COMPACTION. USE A FLAT-BLADED SHOVEL TO TUCK FABRIC DEEPER INTO THEGROUND IF NECESSARY.PLASTIC COVERING NOTESPLASTIC SLOPE COVER MUST BE INSTALLED AS FOLLOWS:1.RUN PLASTIC UP AND DOWN SLOPE, NOT ACROSS SLOPE.·PLASTIC MAY BE INSTALLED PERPENDICULAR TO A SLOPE IF THE SLOPE LENGTH ISLESS THAN 10 FEET.·MINIMUM OF 8-INCH OVERLAP AT SEAMS.·ON LONG OR WIDE SLOPES, OR SLOPES SUBJECT TO WIND, TAPE ALL SEAMS.·PLACE PLASTIC INTO A SMALL (12-INCH WIDE BY 6-INCH DEEP) SLOT TRENCH ATTHE TOP OF THE SLOPE AND BACKFILL WITH SOIL TO KEEP WATER FROMFLOWING UNDERNEATH.·PLACE SAND FILLED BURLAP OR GEOTEXTILE BAGS EVERY 3 TO 6 FEET ALONGSEAMS AND TIE THEM TOGETHER WITH TWINE TO HOLD THEM IN PLACE.·INSPECT PLASTIC FOR RIPS, TEARS, AND OPEN SEAMS REGULARLY AND REPAIRIMMEDIATELY. THIS PREVENTS HIGH VELOCITY RUNOFF FROM CONTACTING BARESOIL WHICH CAUSES EXTREME EROSION.·SANDBAGS MAY BE LOWERED INTO PLACE TIED TO ROPES. HOWEVER, ALLSANDBAGS MUST BE STAKED IN PLACE.2.PLASTIC SHEETING SHALL HAVE A MINIMUM THICKNESS OF 6 MIL.3.IF EROSION AT THE TOE OF A SLOPE IS LIKELY, A GRAVEL BERM, RIPRAP, OR OTHERSUITABLE PROTECTION SHALL BE INSTALLED AT THE TOE OF THE SLOPE IN ORDERTO REDUCE THE VELOCITY OF RUNOFF.GRADING AND TESC NOTES1.ALL REQUIRED SEDIMENTATION AND EROSION CONTROL FACILITIES MUST BE CONSTRUCTED AND IN OPERATIONPRIOR TO ANY LAND CLEARING AND/OR OTHER CONSTRUCTION TO ENSURE THAT SEDIMENT LADEN WATER DOESNOT ENTER ANY EXISTING DRAINAGE SYSTEM. THE CONTRACTOR SHALL SCHEDULE AN INSPECTION OF THE EROSIONCONTROL FACILITIES PRIOR TO ANY LAND CLEARING AND/OR OTHER CONSTRUCTION. ALL EROSION AND SEDIMENTFACILITIES SHALL BE MAINTAINED IN A SATISFACTORY CONDITION AS DETERMINED BY THE CITY, UNTIL SUCH TIMETHAT CLEARING AND/OR CONSTRUCTION IS COMPLETED AND THE POTENTIAL FOR ON-SITE EROSION HAS PASSED.THE IMPLEMENTATION, MAINTENANCE, REPLACEMENT, AND ADDITIONS TO THE EROSION AND SEDIMENTATIONCONTROL SYSTEMS SHALL BE THE RESPONSIBILITY OF THE PERMITTEE.2.THE EROSION AND SEDIMENTATION CONTROL SYSTEM FACILITIES DEPICTED ON THESE PLANS ARE INTENDED TO BEMINIMUM REQUIREMENTS TO MEET ANTICIPATED SITE CONDITIONS. AS CONSTRUCTION PROGRESSES ANDUNEXPECTED OR SEASONAL CONDITIONS DICTATE, FACILITIES WILL BE NECESSARY TO ENSURE COMPLETESILTATION CONTROL ON THE SITE. DURING THE COURSE OF CONSTRUCTION, IT SHALL BE THE OBLIGATION ANDRESPONSIBILITY OF THE PERMITTEE TO ADDRESS ANY NEW CONDITIONS THAT MAY BE CREATED BY HIS ACTIVITIESAND TO PROVIDE ADDITIONAL FACILITIES, OVER AND ABOVE THE