HomeMy WebLinkAboutSEPA EPIC-26-91 - CITY OF TUKWILA / PUBLIC WORKS - INTERURBAN / FOSTORIA STREET WIDENING AND DRAINAGEINTERURBAN / FOSTORIA
ROADWAY WIDENING
& DRAINAGE
IMPROVEMENTS
INTERURBAN AVE. S.,
42ND AVE. S., 52 "D AVE. S.,
S. 133RD ST. & S. 134T" PL.
EPIC -26 -91
•
To: Brian Shelton
From: Moira Carr Bradshaw 00
Date: 16 September 1991
Subject: Interurban Avenue S./ Fostoria Drainage Pipeline,
There are three items of concern regarding Southgate Creek
Mitigation.
1. The contractor's temporary diversion plan will require DCD
approval, prior to the Engineer giving the notice to proceed.
2. The sensitive areas overlay zone requires a 35 foot vegetative
buffer on both sides of the creek. The intent, of the
ordinance is to pursue enhancement therefore the proposed
willow around the storm drain outfall is not sufficient.
Sheet L -1 needs to be revised to show-riparian vegetation from
the retaining wall to the downstream limit of construction
disturbance and extending 35 feet away from the water channel.
3. The following comments regard the proposed evaluation plan
after construction and need a response from you:
a. How often and by whom will regular inspection occur?
b. What function are the weir's designed for and how will you
verify this function?
cc:
c. At what performance standard or quantity level will
sedimentation in the bays be removed?
d. How will scouring, erosion or sedimentation in stream
channel be corrected if noted?
Ron Cameron
Jack Pace
Bob Giberson
Gary Schulz
Mari; c.,,rK-ell 7 f/6 2 e o
To: Brian Shelton
From: Moira Carr Bradshaw a5
Date: 9 September 1991
Subject: Interurban Fostoria Improvements
I read in the paper that a construction contract for the above
project had been awarded by the City.
Attached are copies of the conditions attached to the
approval /permit for the project. I am not aware of a Mitigation
Plan for the removal of the bridge and construction of the arch
culvert, which required DCD approval prior to project
advertisement. In addition please respond as to how you are
addressing the landscape additions in your contract /construction
process.
cc: Jack Pace
MITIGATION MEASURES
EPIC 26 -91 INTERURBAN/FOSTORIA
DRAINAGE AND STREET IMPROVEMENT PLAN
DCD approval prior to project advertisement of a Mitigation Plan which shows:
a. Stream channel dimensions, including depth, width, length and gradient and
its maintenance or improvement.
b. Planting plan for buffer extending 35 feet from ordinary high water mark (to
top of bank, if necessary to encompass all of bank) and length of disturbed
area.
c. Detailed written construction specifications, mitigation techniques, construction
sequence.
d. Evaluation program for assessing completed project's success.
•
INTERURBAN AVENUE SOUTH /FOSTORIA DRAINAGE PIPELINE
Southgate Creek Mitigation Evaluation Program
The proposed improvements will require the tem orary diversion
of Southgate Creek during construction of the pipe arc , weir
structures, and retaining wall proposed at the current stream
location under Interurban Avenue South. The improvements will also
provide a new outfall with channel armouring for a high flow storm
diversion trunkline. The trunkline will reduce the impacts of
localized flooding upstream that occurs after severe storm events and
should reduce degradation of the stream from high flows created from
those same storm events.
Erosion /sedimentation control will be required during
construction to mitigate potential damage to a stream. A planting
plan has been developed to restore the stream bank disturbed by
construction. Detailed construction specifications, mitigation
techniques, and a construction sequence have been developed for the
project.
The project improvements associated with the stream will be
evaluated after construction on the following basis: 1
O. lip1. RegtIlar (inspection ofd weirs to verify the function as �,�Jk,.7a
ill designed. Chec for sedimentation in each bay.
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2 2. Regular / `i ec ion of stream channel for signs of
( f �,0 sedimentation, erosion, or scouring. Note water clarity,
}fh V, high water mark, etc.
i)fie. p\o5 3. Monitor stream channel vegetation to verify plant
1,1/ establishment and rep ace any failed vegetation.
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LEGAL RELATIONS AND RESPONSIBILITIES -TO THE PUBLIC 1 -07
The Contractor shall bear sole responsibility for damage to completed portions of the
project and to property located off the project caused by erosion, siltation, run-off, or
other related items during the construction of the project. The Contractor shall also bear
sole responsibility for any pollution of rivers, streams, ground water, or other waters
which may occur as a result of construction operations.
