2010-04-07 HEX# 10-002 Exhibit GDETERMINATION OF NON -SIGNIFICANCE
Description of Proposal:
The project will improve safety and traffic circulation (which will reduce congestion) for freight
and people in the vicinity of the 1-5-SR 18/SR 161 interchangg In Federal Way. The
improvements would occur- primarily at the Interchange, along I-!�, amid add two new access
ramps to SA 161-at S. 356" St. and S. 35,9' St.
Two loop ramps in the interchange would be reconstructed to provide direct access from SR 18
to 1-5. Widening of 1-5 in both directions to construct auxiliary lanes will provide more storage
for vehicles entering and exiting the freeway. Seven new bridges will be constructed.
Two new exit ramps would pride access to SR 161 in Federal.Way, one at S. 356`h St. and
one at S. 3590' St.
Existing drainage features will be enlarged and new ponds will be constructed. Some culverts
will be extended, some removed (daylighting a branch of Hylebos Creek) and several new
culverts will be installed.
Proponent: Washington State Department of Transportation
Location of Proposal, Including street address, If any:
The project is located within Sections 20, 21,28 and 29 of T 21 N, R 4 E in Federal Way. The
general vicinity Is the Interchange of Interstate 5 with State Route 18.
Lead Agency: Washington State Department of Transportation
The lead agency for this project has determined that It does not have a probable significant
adverse impact on the environment. An Environmental Impact Statement (EIS) is not required
under RCW 43.21 C.030 (2)(c). This decision was made after a review of a completed
environmental checklist and other information on file with the lead agency. This information is
available to the public on request.
This DNS is issued under WAC 197-11-340(2); the lead agency will not act on this proposal for
14 days from the date of signature by the responsible official. Comments must be submitted by
May 29, 2007. Comments may be sent to Ben Brown at the address below.
Responsible O flfcig. aartin Palmer
PositioMltle: Environmental Program Manager ,�
Phone: ( )206 440-4548 R E C E I V E D
Address: WSDOT, NW Region MS 138 DEC 0 ? Z009
PO Box 330310
Seattle, WA 98133-9710 CITY OF FEDERAL WAY
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ENVIRONMENTAL CHECIMIST
The State Environmental Policy Act (SEPA), Chapter 43.21C requires all governmental agencies to
consider the environmental impacts of a proposal before snaking decisions. The purpose of this
checklist is to provide the information to help you and the agency identify impacts for your proposal
(and to reduce or avoid impacts from the proposal, if it can be done) and to help the agency decide
whether an Environmental Impact Statement is required. The checklist questions apply to all parts of
the proposal, even if they are planned over a period of time. Attach any additional information that will
help describe the proposal or its environmental effects. Be prepared to explain answers or provide
additional information reasonably related to determining if there may be significant adverse impacts.
A. BACKGROUND
1. Name of proposed project, if applicable:
I-5-SR 161/SR 18 Triangle Improvements
2. Name of proponent:
Washington State 'Department of Transportation (WSDOT)
3. Address and phone number of proponent and contact person:
Benjamin Brown, MS 138
Washington State Department of Transportation
15700 Dayton Avenue North
P. C. Box 330310 Seattle, WA 98133-9710
Contact person: Christina Olson Phone: (206) 440-4524
4. Date checklist prepared: May 10, 2007
5. Agency requesting checklist:
Washington State Department of Transportation -
6. Proposed timing or schedule (include phasing, if applicable):
Project construction of the first phase would begin in the spring of 2010 and be complete
in the first quarter of 2013. The project will likely be constructed in phases as funding
becomes available. The details of the phased construction have not been finalized.
7. Are there any plans for future additions, expansions, or further activity related to or connected
with this proposal? If yes, explain.
No additions or expansions are planned at this time.
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S. List any environmental information you know about that has been, or will be prepared, directly
related to this proposal.
Discipline studies were completed to analyze effects to the natural and human
environment. They were finalized in November, 2006.