MINIMUM REQUIREMENTS, AS MAY BE NEEDED TOPROTECT ADJACENT PROPERTIES, SENSITIVE AREAS, NATURAL WATER COURSES, AND/OR STORM DRAINAGESYSTEMS.3.NO TEMPORARY OR PERMANENT STOCKPILING OF MATERIALS OR EQUIPMENT SHALL OCCUR WITHIN CRITICAL AREASOR ASSOCIATED BUFFERS, OR THE CRITICAL ROOT ZONE FOR VEGETATION PROPOSED FOR RETENTION.CONSTRUCTION ENTRANCE NOTES1.MATERIAL SHALL BE 4" TO 8" QUARRY SPALLS ( 4 TO 6 INCH FOR RESIDENTIAL SINGLE FAMILY LOTS) AND MAYBE TOP-DRESSED WITH 1 TO 3 INCH ROCK.2.THE ROCK PAD SHALL BE AT LEAST 12" THICK AND 100' LONG (REDUCED TO 20 FEET FOR SITES LESS THAN 1ACRE OF DISTURBED SOIL) WIDTH SHALL BE FULL WIDTH OF INGRESS AND EGRESS AREA. SMALLER PADS MAYBE APPROVED FOR SINGLE-FAMILY RESIDENTIAL AND COMMERCIAL SITES .3.ADDITIONAL ROCK SHALL BE ADDED PERIODICALLY TO MAINTAIN FUNCTION OF THE PAD.4.IF THE PAD DOES NOT ADEQUATELY REMOVE MUD FROM THE VEHICLE WHEELS, THE WHEELS SHALL BE HOSEDOFF BEFORE THE VEHICLE ENTERS A PAVED STREET.THE WASHING SHALL BE DONE ON AN AREA COVEREDWITH CRUSHED ROCK AND WASH WATER SHALL DRAIN TO A SEDIMENT RETENTION FACILITY OR THROUGH ASILT FENCE PER WSDOT SPECIFICATION 9-33 CONSTRUCTION GEOTEXTILES.5.CRUSHED CONCRETE, CEMENT OR CALCIUM CHLORIDE FOR CONSTRUCTION ENTRANCE STABILIZATION IS NOTALLOWED.6.A SEPARATION GEOTEXTILE SHALL BE PLACED UNDER THE SPALLS TO PREVENT FINE SEDIMENT FROM PUMPINGUP INTO THE ROCK PAD. THE GEOTEXTILE SHALL MEET THE FOLLOWING STANDARDS:- GRAB TENSILE STRENGTH (ASTM D4751): 200 PSI MINIMUM- GRAB TENSILE ELONGATION (ASTM D4632): 30 PERCENT MAXIMUM- MULLEN BURST STRENGTH (ASTM D3786-80A): 400 PSI MINIMUM- AOS (ASTM D4751): 20 TO 45 (U.S. STANDARD SIEVE SIZE).1.ON-SITE EROSION CONTROL MEASURES SHALL BE THE RESPONSIBILITY OF THE DEVELOPER. ANYPROBLEMS OCCURRING BEFORE FINAL ACCEPTANCE OF THE STORM SYSTEM BY THE MUNICIPALITYSHALL BE CORRECTED BY THE APPLICANT AND/OR THE CONTRACTOR.2.IN CASE EROSION OR SEDIMENTATION OCCURS TO ADJACENT PROPERTY, ALL CONSTRUCTION WORKWITHIN THE DEVELOPMENT THAT WILL AGGRAVATE THE SITUATION MUST CEASE AND THEAPPLICANT/CONTRACTOR SHALL IMMEDIATELY COMMENCE RESTORATION OR MITIGATION MEASURES.RESTORATION ACTIVITY SHALL CONTINUE UNTIL SUCH TIME AS THE PROBLEM IS RECTIFIED.3.ALL EROSION AND SEDIMENTATION CONTROL DEVICES SHOWN ON THIS DRAWING SHALL BEINSTALLED PRIOR TO OR AS THE FIRST STAGE OF SITE PREPARATION.4.SHOULD THE TEMPORARY EROSION AND SEDIMENTATION CONTROL MEASURES AS SHOWN ON THISDRAWING NOT PROVE ADEQUATE TO CONTROL EROSION AND