The Contractor shall exercise all necessary precautions throughout the life of the
project to prevent pollution, erosion, siltation, and damage to property.
'it2e41 -07.15 Temporary Water Pollution /Eroelon Control
This work consists of temporary measures shown in the plans, specified in the
special provisions, proposed by the Contractor and approved by the Engineer, or ordered
by the Engineer as work proceeds. This work is intended to prevent, control, and stop
•water pollution or erosion within the project, thereby protecting the work, nearby land,
streams, and other bodies of water.
Controlling pollution, erosion, run -off, and related damage may require the
Contractor to perform temporary work items including but not limited to:
1. Providing ditches, berms, culverts, and other measures to control surface water,
2. Building dams, settling basins, energy dissipatcrs, and othcr measures, to
control downstream flows,
3. Controlling underground water found during construction, or
4. Covering or otherwise protecting slopes until permanent crosion- control
measures are working.
Before any work begins, the Contractor shall obtain Engineer's approval on
plan for temporary water po lution /erosion control. The plan shall show the schedule for
all crosion - control work, whether permanent as requI is the contract or temporary as
proposed by the Contractor. The plan shall cover all areas the Contractor's work may
affecty insidee and outside the limits of the project (including all Contracting Agency -
provided sources, disposal sites, and haul roads, and all nearby land, streams, and othcr
bodies of watcr). Before this plan has been approved, the Contractor shall do no clearing
and grubbing or earthwork unless the Enginccr approves in writing. The Contractor shall
revise and update the plan whenever the Enginccr so requests in writing.
The Contractor shall allow at least five working days for the Engineer's review of
•any original or revised plan. Failure to approve all or part of any such plan-shall not make
the Contracting Agency liable to the Contractor for any work delays.
To the degree possible, the Contractor shall coordinate this temporary work with
permanent drainage and erosion control work the contract requires.
If the Engineer, under Section 1 -08.6, orders the work suspended for an extended
time, the Contractor shall, before the Contracting Agency assumes maintenance
responsibility, make every effort to control erosion, pollution, and run -off during
shutdown. Section 1 -08.7 describes the Contracting Agency's responsibility in such
cases.
If natural elements rut or erode the slope, the Contractor shall restore and repair the
damage, with the eroded material where possible, and clean up any remaining material in
ditches and culverts. If the Enginccr orders replacement with more or other materials, unit
contract prices will cover the quantities needed.
If the Engineer anticipates water pollution or erosion, the Contractor shall schedule
the work so that grading and permanent erosion control immediately follow clearing and
grubbing. If conditions prevent such scheduling, the Engineer will require temporary
control measures between work stages.
Pn, a 1 -59
1 -07 LEGAL RELATIONS AND RESPONSIBILITIES TO TIIE PUBLIC
The Engineer will not permit the area of excavation, borrow, and embankment work
to exceed the Contractor's ability to meet the schedule for finish grading, mulching,
seeding, and other permanent erosion control work.
Clearing and grubbing, excavation, borrow, or fill within the right of way shall never
expose more than 750,000 square feet of erodible earth, unless the Enginccr approves
otherwise. The Engineer may increase or decrease this 750,000 -square -foot limit in light
of project conditions.
The Engineer may require temporary control measures if it appears pollution or
erosion may result from weather, the nature of the materials, or progress on the work. The
Engineer may also require permanent erosion- control work to be done with or
immediately after grading.
When temporary control devices are no/longer needed, the Contractor shall remove
them and finish the areas they occupied as the Engineer directs.
Nothing in this section shall relieve the Contractor from complying with other
contract requirements.
If done according to the approved, plan or the Engineer's orders, temporary water
pollution/erosion control work will be measured and paid for:
1. At unit contract prices if the work differs little from specified contract work, or
2. By force account, Section 1 -09.6, if not covered by contract items.
For the purpose of providing a common proposal for all bidders, the Contracting
Agency has estimated the cost of "temporary Water Pollution/Erosion Control" and has
entered the amount in the proposal to become a part of the total bid by the Contractor.
The Contractor shall bcar full responsibility for temporary water pollution control in
all sources of material, disposal sites, and haul roads the Contractor provides. All costs
for this work shall be included in the various unit prices for materials obtained from or
hauled to Contractor - provided sites.