Traffic and Transportation Analysis
Air Quality Analysis
Noise Analysis
Geotechnical Analysis
Fish, Vegetation and Wildlife Report
Critical Areas Analysis
Visual Quality Analysis
Socioeconoinics Analysis
Environmental Justice Analysis
Land Use Analysis
Hazardous Materials Report
Cultural and Historical Resources Report
Water Resources Analysis
Public Parks Report
Wetland Report
Biological Assessment (July 2006)
Future plans include:
Hydraulic Report
Stormwater Site Plan with Temporary Erosion and Sediment Control plan
Spill Prevention, Control and Countermeasures Plan (by Contractor)
Wetland Mitigation Report
Stream Mitigation Report
9. Do you know whether applications are pending for governmental approvals of other proposals
directly affecting the property covered by the proposal? If yes, explain.
There are no known applications for government approvals for other proposals.
10. List any government approvals or permits that will be needed for the proposal, if known.
Sec. 404 Permit (Nationwide) from U.S. Army, Corps of Engineers
Hydraulic Project Approval (HPA) of Fish and Wildlife
National Pollution Discharge Elimination System (NPDES) Baseline General Permit for
Construction from Department of Ecology
Noise Variance from city of Federal Way if night work is required
Section 401 WQ/CZM Letter of Verification from Department of Ecology
Clearing Permit in Sensitive Areas from city of Federal Way
11. Give brief, complete description of the project including (but not limited to) its size, general
design elements, and other factors that will give an accurate understanding of its scope and
nature. There are several questions in this checklist that ask you to describe certain aspects of
the proposal. You do not need to repeat those answers on this page.
The project will improve safety and traffic circulation (which will reduce congestion) for
freight and people in the vicinity of the 1-5-SR 18/SR 161 interchange in Federal Way.
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The improvements would occur primarily at the interchange, along 1-5, and two new
access ramps to SR 161 at S. 356 St. and S. 359 St.
The existing 1-5/SR 18 interchange is a full cloverleaf design Reconstruction would
eliminate the northwest and southeast loop ramps with new direct access ramps providing
movements from eastbound SR 18 to northbound 1-5 and westbound SR 18 to southbound
Improvements to I-5 include widening both northbound and southbound roadways to
construct auxiliary lanes that will provide more storage for vehicles entering and e7dting
the freeway.
The project will provide a new southbound exit off I-5 that would provide direct
connection westbound to SR 161 in the vicinity of S. 3560' St. and southbound to SR 161
near S. 359"' St.
Seven new bridges would be built for the project, five would be in the immediate area of
the interchange, one would be at the SR 18/Weyerhaeuser Way interchange, and the other
would replace. the existing SR 161 overcrossing of I.S.
Because of the changes in the road network, drainage features will be revised. Existing
detention and water quality treatment ponds will be enlarged and additional ponds
constructed. Ecology embankments and a new vault would also provide stormwater
detention and treatment Some existing culverts would be extended, some would be
removed (daylighting the stream) and new culverts would be installed.
Loop ramps replaced by direct access ramps would be regraded and planted.
12. Location of the proposal. Give sufficient information for a person to understand the precise
location of the proposed project, including a street address, if any, and section, township and
range, if known. If the proposal would occur over a range of area, provide the range boundaries
of the site(s). Provide a legal description, site plan, vicinity map, and topographic map, if
reasonably available.
The project is located within Sections 20, 21, 28, and. 29 of T 21 N, R 4 E in Federal Way,
King County.
The general vicinity is the interchange of interstate 5 with State Route 18.
(maps attached)
B. ENVIRONMENTAL ELEMENTS
Earth
a. General description of the site: (flat,, rolling hills, steep slopes, mountainous, other).
The project site is generally flat and trends slightly downward to the southwest.
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b. What is the steepest slope on the site (approximate percent of slope)?
Roadway embankment slopes are up to 50%. Undeveloped slopes within the project limits
are typically less than 10 %.
Generally there is less than 200 feet of relief in the general area of the project.
C. What general types of soils are found on the site (e.g., clay, sand, gravel, peat, muck)? If you
know the classification of agricultural soils, specify them and note any prime farmland.
Typical native soils in the project area are dense to very dense natural glacial soils
including glacial till (silty gravelly sand to silty, sandy gravel), advance outwash sand and
gravel (slightly gravelly, slightly silty to silty sand and silty gravel).
The highways were constructed on fill at some locations. This fill is loose to dense gravelly
silty sand to sandy gravels. Fill thickness ranges from one to 30 feet.