SEDIMENTATION, THEAPPLICANT/CONTRACTOR SHALL INSTALL ADDITIONAL FACILITIES AS NECESSARY TO PROTECTADJACENT PROPERTIES, SENSITIVE AREAS, NATURAL WATER COURSES, AND/OR STORM DRAINAGESYSTEMS.5.IN ANY AREA WHICH HAS BEEN STRIPPED OF VEGETATION OR EXPERIENCED LAND DISTURBINGACTIVITIES AND WHERE NO FURTHER WORK IS ANTICIPATED FOR A PERIOD EXCEEDING THE LISTEDCRITERIA, ALL DISTURBED AREAS MUST BE IMMEDIATELY STABILIZED WITH MULCHING, GRASSPLANTING, OR OTHER APPROVED EROSION CONTROL TREATMENT APPLICABLE TO THE TIME OF YEAR INQUESTION. GRASS SEEDING ALONE WILL BE ACCEPTABLE ONLY DURING THE MONTHS OF APRILTHROUGH SEPTEMBER, INCLUSIVE. SEEDING MAY PROCEED, HOWEVER, WHENEVER IT IS IN THEINTEREST OF THE APPLICANT/CONTRACTOR, BUT MUST BE AUGMENTED WITH MULCHING, NETTING, OROTHER TREATMENT. CRITERIA FOR EXPOSURE OF DISTURBED SURFACES FROM CHAPTER 8 OF THEPIERCE COUNTY STORMWATER MANAGEMENT MANUAL SHALL BE LISTED HERE BY THE ENGINEER.6.THE PROJECT ENGINEER OR PROJECT SURVEYOR WILL BE RESPONSIBLE FOR FIELD LOCATING THECLEARING LIMITS AND ESTABLISHING THOSE BOUNDARIES WITH BRIGHT COLORED FLAGGING. THECONTRACTOR SHALL CLEAR TO THE LIMITS AS ESTABLISHED ON THIS PLAN AND AS FLAGGED IN THEFIELD.7.THE CITY SHALL BE RESPONSIBLE FOR THE INSPECTION AND ACCEPTANCE OF ALL CLEARING ANDGRADING WORK AND EROSION AND SEDIMENTATION CONTROL FACILITIES. THE APPLICANT AND/ORCONTRACTOR SHALL NOTIFY THE CITY FORTY-EIGHT HOURS IN ADVANCE OF EACH REQUIRED EROSIONAND SEDIMENT CONTROL INSPECTION.INSPECTION NO. 1 - INSTALLATION OF EROSION CONTROL FACILITIES/PRIOR TO CLEARING.INSPECTION NO. 2 - COMPLETION OF CLEARING.INSPECTION NO. 3 - UPON COMPLETION OF EXCAVATION, FILLING, AND EARTHWORK.INSPECTION NO. 4 - COMPLETION OF PROJECT.INSPECTION NO. 5 - AS NEEDED TO DETERMINE COMPLIANCE WITH APPROVED PLANS AND/ORSPECIFICATIONS. (DOES NOT REQUIRE ADVANCE NOTICE.)8.ALL WORK ASSOCIATED WITH STABILIZING THE DISTURBED AREAS SHALL BE IN ACCORDANCE WITHTHE KING COUNTY STORMWATER MANAGEMENT MANUAL.9.ALL NECESSARY FACILITIES SHALL BE MAINTAINED ON SITE TO PREVENT DEBRIS, DUST, AND MUDFROMACCUMULATING ON THE PUBLIC RIGHT-OF-WAY.10.CONTRACTOR SHALL LEAVE THE INFILTRATION SYSTEM OFFLINE (DOES NOT RECEIVE STORMWATER)UNTIL THE SITE IS SUBSTANTIALLY STABILIZED OR AT THE APPROVAL OF THE ENGINEER. UNDER NOCIRCUMSTANCES IS CONCRETE WASH OUT WATER OR HEAVY SEDIMENTS TO BE ALLOWED IN STORMSYSTEM.STANDARD EROSION CONTROL NOTESNOT TO SCALECONSTRUCTION ENTRANCE1NOT TO SCALESILT FENCE DETAIL3NOTE: IF TO BE USED AS HIGH