Erosion control items named in the contract shall be considered permanent control
measures and paid for at unit contract prices.
1 -07.16 Protection and Restoration of Property
1- 07.16(1) Private/Public Property
The Contractor shall protect private or public property on or in the vicinity of the
work site. The Contractor shall ensure that it is not removed, damaged, destroyed, or
prevented from being used unless the contract so specifies.
Property includes land, utilities, trees, landscaping, improvements legally on the
right -of -way, markers, monuments, buildings, structures, pipe, conduit, sewer or water
lines, signs, and other property of all description whether shown on the plans or not.
If the Engineer requests in writing, or if otherwise necessary, the Contractor shall
install protection, acceptable to the Engineer, for property such as that listed in the
previous paragraph. The Contractor is responsible for locating all property that is subject
to damage by the construction operation.
If the Contractor (or agents /employees of the Contractor) damage, destroy, or
interfere with the use of such property, the Contractor shall restore it to original
condition. The Contractor shall also halt any interference with the property's use. If the
Contractor refuses or dots not respond immediately, the Engineer may have such
property restored by other means and subtract the cost from money that will be or is due
the Contractor.
Pnan 1 -611
•
City of Tukwila
PLANNING DEPARTMENT
6200 Southcenter Boulevard
Tukwila, Washington 98188
(206) 433 -1849
Shoreline Management Act of 197.1
PERMIT FOR SHORELINE MANAGEMENT SUBSTANTIAL DEVELOPMENT
CONDITIONAL USE OR VARIANCE
File Number: 91- 06 -SMP
Approved XXX Denied
Date: July 26, 1991
TYPE OF
ACTION: X X(Substantial Development Permit (J Conditional Use Q Variance
Pursuant to RCW 90.58, a permit is hereby granted to:
City of Tukwila Public Works Department.
to undertake the following development (be specific): Roadway improvements which
include bridge removal, roadway widening, paving, curb & gutter, sidewalks,
retaining walls, trees, shrubs, & ground cover; street lights & intersection
signals; bus stops & shelter; biofiltratjon,swales with un1erground storm drain pipes.
upon the following property (legal description, i.e., section, township, range):
Interurban Avenue, generally from the intersection of 42nd Avenue South to
57th /52nd Avenue South, including 133rd Street from South 134th Place South.
Section 10,10,15,14; Twn 23N; Rge 4E.
THE PROPOSED PROJECT WILL BE WITHIN THE AREA OF THE GREEN RIVER
AND ITS ASSOCIATED WETLANDS, WHICH IS A SHORELINE OF STATEWIDE
SIGNIFICANCE AND IS DESIGNATED AS AN URBAN ENVIRONMENT.
The following master program provisions are applicable to this-development
(state the Master Program sections or page numbers): See Staff Report.
Development pursuant to this permit shall be undertaken
pursuant to the following terms and conditions:
(1) DCD approval of Watercourse Mitigation Plan prior to project advertisement
per file EPIC- 26 -91. (2) Design and construction of raised and landscaped
medians between stations 101 - 103.72 and 105 - 106.30 and S.W. island 42 and
Interurban Intersection. (3) Revised landscape plan to show Kwanzan Cherries
at intersections and then Northern Red Oaks throughout.
STATE OF WASHINGTON
DEPARTMENT OF ECOLOGY
Mail Stop PV -11 • Olympia, Washington 98504 -8711 • (206) 459-6000
July 18, 1991
Mr. Rick Beeler
City of Tukwila
6200 Southcenter Boulevard
Tukwila, WA 98188
Dear Mr. Beeler:
Thank you for the opportunity to comment on the determination of
nonsignificance for bridge removal and road improvements (file #EPIC- 26 -91).
We reviewed the environmental checklist and have the following comments.
1. The applicant proposes to demolish an existing structure(s). Item B.7.a
of the checklist asks if there are any environmental health hazards that could
occur as a result of the proposal. Improper disposal of solid waste,
including demolition waste, can result in environmental health hazards. The
applicant should identify the disposal site for the demolition material. In
addition, the applicant should be encouraged to pursue mitigating activities
such as salvage, reuse, and recycling of the demolition materials.
2. As indicated, a shoreline permit is required for this project. The
,proposed project must be consistent with all applicable policies and other
provisions of the Shoreline Management Act, its rules, and the local shoreline
master program.