No prime farmland exists in the project's immediate vicinity.
d. Are there any indications of a history of unstable soils in the immediate vicinity? If so, describe.
There are no indications of a history of slope instability in the project area. Natural slopes
are low grades. Constructed slopes of the highways have been engineered to prevent
instability.
C. Describe the purpose, type, and approximate quantities of any filling or grading proposed.
Indicate source of fill.
The source of fill would be from a state approved source, likely a commercial gravel pit.
f. Could erosion occur as a result of clearing, construction, or land use? H so, generally describe.
The disturbance of existing ground cover and placing and grading of earth materials could
result in wind and water erosion of soils.
g. Abogt what percent of the site would be covered with impervious surfaces after project
construction (e.g., asphalt.. buildings)? -
The project would increase the percentage of impervious surface within the project limits
from 37% to 43%. The new impervious surfaces would be asphalt and concrete roadways.
h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any:
The contractor will be required to adhere to a Temporary Erosion and Sediment Control
(TESC) Plan developed by WSDOT. Best Management Practices as described in the
Highway Runoff Manual will be applied to this project. Permanent erosion control
measures will include mulching, planting and seeding for soil cover.
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2. Air
a. What types of emissions to the air would result from the proposal (e.g., dust, automobile, odors,
industrial, wood smoke) during construction and when the project is completed? If any,
generally describe and give approximate quantities, if known.
Construction activities may result in a temporary increase of exhaust fumes and dust
particles from the use of heavy equipment to clear and grade the project site along with
other construction activities. These emission levels will return to pre -construction levels
upon completion of the project. Quantities are unknown.
b. Are there any off -site sources of emissions or odor that may affect your proposal? If so-,
generally describe.
There are no off site sources of emissions that may affect the proposal.
C. Proposed measures to reduce or control emissions or other impacts to the air, if any:
The contractor will be required to adhere to all applicable federal, state, and local air
quality regulations. These regulations cover temporary construction conditions such as
dust, smoke and emissions.
3. Water
a. Surface
1) Is there any surface water body on, or in, the immmediate 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 fiver it flows into.
The project will occur in the immediate vicinity'of wetlands and two streams which are
unnamed tributaries of East Hylebos Creek (WRJA 10). The tributary on the west side of
I-5 is known as 0016A and is an intermittent stream, while the one on the east side, also
intermittent, is known as 0016.
The tributaries' waters drain #o East Hylebos Creek, -which -flows via the Hylebos
Waterway into Commencement Bay of Puget Sound.
2) Will the project require work over, in, or adjacent to (within 200 feet) the described waters? If
yes, please describe and attach available plans.
Yes. The project will require work over, in and adjacent to wetlands and two streams.
The work is necessary for roadway widening, construction of new ramps and the
construction of water duality detention ponds and other features to convey and treat
stormwater runoff.
(Air photos attached)
Approximately 420 feet of existing stream channel would be culverted to accommodate the
new freeway ramps, new stormwater detention ponds and the new direct access ramp
from westbound SR 18 to southbound I-5 and SR 161 along S. 35e St
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3) Estimate the amount of fill and dredge material that would be placed in. or removed from surface
waters or wetlands and indicate the area of the site that would affected. Indicate the source of
fill material.
One wetland (Class 11) will be impacted by the placement of 0.1 acres of fill for the
construction of a new ramp from westbound SR 18 to southbound 1-5. The fill would
come from a state approved contractor provided source, typically a commercial gravel pit.
4) Will the proposal require surface water withdrawals or diversions? Give general description,
purpose and approximate quantities, if known.
Water diversions will be necessary during the construction of proposed bridge columns
and foundations. The diversions will consist of a temporary dam upstream of the channel
construction work. Water will be collected behind the dam, diverted into a temporary
pipe that passes through the construction zone, then discharged back into the channel
downstream of the construction activities. The bypass system will be designed to
accommodate a maximum anticipated flow rate of 10 cfs.
5) Does the proposal lie within a 100-year floodplain? If so, note location on the site plan.
This project does not lie 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.
No waste materials will be discharged to surface water.
b. Ground
1) Will ground water be withdrawn, or will water be discharged to groundwater? Give general
description, purpose and approximate quantities, if known.