VISIBILIY FENCE,IT SHALL BE 4 FT. MIN. HIGH FROM SURFACEGRADE AND MUST BE HIGHLY VISIBLE.NOT TO SCALEINLET PROTECTION DETAIL2OVERFLOW BYPASS5" MAX.TRIMGRATE FRAMEFILTEREDWATERSEDIMENT AND DEBRIS(PROVIDE 5 CF OF STORAGE)DRAINAGE GRATEBELOW INLET GRATE DEVICEOVERFLOW BYPASS (TYP.)DRAINAGE GRATE~ RECTANGULAR GRATE SHOWNRETRIEVAL SYSTEM (TYP.)BELOW INLET GRATE DEVICEINLET PROTECTION NOTES1.FILTERS SHALL BE INSPECTED AFTER EACH STORM EVENT AND CLEANED ORREPLACED WHEN 1/3 FULL.2.ALL CATCH BASINS WITHIN 500' DOWNSLOPE OF PROJECT SITE SHALL INSTALLINLET PROTECTION, AS WELL AS ANY OTHER CATCH BASINS THAT COULDPOSSIBLE RECEIVE RUNOFF FROM THE CONSTRUCTION SITE SHALL HAVE INLETPROTECTION INSTALLED AND MAINTAINEDAMENDED SOILS NOTE·SOIL AMENDMENTS ARE REQUIRED FOR ALL DISTURBED AREAS IN ACCORDANCE WITH BMP L613:POST-CONSTRUCTION SOIL QUALITY AND DEPTH OF THE 2012 SURFACE WATER MANAGEMENTMANUAL·AMENDED SOILS SHALL BE A MINIMUM OF 8" (NON-COMPACTED) WITH SUBSOILS SCARIFIED ATLEAST 4" WITH INCORPORATION OF THE UPPER MATERIAL TO AVOID STRATIFIED LAYERS, WHEREFEASIBLE.·QUALITY OF COMPOST AND OTHER MATERIALS USED TO MEET THE ORGANIC CONTENTREQUIREMENTS ARE AS FOLLOWS:A.THE ORGANIC CONTENT FOR “PRE-APPROVED” AMENDMENT RATES CAN BE MET ONLY USINGCOMPOST THAT MEETS THE DEFINITION OF “COMPOSTED MATERIALS” IN WAC 173-350-220.THE WAC IS AVAILABLE ONLINE AT:HTTP://WWW.ECY.WA.GOV/PROGRAMS/SWFA/FACILITIES/350.HTML THE COMPOST MUST ALSOHAVE AN ORGANIC MATTER CONTENT OF 35% TO 65%, AND A CARBON TO NITROGEN RATIOBELOW 25:1. THE CARBON TO NITROGEN RATIO MAY BE AS HIGH AS 35:1 FOR PLANTINGSCOMPOSED ENTIRELY OF PLANTS NATIVE TO THE PUGET SOUND LOWLANDS REGION.B.CALCULATED AMENDMENT RATES MAY BE MET THROUGH USE OF COMPOSTED MATERIALS ASDEFINED ABOVE; OR OTHER ORGANIC MATERIALS AMENDED TO MEET THE CARBON TONITROGEN RATIO REQUIREMENTS, AND MEETING THE CONTAMINANT STANDARDS OF GRADEA COMPOST.·USE ONE OF THE FOLLOWING OPTIONS TO MEET THE POST CONSTRUCTION SOIL QUALITY ANDDEPTH REQUIREMENTS. USE THE MOST RECENT VERSION OF "GUIDELINES FOR RESOURCES FORIMPLEMENTING SOIL QUALITY AND DEPTH BMP T5.13" TO MEET THE REQUIREMENTS OF THIS BMP.THIS GUIDANCE CAN BE FOUND ONLINE AT: WWW.SOILSFORSALMON.ORGA.LEAVE NATIVE VEGETATION AND SOIL UNDISTURBED, AND PROTECT FROM COMPACTIONDURING CONSTRUCTIONB.AMEND EXISTING SITE TOPSOIL OR SUBSOIL EITHER AT DEFAULT "PRE-APPROVED" RATES, ORAT CUSTOM CALCULATED RATES BASED ON SPECIFIERS TESTS OF THE SOIL AND AMENDMENTC.STOCKPILE EXISTING TOPSOIL DURING