If you have any questions on comment 1, please call Mr. Kyle Dorsey of the
Northwest Regional Office at (206) 649 -7132. Questions on comment 2 should be
directed to Ms. Linda Rankin of the Shorelands Program at (206) 459 -6763.
PLC:bjp
91 -4129
cc: Kyle Dorsey, NWRO
Janet Thompson -Lee, NWRO
Linda Rankin, Shorelands
Sincerely,
L WI.�CCc , au,Q1-Jay Patricia L. Crumley
Environmental Review Section
1
fJUL22 1991
0
STATE OF WASHINGTON
DEPARTMENT OF ECOLOGY
Mail Stop PV -11 • Olympia, Washington 98504 -8711 • (206) 459 -6000
July 18, 1991
Mr. Rick Beeler
City of Tukwila
6200 Southcenter Boulevard
Tukwila, WA 98188
Dear Mr. Beeler:
JUL 19.1991
PLANNING DEPT.
.
Thank you for the opportunity to comment on the determination of
nonsignificance for bridge removal and road improvements (file #EPIC- 26 -91).
We reviewed the environmental checklist and have the following comments.
1. The applicant proposes to demolish an existing structure(s). Item B.7.a
of the checklist asks if there are any environmental health hazards that could
occur as a result of the proposal. Improper disposal of solid waste,
including demolition waste, can result in environmental health hazards. The
applicant should identify the disposal site for the demolition material. In
addition, the applicant should be encouraged to pursue mitigating activities
such as salvage, reuse, and recycling of the demolition materials.
2. As indicated, a shoreline permit is required for this project. The
proposed project must be consistent with all applicable policies and other
provisions of the Shoreline Management Act, its rules, and the local shoreline
master program.
3. Based on the information contained in the checklist, and specifically
identification that wet soil plants are preesent on the project site, it
appears that wetlands are present on the project site.
4. Wetlands are a valuable natural resource that provide many useful .
benefits, including wildlife and fisheries habitat, floodwater attenuation,
water quality improvement, and recreational and aesthetic values.
5. If it has not already been done, we recommend that all wetlands on the
site be delineated using the federal wetlands delineation methodology to
determine the extent of wetlands.
6. Wetlands should be preserved with a buffer adequate to protect them from
adjacent land use. Any adverse impacts to wetlands on the site should be
minimized to the fullest extent possible. Any unavoidable impacts to wetlands
should be mitigated by enhancement or creation of additional wetlands.
7. If the project will result in unavoidable wetland impacts, Ecology
recommends preparation of a mitigation plan which includes information on:
the goals and objectives, construction details (including schedule), the
hydrologic regime, revegetation plans, monitoring plan, contingency plans,
buffers, the estimated cost, and bonding. The goal of compensatory mitigation
3
Mr. Rick Beeler
July 18, 1991
Page 2
should be to replace the wetland functions and values that will be destroyed.
In the case of severely degraded wetlands, however, we recommend that improved
quality be an objective.
8. Based upon recent findings, Ecology recommends the following acreage
replacement ratios as guidance in determining minimum acreage replacement for
unavoidable losses:
3.0 : 1 -for forested wetlands,
2.0 : 1 for scrub -shrub wetlands,
1.5 : 1 for emergent marsh
(NOTE: These ratios are recommended for calculating the area of wetlands to
be created. The area should be doubled for enhancement of an existing
wetland.)
These ratios should be viewed as general guidelines that may be adjusted
either upwards or downwards based upon consideration of two factors: 1) the
likelihood of successful replacement of lost wetland functions, and 2) the
time lag between the loss of wetland functions and their replacement.
If you have any questions on comment 1, please call Mr. Kyle Dorsey of the
Northwest Regional Office at (206) 649 -7132. Questions on comment 2 should be
directed to Ms. Linda Rankin of the Shorelands Program at (206) 459 -6763 and
for questions on comments 3 through 8 contact Ms. Ann Remsberg of the Wetlands
Section at (206) 493 -9260.