No ground water will be withdrawn and no water will be discharged`to groin- dwater.
2) Describe waste material that will be discharged into the ground from septic tanks or other
sources, if any (e.g., 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 served (if he
or the number of animals or humans the system(s) are
expected to serve.
No waste material will be discharged into the ground.
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C. Water Runoff (including storm water)
1} Describe the source of runoff (including storm water) 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.
The only source of runoff is stormwater from the roadways and bridges.
This runoff will be detained and treated in a combined wetldetention ponds and treated in
ecology embankments where feasible. In some locations the runoff will be captured and
conveyed via underground closed drainage systems. Water will be detained in
underground vaults near the intersection of SR 161 and S 35e St. and SR 161 and S.
348th St.
Stormwater will be treated for quality and quantity according to the 2006 WSDOT
Highway Runoff Manual, and then allowed to flow into the existing waterways and
receiving bodies.
2) Could waste material enter ground or surface water? If so, generally describe.
In the event of a spill, petroleum products from equipment used during construction or
fuel spilled at an accident site could conceivably enter ground or surface water.
d. Proposed measures to reduce or control surface, ground and runoff water impacts, if any:
During construction the contractor will be required to complyou Swith an approved
a Plan
Temporary Erosion and Sediment Control (TESL) plan, part
designed in accordance with the 2006 WSDOT Highway Runoff Manual and approved by
WSDOT. As permanent measures, stormwater will be collected in a combination of
ditches, ponds, vaults and an enclosed drainage system. It will be treated for quality and
quantity according to the Highway Runoff Manual, and then allo, ved to flow into the
existing waterways and receiving bodies.
The contractor will also be required to follow an approved Spill Prevention plan for
potential haaairdovs material spills. -
4. Plants
a. Types of vegetation found on the site.
1 Typical roadside vegetation includes native second and third growth mixed deciduous (red
alder, cottonwood, Oregon ash, vine maple) and coniferous (Douglas fir, western hemlock,
j western red cedar) trees, shrubs (including Himalayan blackberry and Scots broom) and
grasses (dominated by reed canary grass) as well as ornamental vegetation associated with
residences.
Vegetation found along the streams includes second growth coniferous and deciduous
trees (Douglas fir, western red cedar Oregon ash, red alder, black cottonwood), shrubs
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(Douglas spirea, salmonberry and willow) and ferns, slough sedge, reed canary grass,
creeping buttercup and water parsley.
What kind and amount of vegetation will be removed or altered?
Approximately 103 acres of vegetation would be disturbed to construct the project (this
includes permanent and temporary disturbance).
13 acres of developed or previously cleared land.
44 acres of mixed deciduous forest
39 acres of maintained highway right of way
2 acres of riparian areas
3 acres associated with wetland areas (mostly buffer)
2 acres of meadow/grassland
List threatened or endangered species known to be on or near the site.
There are no threatened or endangered plant species known to be in the project area.
Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation
on the site, if any:
A Roadside Restoration Plan will be developed to direct the replanting of disturbed areas
associated with the project. All disturbed areas will be seeded. Riparian areas disturbed
daring construction would be replanted with appropriate native plants to contribute
biomass to the stream system The margins of the detention ponds would also be planted
with native plants or grasses.
Animals
Birds or animals that have been observed on or near the site or are known to be on or near the
site.
Birds: generalist bird species, great blue heron, bald eagle
Animals: small mammals --(opossums; raccoons rodents); reptiles; insects
List any threatened or endangered species known to be on or near the site.
Bald Eagle (threatened)
Is the site part of a migration route? If so, explain.
This site is not part of a migration route.
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d. Proposed measure to preserve or enhance wildlife, if any:
Water quality treatment for the project will benefit fish and fish habitat downstream
6. Energy and Natural Resources
a. What kinds of energy (electric, natural gas, oil, wood stove or solar) will be used to meet the
completed projects energy needs? Describe whether it will be used for heating, manufacturing,
etc.
Electrical power will be needed for the roadside lighting and traffic signals installed as
features of the project.
b. Would the 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 included in the plans for this proposal.