GRADING, AND REPLACE IT PRIOR TO PLANTING.STOCKPILED TOPSOIL MUST ALSO BE AMENDED IF NEEDED TO MEET THE ORGANIC MATTEROR DEPTH REQUIREMENTS, EITHER AT A DEFAULT "PRE-APPROVED" RATE OR AT A CUSTOMCALCULATED RATE.D.IMPORT TOPSOIL MIX OF SUFFICIENT ORGANIC CONTENT AND DEPTH TO MEET THEREQUIREMENTS. MORE THAN ONE METHOD MAY BE USED ON DIFFERENT PORTIONS OF THESAME SITE. SOIL THAT ALREADY MEETS THE DEPTH AND ORGANIC MATTER QUALITYSTANDARDS, AND IS NOT COMPACTED, DOES NOT NEED TO BE AMENDED.·AMENDED SOILS SHALL BE MAINTAINED AS FOLLOWS:A.SOIL QUALITY AND DEPTH SHOULD BE ESTABLISHED TOWARD THE END OF CONSTRUCTIONAND ONCE ESTABLISHED, SHOULD BE PROTECTED FROM COMPACTION, SUCH AS FROM LARGEMACHINERY USE, AND FROM EROSION.B.SOIL SHOULD BE PLANTED AND MULCHED AFTER INSTALLATION.C.PLANT DEBRIS OR ITS EQUIVALENT SHOULD BE LEFT ON THE SOIL SURFACE TO REPLENISHORGANIC MATTER.D.IT SHOULD BE POSSIBLE TO REDUCE USE OF IRRIGATION, FERTILIZERS, HERBICIDES ANDPESTICIDES. THESE ACTIVITIES SHOULD BE ADJUSTED WHERE POSSIBLE, RATHER THANCONTINUING TO IMPLEMENT FORMERLY ESTABLISHED PRACTICES.SEE PROJECT CONSTRUCTION SWPPP FOR ADDITIONAL INFORMATION OR SECTION 2.2.1.4 OF CHAPTER2 OF VOLUME 6 OF THE 2016 CITY OF TACOMA SURFACE WATER MANAGEMENT MANUALCALL 811 AT LEAST 48HOURS BEFORE YOU DIGVERIFICATION NOTEALL EXISTING UTILITIES IN THE CONSTRUCTION AREA SHALL BEIDENTIFIED AND VERIFIED FOR DEPTH AND LOCATION PRIOR TO ANYCONSTRUCTION ACTIVITIES SO TO IDENTIFY ANY POTENTIAL CONFLICTSWITH PROPOSED CONSTRUCTION. CONTACT PROJECT ENGINEERIMMEDIATELY IF ANY CONFLICTS ARE IDENTIFIED.PRIOR TO ANY CONSTRUCTION ACTIVITIES, VERIFY EXISTINGTOPOGRAPHY IS CONSISTENT WITH WHAT IS SHOWN ON PLANS AND IFTHERE ARE ANY POTENTIAL CONFLICTS WITH PROPOSED CONSTRUCTIONACTIVITIES. CONTACT PROJECT ENGINEER IMMEDIATELY IF ANYCONFLICTS ARE IDENTIFIED.APPROVEDPERMIT NO. XX-XXXXXX-XXDATENOTE:THIS APPROVAL IS VOID 1 (ONE) YEAR AFTERAPPROVAL DATE. THE CITY WILL NOT BE RESPONSIBLEFOR ERRORS AND/OR OMISSIONS ON THESE PLANS.FIELD CONDITIONS MAY DICTATE CHANGES TO THESEPLANS AS DETERMINED BY THE CITY ENGINEER.DESCRIPTIONREVISION DATE BY
CONTACT:
SHEET TITLE:
CLIENT:REV.WMRTSDESIGNER:ENGINEER:DRAWN:DATE:REVISED:PROJECT:DWG NAME:SHEETOFPhone: 253-857-5454 ~ Fax: 253-509-0044 ~ info@contourpllc.com
Mailing Address: P.O. Box 949, Gig Harbor, WA 98335
Physical Address: 4706 97th Street NW, Suite 100, Gig Harbor, WA 98332
CIVIL ENGINEERS ~ SURVEYORS ~ LAND PLANNERS
DANIEL YU (ASSA 2, INC.)
1420 348TH ST.