Sincerely,
0.,
Patricia L. Crumley
Environmental Review Sect '.n
PLC:bjp
91 -4129
cc: Kyle Dorsey, NWRO
Janet Thompson -Lee, NWRO
Linda Rankin, Shorelands
Ann Remsberg, Wetlands
CITY OF TUKWILA
DEPARTMENT OF if MMUNITY DEVELOPMENT
FAX NUMBER: (206) 431 -3665
TO:
DATE:
3 1°161)
TITLE:
FROM:
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COMPANY:
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TITLE:
DEPARTMENT: ,
DEPARTMENT:
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THIS COVER SHEET:
SENT BY
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451-
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DEPARTMENT OF COMMUNITY DEVELOPMENT
6300 Southcenter Boulevard, Tukwila WA 98188
Office: (206) 431-3670
06/15/00
A e t t U A V t l
I, Sylvia A. Osby . •
Q Notice of Public Hearing
0 Notice of Public Meeting
Q Board of Adjustment Agenda Packet
Q Board of Appeals Agenda Packet
Q Planning Commission Agenda Packet
Q Short Subdivision Agenda Packet
[] Notice of Application for
Shoreline Management Permit
Q Shoreline Management Permit
was
OF DISTRIBUTION
hereby declare that •
[] Determination of Nonsignificance
Mitigated Determination of Non.
significance
Q Determination of Significance
and Scoping Notice
Q Notice of Action
0 Official Notice
0 Other
Q Other
to each of the following addresses on
Name of Project Interurban /Fostoria Roadway
and Drainage Improvements
File Number EPIC -26 -91
July 3, 1991
, 19 .
WAC 197 -11 -970
MITIGATED
DETERMINATION OF. NONSIGNIFICANCE
Description of Proposal Design approval to remove bridge; Widen and pave road;
'install curb, gutters, sidewalks, landscaping, light poles, signals, street strom
collection, treatment and discharge; a storm sewer trunk pipeline; and associated
improvements.
Proponent - - -- City of Tukwila Public Works Department.
Location of Proposal, including street address, if any Interurban Avenue from 640 ft.
North of 42nd Avenue South to 52nd Avenue South and South 133rd Street from 450 ft.
West of South 134th Place to Interurban Avenue South.
Lead Agency: City of Tukwila File No. EPIC -26 -91
The lead agency for this proposal 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 43.21C.030(2)(c). This decision was made after
review of a completed environmental checklist and other information on file with the
lead agency. This information is available to the public on request.
[I There is no comment period for this DNS
4x This DNS is issued under 197 -11- 340(2). Comments must be submitted by
July 20, 1991 . The lead agency will not act on this
proposal for 15 days from the date below.
_Responsible Official Rick Beeler
Position /Title Planning. Director
Address 6200 Southcenter Boulevard,
Date ff Signature
Phone 433 -1846
A- 98188
You may appeal this determination to the City Clerk at City Hall, 6200 Southcenter
Boulevard, Tukwila, WA 98188 no later than 10 days from the above date by written
appeal stating the basis of the appeal for specific factual objections. You may be
required to bear some of the expenses for an appeal.
Copies of the procedures for SEPA appeals are available with the City Clerk and
Planning Department.
FM.DNS
CHESIST: ENVIRONMENTAL REVIEW MAI GS
FEDERAL AGENCIES
( ) U.S. Army Corps of Engineers vl U.S. Environmental Protection Agency
D,/(,Federal Highway Administration ( )U.S. Department of H.U.D. (Region X)
WASHINGTON STATE AGENCIES
( ) Office of Archaeology
o \(A Transportation Department bi-(
o Department of Fisheries
( ) Office of the Governor
( ) Planning & Community Affairs Agency (
)Dept. of Social and Health Services
Dept. of Ecology, Shorelands Division
Dept. of Ecology, SEPA Division *
)Department of Game
)Office of Attorney General
* Send checklist with all determinations
KING COUNTY AGENCIES
( ) Dept. of Planning & Community Devel.