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.
i
The risk of release of hazardous materials to the environment is always present during
construction. This could include discovery of unknown underground hazardous
substances and spills associated with fuel and other substances associated with
construction activities and vehicles. Traffic accidents could also occur in the area during
construction that could release fuels and other hazardous substances to the environment
or result in vehicle fires. Standard construction methods and traffic control measures will
` be employed to minimize a risk of such incidents.
Release of hazardous materials to the environment once the project has been completed
includes accidents involving spilled fuel or hazardous materials being transported along
the highways. Vehicle fires also could occur.
1) Describe special emergency services that might be required.
No special emergency services will be required. WSDOT incident response teams carry
supplies and are trained to respond to minor releases. They coordinate with the
Department of Ecology and Washington State Patrol for larger spills and accidents
involving hazardous materials.
2) Proposed measures to reduce or control environmental health hazards, if any:
Standard construction practices, safety measures, and traffic control measures will
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be required of the contractor. Discovered potentially hazardous waste will be handled
in accordance with Environmental Protection Agency, Department of Ecology, and local
health regulations. ,
A spill control plan will be required from the Contractor and will be reviewed and
approved by WSDOT. The. spill control plan will be kept on site at all times and
designates spill control measures to be undertaken. A spill control kit will also be on site
at all times.
WSDOT incidence response teams may be available to respond to accident sites and they
have spill clean-up kits for small spills of hazardous materials.
b. Noise
1) What types of noise exist in the area which may affect your project (e.g., traffic, equipment,
operation, other).
The predominant cause of noise is truck and automobile traffic using 1-5, SR 18 and SR
161. These noise sources will not adversely 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 (e.g., traffic, construction, operation, other)? indicate what hours noise
would come from the site.
During construction, noise levels may temporarily increase due to construction equipment
and activities. This will include pile driving for bridges. Noise will be intermittent and
temporary. Typical daytime work hours are Gam to 6pnL Night work may be required.
Noise levels will increase over the existing condition during the 20-year operation of the
project. The noise from the vehicles traveling the highways would be continuous, but most
prominent from 6.00 am until 10:00 pm. Two noise walls, which meet WSDOT's feasibility
and reasonableness criteria, are recommended to mitigate the effects from traffic noise to
adjacent residences. One wall is located along the west side of I-5 extending 742 feet south
of the SR 161 overcrossing of the freeway. The second wall is located along the east side of
1-5 from the SR 1.61 overcrossing northwards for 1,831 feet.
3) Proposed measures to reduce or control noise impacts, if any:
During construction, the contractor will be required to adhere to all applicable federal,
sate, and local noise regulations governing source noises resulting from construction site
activities for the duration of the contract. If night work is required, a noise variance will
be obtained from the city of Federal Way, and the permit conditions will be followed.
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8. Land and Shoreline Use
a. What is the current use of the site and adjacent properties?
The project site is used for vehicular transportation. The project area is within WSDOT
right of way. Adjacent properties include residential, commercial, and bossiness park uses.
b. Has the site been used for agriculture? If so, describe.
This site has not been used for agriculture.
C. Describe any structures on the site.
Structures include highway bridges and two homes.
d. Will any structure be demolished? If so, what?
The project will remove and reconstruct the SR 161 bridge which passes over I-5. Four
residences will be demolished to construct a new westbound direct access to SR 161 from
westbound SR 18 and southbound I-5...
e. What is the current zoning classification of the site?
The interchange area is state right -of way within the city of Federal Way in Sing County
and is not subject to zoning. The land where the new westbound and southbound accesses
to SR 161 would be built is zoned community business although residences occupy some of
the properties.
f. What is the current comprehensive plan_ designation of the site?
The WSDOT right of way is not included in the Federal Way comprehensive plan. The
parcels adjacent to the new westbound access to SR 161 along S. 356h St. and southbound
access at S. 3Wh St. are designated as "Community Business".
g. If applicable, what is the current shoreline master program designation of the site?
This project is ndt in a designated shoreline area:
h. Has any part of the site been classified as an "environmentally sensitive" area? If so, specify.
There are wetlands and streams within the project site.
i. Approximately how many people would reside or work in the completed project?
No people will reside or work in the completed project (state highways)
j. Approximately how many people would the completed project displace?
Five properties would be acquired in total with 2 residents displaced.