FEDERAL WAY, 98003
DANIEL YU PHONE:(206) 909-3788 ASSA 2 RETAIL BUILDINGA PORTION OF THE NE 1/4 OF THE SE 1/4 OF SECTION 20, TOWNSHIP 21 N, RANGE 4 E, W.M.,FEDERAL WAY, WASHINGTONJ. BARRB. ALLENJ. BARR2021 N04 E06.29.202323-01523-015-SITE DEV706.29.20234C4
NEW BUILDINGFF=275.501C71C71C7SOUTH 348TH STREETEXISTINGBUILDINGSDCORIM = 275.30IE = 272.09SDCORIM = 275.50IE = 272.15SDCORIM = 275.30IE = 273.8090 LF 6" ADS N-12 @1.0%15 LF 6" ADS N-12 @ 1.0%SDCORIM = 275.45IE = 272.0024 LF 6" ADS N-12 @ 1.0%SDCORIM = 275.35IE = 271.7633 LF 6" ADS N-12 @ 1.0%EXIST. SDCB TYPE-2LADDER WRIM 274.716" PVC IE N 271.3212" ADS IE SW 269.9436" CMP IE SE 268.68NEW WATER METERS, SERVICE LINES AND FIRELINE SHOWN FOR REFERENCE. SEE LAKEHAVENUTILITY DISTRICT IMPROVEMENT PLANSRISER ROOMSDCORIM = 275.30IE = 273.0573 LF 6" ADS N-12 @1.0%EXIST. SSMHLADDER NWRIM = 275.166" PVC IE NE = 267.366" PVC IE SE = 267.336" PVC IE SW = 267.31(PER SURVEY)SSCORIM = 275.00IE = 270.00EXISTING 6" SS SERVICE, LENGTH ANDDEPTH UNKNOWN, CONTRACTOR IS TOVERIFY PER VERIFICATION NOTEGRADING & DRAINAGE PLAN 1 INCH = 20 FEET (22"x34")GRAPHIC SCALE402001 INCH = 40 FEET (11"x17")DESCRIPTIONREVISION DATE BY
CONTACT:
SHEET TITLE:
CLIENT:REV.WMRTSDESIGNER:ENGINEER:DRAWN:DATE:REVISED:PROJECT:DWG NAME:SHEETOFPhone: 253-857-5454 ~ Fax: 253-509-0044 ~ info@contourpllc.com
Mailing Address: P.O. Box 949, Gig Harbor, WA 98335
Physical Address: 4706 97th Street NW, Suite 100, Gig Harbor, WA 98332
CIVIL ENGINEERS ~ SURVEYORS ~ LAND PLANNERS
DANIEL YU (ASSA 2, INC.)
1420 348TH ST.
FEDERAL WAY, 98003
DANIEL YU PHONE:(206) 909-3788 ASSA 2 RETAIL BUILDINGA PORTION OF THE NE 1/4 OF THE SE 1/4 OF SECTION 20, TOWNSHIP 21 N, RANGE 4 E, W.M.,FEDERAL WAY, WASHINGTONJ. BARRB. ALLENJ. BARR2021 N04 E06.29.202323-01523-015-SITE DEV706.29.2023CALL 811 AT LEAST 48HOURS BEFORE YOU DIGVERIFICATION NOTEALL EXISTING UTILITIES IN THE CONSTRUCTION AREA SHALL BEIDENTIFIED AND VERIFIED FOR DEPTH AND LOCATION PRIOR TO ANYCONSTRUCTION ACTIVITIES SO TO IDENTIFY ANY POTENTIAL CONFLICTSWITH PROPOSED CONSTRUCTION. CONTACT PROJECT ENGINEERIMMEDIATELY IF ANY CONFLICTS ARE IDENTIFIED.PRIOR TO ANY CONSTRUCTION ACTIVITIES, VERIFY EXISTINGTOPOGRAPHY IS CONSISTENT WITH WHAT IS SHOWN ON PLANS AND IFTHERE ARE ANY POTENTIAL CONFLICTS WITH PROPOSED CONSTRUCTIONACTIVITIES. CONTACT PROJECT ENGINEER IMMEDIATELY IF ANYCONFLICTS ARE IDENTIFIED.APPROVEDPERMIT NO. XX-XXXXXX-XXDATENOTE:THIS APPROVAL IS VOID 1 (ONE) YEAR AFTERAPPROVAL DATE. THE