( ) Fire District 18
( ) Boundary Review Board
( ) Health Department
( ) South Central School District
( ) Tukwila Library
( ) Renton Library
( ) Kent Library
J( ) Pacific Northwest Bell Telephone
X) Seattle City Light
( ) Washington Natural Gas
( ) Water District 75
( ) Seattle Water Department
( ) Group W Cable
( ) Kent Planning Department
( ) Tukwila Board of Adjustment
( ) Tukwila Mayor
Tukwila City Departments:
( ) - Public Works
( ) - Parks and Recreation
( ) - Police
( ) - Fire
( ) - Finance
( ) - Planning/Building
( )Fire District 1
( )Fire District 24
( )Building & Land Development Division -
SEPA Information Center
SCHOOLS /LIBRARIES
( )Highline School District
( )King County Public Library
( )Seattle Municipal Reference Library
UTILITIES
( )Puget Sound Power & Light
( )Val -Vue Sewer District
( )Water District 20
( )Water District 25
( )Water District 125
( )Union Pacific Railroad
CITY AGENCIES
( )Renton Planning Department
( )Tukwila Planning Commission
Tukwila City Council Members:
( )- Edgar Bauch
( )- Marilyn Stoknes
( )- Joe Duffie
( )- Mabel Harris
( )- Charlie Simpson
( )- Jim McKenna
( )- Wendy Morgan
OTHER LOCAL AGENCIES
( ) Puget Sound Council of Government(PSCOG)
( ) Puget Sound Air Pollution Control Agency
( ) Tukwila /Sea -Tac Chamber of Commerce
( ) Daily Journal of Commerce
D�(X.)
MEDIA
)METRO Environmental Planning Division
Office /Industrial 10,000 gsf or more
Residential 50 units or more
Retail 100,000 gsf or more
( )Highline Times
( )Seattle Times
• •
1- 07.5(5) Prevention of Environmental Pollution and Preservation of Public Natural
Resources (New Section)
All costs pertaining to the prevention of environmental pollution and the preservation of
public natural resources will be considered as incidental to the construction of this
project and such costs shall be included in the bid prices in the various items which
comprise this contract.
In addition to the requirements of Section 1 -07.5, the Contractor shall comply with the
following environmental provisions which are made a part of the contract documents.
A copy of the environmental provisions is available to the Contractor at the Engineer's
office.
If the Contractor's operations involve work outside the areas covered by the following
environmental provisions he shall advise the Engineer and request a list of any
additional environmental provisions covering the area involved; A copy of any
additional environmental provisions is also available to the Contractor at the Engineer's
office.
Regulation I Puget Sound Air Pollution Control Agency
Regulation II Puget Sound Air Pollution Control Agency
Article 10 - Removal and Encapsulation of Asbestos Material
King County Solid Waste Code - Chapter 10.04 et al.
King County Noise Code - Noise Control
City of Tukwila Chapter 8.36 - Noise Control
1- 07.5(6) Archaeological and Historic Preservation (New Section)
On the private and public lands of this State, it shall be unlawful for any person, firm,
corporation or any individual to knowingly alter, dig into or excavate by use of any
mechanical, hydraulic, or other means, or to damage, deface or destroy any historic or
prehistoric archaeological resource or site....without having obtained written permission
from the preservation officer for such activities on public property " (RCW 27.53.060).
It shall be the responsibility of the Contractor to notify the Engineer if any artifacts,
skeletal remains or other archaeological resources (as defined under RCW 27.53.040)
are unearthed during excavation or otherwise discovered on the construction site. If
ordered by the Engineer. the Contractor shall immediately suspend any construction
activity which, in the opinion of the Engineer, would be in violation of RCW 27.53.
Suspension of the Work shall remain in effect until the Engineer has obtained
permission to proceed from the State Historic Preservation Officer.
1 -07.6 Permits and Licenses
Supplement with the following:
The Contractor shall furnish the Engineer with one copy of each permit issued for
borrow, filling, or wasting material required for or generated by the contract work.
The Contractor shall notify the Engineer in writing of the location of all borrow,
filling and waste sites regardless of whether a permit is required.
Interurban Ave. S. - 42nd Ave. S. to 52nd Ave. S.
City of Tukwila •
July 1991 GR -14
• •
The Contractor shall assure himself that all necessary permits are obtained and
shall review any that were not obtained by him in order that he is familiar with the
requirements of the permits. These permits and licenses, where required, shall be
obtained at the Contractor's expense. The Contractor shall comply with all
provisions on these approvals. The City will obtain the Department of Fisheries
HPA for this project.
No general building permit is required. Any other specific permits, fees, licenses,
inspections, and the like, which may be required, shall be obtained and paid for by
the Contractor. This shall not include customary supervision and inspection by the
Engineer, which will be furnished at no cost to the Contractor.
A copy of each permit and license shall be furnished to the Engineer upon
request.