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Proposed measures to avoid or reduce displacement impacts, if any:
The project was designed to reconfigure the interchange as much as possible within the
existing highway right of way. The displacement of two residents is associated with the
new direct access from 1-5 and SR 18 to SR 161 along S. 356th St. All relocations of
residents will be completed in accordance with the Uniform Relocation Act.
Proposed measures to ensure the proposal is compatible with existing and projected land uses
and plans, if any:
The project is compatible with existing land use plans for the area.
Housing
Approximately how many units would be provided, if any? Indicate whether high, middle, or
low-income housing.
No housing units will be provided.
Approximately how many units, if any, would be eliminated? Indicate whether high, middle, or
low-income housing.
Two houses would be eliminated for the new direct access ramp to SR 161 along S. 356h
St. They are middle -income housing. One of the houses is being used for business
purposes.
Proposed measures to reduce or control housing impacts, if any:
The project was designed to reconfigure the interchange within the existing WSDOT right
of way as much as possible to avoid impacts to residences and businesses. WSDOT will
assist owners and pay relocation expenses for displaced residents.
10. Aesthetics
a.
b.
What is the tallest Height of any proposed structure(s), not including antennas; what is the
principal exterior building material(s) proposed?
The new highway ramps will be up to 34 feet tall. Concrete and steel girders are the
exterior building materials. The girders will sit on concrete columns.
What views in the immediate vicinity would be altered or obstructed?
Views of the highways would change for drivers. Two loop ramps would be eliminated
and realignments would provide direct access .to areas west of 1-5. Two new elevated
bridges over the mainline of 1-5 would be constructed. These high structures will give
motorists more dramatic territorial views than currently available and will be visible fr6m
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neighborhoods to the south and east of 1-5. Two new access ramps at S. 356a' St. and S.
359St. would be built which add walls and structures visible to freeway users. These are
not in areas of sensitive viewers. All changes in alignments would result in changes to
roadside vegetation, eliminating some views to forested areas. Views toward the freeway
mould change for some residents in the area of two proposed noise walls. The noise walls
would be concrete.
c. Proposed measures to reduce or control aesthetic impacts, if any:
Roadside plantings would be installed and the abandoned loop ramps would be replanted.
The final textural and/or decorative treatment of the noise walls would be determined in
the final design for the project.
11, Light and Glare
a. What types of light or glare will the proposal produce? What time of day would it mainly
occur?
The interchange will include roadway illumination provided by freestanding pole lights.
Lighting is controlled by photocells that turn lights on during house of darkness. Lights
would be placed alongside the mainline of I-5, SR 18, and along the new direct access
ramps to SR 161.
b. Could light or glare from the finished project be a safety hazard or interfere with views?
No. The lighting is designed to enhance safety and will direct light onto the roadway
surfaces. it will not interfere with views.
C. What existing off -site sources of light or glare may affect your proposal?
Off site light sources are not anticipated to affect this proposal.
d. Proposed measures to reduce or control light and glare impacts, if any:
No light and glare impacts are expected.
12. Recreation
a. What designated and informal recreational opportunities are in the immediate vicinity?
No public parks are located adjacent to the project. The private amusement park, Wild
-4 Waves/] Enchanted Village is located southeast of the project. The Weyerhaeuser
Corporation allows use of its open space to the public including two passive recreation
sites at the Rhododendron Species Foundation Botanical Gardens and the Pacific Rijn
Bonsai Collection. Walking and running trails on the property are also open to the public.
j Beyond the project area there are numerous Federal Way parks and open space sites.
b. Would the proposed project displace any existing recreational uses? If so, describe.
The proposed project will not displace any existing recreational uses.
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C. Proposed measures to reduce or control impacts on recreation, including recreation opportunities
to be provided by the project, if any:
Because no impacts occur, no mitigating measures are required.
13. Historic and Cultural Preservation
a. Are there any places on 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.
A cultural resources study and archeological study has been done for the project site and
there are no places or objects listed or eligible for listing on the any preservation registers.
b. Generally describe any landmarks or evidence of historic, archaeological, scientific, or cultural
importance known to be on or next to the site. If so, generally describe.
None are known.