CITY WILL NOT BE RESPONSIBLEFOR ERRORS AND/OR OMISSIONS ON THESE PLANS.FIELD CONDITIONS MAY DICTATE CHANGES TO THESEPLANS AS DETERMINED BY THE CITY ENGINEER.5C5ROOF/YARD DRAINAGE NOTES1.CONTRACTOR SHALL REFER TO ARCHITECTURAL PLANS FOR EXACTLOCATIONS OF DOWNSPOUTS. DOWNSPOUTS SHALL TIE IN AT EITHER AROOF DRAIN CLEAN OUT OR YARD DRAIN AS SPECIFIED ON THE PLANS.2.ALL ROOF/YARD DRAIN PIPE SHALL BE A MINIMUM 6" HAVING AMINIMUM SLOPE OF 1.0% UNLESS OTHERWISE SPECIFIED ON PLANS.3.PIPE SHALL HAVE A MINIMUM COVER OF 1.0' IN NON-TRAFFIC BEARINGAREAS AND 2.0' IN TRAFFIC BEARING AREAS UNLESS OTHERWISESPECIFIED ON PLANS.4.PIPE SHALL BE ADS N-12 OR APPROVED EQUIVALENT UNLESS COVER ISLESS THAN 2.0' IN TRAFFIC BEARING AREAS. IN THIS CASE, DUCTILEIRON PIPE OR APPROVED EQUIVALENT SHALL BE USED.5.YARD DRAINS SHALL BE ADDED AS NEEDED TO ENSURE THAT NOSTANDING WATER IS ALLOWED. POSITIVE DRAINAGE SHALL BE PROVIDEDIN LANDSCAPED AREAS TO PROVIDED YARD DRAINS.6.ALL SDCO'S AND COVERS LOCATED IN TRAFFIC AREAS SHALL BE TRAFFICBEARING.SEE DETAIL GRADING #1ON SHEET C6SEE DETAIL GRADING #2ON SHEET C6UTILITY NOTESEWER AND WATER UTILITY SERVICES FOR THE PROPOSED BUILDINGARE PROVIDED BY LAKEHAVEN UTILITY DISTRICT WITH THE ORIGINALDEVELOPMENT OF THE PARCEL. SERVICE LOCATIONS CONNECTIONLOCATIONS WERE NOT AVAILABLE AT THE TIME THE SURVEY WASPERFORMED. CONTRACTOR IS TO COORDINATE WITH LUD FOR SERVICELOCATIONS AND COORDINATE WITH THE PLUMBING DESIGNER FORTHE BUILDING CONNECTIONS.
275.07 TC274.57 BC275.21 TC274.71 BC275.17 TC274.67 BCNEW BUILDINGFF = 275.50275.17 TC274.97 BC275.451.0%275.45275.45275.45275.352.0%275.17 TC274.93 BC275.35275.38 TC274.88 BC275.352.0%
2.0%275.35PRESERVE EXISTING EXTRUDED CURB IF POSSIBLE,NEW INTEGRAL CURB AND SIDEWALK IS TO BECONSTRUCTED IF REQUIRED TO MEET SIDEWALKELEVATIONS AT BACK OF CURB AS SHOWN.275.38275.17275.352.0%2C7275.22 TC274.72 BC275.42 TC274.92 BC275.48 TC274.98 BCNEW BUILDINGFF = 275.50275.50275.18 TC274.68 BC275.32 TC274.82 BC3.1%275.503.6%275.22275.18275.500.9%275.43 TC274.93 BC275.50275.431.6%PRESERVE EXISTING EXTRUDED CURB.DETAIL GRADING DESCRIPTIONREVISION DATE BY
CONTACT:
SHEET TITLE:
CLIENT:REV.WMRTSDESIGNER:ENGINEER:DRAWN:DATE:REVISED:PROJECT:DWG NAME:SHEETOFPhone: 253-857-5454 ~ Fax: 253-509-0044 ~ info@contourpllc.com
Mailing Address: P.O. Box 949, Gig Harbor, WA 98335
Physical Address: 4706 97th Street NW, Suite 100, Gig Harbor, WA 98332
CIVIL ENGINEERS ~ SURVEYORS ~ LAND PLANNERS
DANIEL YU (ASSA 2, INC.)
1420 348TH ST.
FEDERAL WAY, 98003
DANIEL YU PHONE:(206) 909-3788 ASSA 2 RETAIL BUILDINGA PORTION OF THE NE 1/4 OF THE SE 1/4 OF SECTION 20, TOWNSHIP 21 N, RANGE 4 E, W.M.,FEDERAL WAY, WASHINGTONJ. BARRB. ALLENJ. BARR2021 N04 E06.29.202323-01523-015-SITE DEV706.29.2023CALL 811 AT LEAST 48HOURS BEFORE YOU DIGVERIFICATION NOTEALL EXISTING UTILITIES IN THE CONSTRUCTION AREA SHALL BEIDENTIFIED AND VERIFIED FOR DEPTH AND LOCATION PRIOR TO ANYCONSTRUCTION ACTIVITIES SO TO IDENTIFY ANY POTENTIAL CONFLICTSWITH PROPOSED CONSTRUCTION. CONTACT PROJECT ENGINEERIMMEDIATELY IF ANY CONFLICTS ARE IDENTIFIED.PRIOR TO ANY CONSTRUCTION ACTIVITIES, VERIFY EXISTINGTOPOGRAPHY IS CONSISTENT WITH WHAT IS SHOWN ON PLANS AND IFTHERE ARE ANY POTENTIAL CONFLICTS WITH PROPOSED CONSTRUCTIONACTIVITIES. CONTACT PROJECT ENGINEER IMMEDIATELY IF ANYCONFLICTS ARE IDENTIFIED.APPROVEDPERMIT NO. XX-XXXXXX-XXDATENOTE:THIS APPROVAL IS VOID 1 (ONE) YEAR AFTERAPPROVAL DATE. THE CITY WILL NOT BE RESPONSIBLEFOR ERRORS AND/OR OMISSIONS ON THESE PLANS.FIELD CONDITIONS MAY DICTATE CHANGES TO THESEPLANS AS DETERMINED BY THE CITY ENGINEER.6C611" = 5'DETAIL GRADING #121" = 5'DETAIL GRADING #21 INCH = 5 FEET (22"x34")GRAPHIC SCALE10501 INCH = 10 FEET (11"x17")
NOTES AND DETAILS DESCRIPTIONREVISION DATE BY
CONTACT:
SHEET TITLE:
CLIENT:REV.WMRTSDESIGNER:ENGINEER:DRAWN:DATE:REVISED:PROJECT:DWG NAME:SHEETOFPhone: 253-857-5454 ~ Fax: 253-509-0044 ~ info@contourpllc.com
Mailing Address: P.O. Box 949, Gig Harbor, WA 98335
Physical Address: 4706 97th Street NW, Suite 100, Gig Harbor, WA 98332
CIVIL ENGINEERS ~ SURVEYORS ~ LAND PLANNERS
DANIEL YU (ASSA 2, INC.)
1420 348TH ST.
FEDERAL WAY, 98003
DANIEL YU PHONE:(206) 909-3788 ASSA 2 RETAIL BUILDINGA PORTION OF THE NE 1/4 OF THE SE 1/4 OF SECTION 20, TOWNSHIP 21 N, RANGE 4 E, W.M.,FEDERAL WAY, WASHINGTONJ. BARRB. ALLENJ. BARR2021 N04 E06.29.202323-01523-015-SITE DEV706.29.2023APPROVEDPERMIT NO. XX-XXXXXX-XXDATENOTE:THIS APPROVAL IS VOID 1 (ONE) YEAR AFTERAPPROVAL DATE. THE CITY WILL NOT BE RESPONSIBLEFOR ERRORS AND/OR OMISSIONS ON THESE PLANS.FIELD CONDITIONS MAY DICTATE CHANGES TO THESEPLANS AS DETERMINED BY THE CITY ENGINEER.7C72NOT TO SCALECURB DETAILS3NOT TO SCALESIDEWALK SECTIONNOTES1.ALTERNATIVE COVER SYSTEMMAY BE SUBMITTED FORAPPROVAL BY OWNER/ENGINEER.2.PIPE MATERIAL AS SPECIFIED BYENGINEER.3.PIPE DIAMETER AS SHOWN PERPLAN.1NOT TO SCALEROOF DRAIN CLEANOUT (SDCO)