C. Proposed measures to reduce or control impacts, if any:
In the event that any archeological artifacts are encountered, work will be stopped and
WSDOT will notify the Department of Archeological and EUstoric Preservation (DAHP)
and appropriate tribal authorities. Section 1-07.16(4) of the WSDOT Standard
Specifications which are incorporated Into all contracts by reference includes the protocol
to be used.
14. Transportation
a. Identity public streets and highways serving the site, and describe proposed access to the
existing street system. Show on site plans, if any.
Access to SR 18 in the immediate project area is provided by Weyerhaeuser Way to the
east of I-5 and S. 348a' St and le Ave S. /Enchanted Parkway (SR 161) west of 1-5. AD
streets are in Federal Way. New access to Enr-banted Parkway (SR 161) will be added at S.
35e St. and S. 359 h St
b. Is the site currently served by public transit? If not, what is the approximate distance to the
nearest transit stop?
Public transit services (METRO, Pierce Transit and Sound Transit) use 1-5, SR 18, and SR
161. There are no transit stops along the freeways. Pierce Transit routes use SR 161 with
designated bus stops aIong the road.
C. How many parking spaces would the completed project have? How many would the project
eliminate?
The completed project will provide no parking spaces, nor would it eliminate public
parking spaces in the area.
1-5-SR 161/SR 18 Triangle Improvements 14 WSDOT
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d. Will the proposal requite any new roads or streets, or irnproveUmts to existing roads or streets,
not including driveways? If so, generally describe (indicate whether public or private).
The project is a higliWay improvement project that will reconfigure the existing I.51SR 18
interchange and provide new direct access from these highways to SR 161. AM
improvements are public roads.
e_ Will the project use (or occur in the immediate vicinity of) water, fail, or air transportation? If
so, generally describe.
The completed 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 vole mes would occur.
The project will not generate any additional vehicle trips. Typical.peak volumes include
the morning and evening commute times.
g. Proposed measures to reduce or control transportation impacts, if MY:
The project is intended to enhance safety and improve circulation in the area of the I-S/SR
18 interchange and S. 348tzf St. in Federal Way.
IS. Public Services
a. Would the project result in an increased need for public services (e.g., fire protection, police
protection, health care, schools, other)`( If so, generally describe.
The project would not result in increased need for public services.
b. Proposed measures to reduce or control direct impacts on public services, if any:
Because the project has no direct impacts on public services, no mitigation is necessary.
16. Utilities
a. Utilities currently available at the site: electricity, natural gas, water, refuse service, telephone,
sanitary sewer, septic system, offm-.
Electrical service is present to service highway light and signal systems on the roadways.
Other utilities lie adjacent or cross the project but would be minimally impacted (luring
construction of the roadway improvements.
Natural Gas: Puget Sound Energy underground gas Iines cross 1-5. DLMibusion mains cross
ovv- 15 at 33e St and at Enchanted Parkway/SR 16I. A gas distribution main crosses over SR
18 along Weyerhaeuser• 1 QY-
Fuel: Olympic Gas pipeline is located east of I-5 adjacent to the highway right of way. It is part
of an interstate pipeline system carrying gasoline, diesel sand jet fr.cel.
1-5-SR 1611SR 18 Triangle Improvements 15
WSDOT
i
Electricity: An electrical sublrrvismWion line runs along SR 161 and S. 34? St and S. 356"' St.
A list) ibution substation is located northeast of the 1-51SR 13 interchange.
Water: There are water lines serving businesses and residences ar jacent to WSDOT right of
way
Telephone: Qwest telephone and DSL lines are in the project area as well as two cell phane
towers along S. 35e' St.
Sanitary Sewer: No sewers are located in the 'WSDOT right of way. Properties to be acquired
along S. 356th St. have septic systems.
b. 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 unmediate vicinity which might be needed.
The electric service will be modified to supply additional highway lighting and signals and
water service will be added to supply fire hydrants. The contractor will excavate for the
water line and electrical conduit and then bacltfiR the trenches.
C. SIGNATURE
The above answers and true and correct to the best of my knowledge,
Signature: /11�/-, ? -
B�11jrII1Ti town
Envir n L Documentation Program Manager
XDate y
to
1-5-SR 1611SR 18 Triangle Improvements 16 WSDOT
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