1 -07.14 Responsibility for Damage
Supplement with the following:
With respect to the performance of this Agreement and as to claims against the
City, its officers, agents and employees, the Contractor expressly waives its
immunity under Title 51 of the Revised Code of Washington, the Industrial
Insurance Act, for injuries to its employees and agrees that the obligation to
indemnify, defend and hold harmless provided for in this paragraph extends to any
claim brought by or on behalf of any employee of the Contractor. This waiver is
mutually negotiated by the parties.
The Contractor agrees to indemnify, defend and hold harmless the Owner and its
Consulting Engineer, and the Engineer and their officers, employees, and agents
to the extent detailed in this section of the Standard Specifications.
1 -07.15 Temporary Water Pollution,' Erosion Control
Modify and /or supplement with the following:
Temporary water pollution control work shall consist of placing filter fabric over
storm drainage structures during construction and cleaning the fabric periodically,
as directed by the Engineer.
These and other temporary water pollution/erosion control measures — except as
detailed below —shall be performed on an as- needed- basis, as directed by the
Engineer, and will be paid for by the lump sum contract price for "Temporary
Water Pollution /Erosion Control".
Temporary water pollution control work shall also consist of placing a filter fabric
fence as shown in the details in the Appendix at the direction of the Engineer. The
unit contract price per linear foot for "Filter Fabric Fence" , shall be full
compensation for all labor, materials and equipment necessary to construct the
fence in accordance with the detail.
Interurban Ave. S. - 42nd Ave. S. to 52nd Ave. S.
City of Tukwila
July 1991 GR -15
• •
1- 07.15(1) Water Quality Considerations (APWA Only)
Supplement with the following:
(7)
Filling: Only select sands and gravels shall be placed in direct contact with
water.
All debris, overburden, and other waste materials shall be disposed of in such
a manner as to prevent their entry by drainage, high water, or other means
into a waterway.
(8) If work is suspended for an extended period of time, the Contractor shall take
all action necessary to control erosion, pollution, and runoff during the shut
down period.
1 -07.16 Protection and Restoration of Property
Supplement with the following:
The Contractor shall not trespass upon private property and shall be responsible
for all injury or damage to persons or property, directly or indirectly, resulting from
his operations in completing this Work. He shall comply with the laws and
regulations of the Owner, County, and State and Federal governments, relating to
the safety of persons and property, and will be held responsible for and required
to make good any injury or damage to persons or property caused by
carelessness or neglect on the part of the Contractor or subcontractor(s), or any
agent or employee of either during the progress of the Work and until its final
acceptance.
Property lines, limits of easements, and limits of construction permits are indicated
on the Plans, and it shall be the Contractor's responsibility to confine his
construction activities to within these limits, unless he makes arrangements for use
of private property. Before using any private property adjoining the Work, the
Contractor shall file with the Engineer a written permission of the property owner,
and upon vacating the premises the Contractor shall furnish the Engineer with a
release from all damages, properly executed by the property owner.
The Contractor shall confine his equipment, storage of materials and operation of
work to the limits indicated by law, ordinances direction of the Engineer, and shall
not unreasonably encumber the premises with his materials.
The Contractor shall be responsible for the protection of all existing utilities and
structures on or adjoining the premises, as covered in Section 1 -07.17 of the
Standard Specifications.
Bushes, trees, and shrubbery that are temporarily removed by the Contractor shall
have the roots carefully balled and wrapped in burlap and be replaced in their
original location as soon as possible. Should the bushes, trees, or shrubbery die,
the Contractor shall replace them in kind at his own expense.
Interurban Ave. S. - 42nd Ave. S. to 52nd Ave. S.
City of Tukwila
July 1991 GR -16
Promptly after award of the contract, the Contractor shall submit to the Engineer
for approval a construction schedule consisting of a chart which sets out
operations, methods, equipment, and labor forces that the Contractor will use to
complete the - contract by the specified date. The chart shall show early and late ��
start dates and early and late finish dates for the items of work required under the i5
contract: All paving operations are to be completed before November , or
after March 1, 1992. Payment to the Contractor on any estimate may be withheld
until such schedule has been submitted and approved. The schedule must be
available for discussion at the Preconstruction conference.
Adequate equipment and forces based on the construction schedule shall be
made available by the Contractor to start work immediately upon order of the
Engineer and to carry out the schedule to completion of the contract by the date
specified.
Should it become evident at any time during construction that operations will or
may fall behind the schedule, the Contractor shall, upon request, promptly submit
a revised schedule in the same form as specified herein, setting out operations,
methods, and equipment, added labor forces or working shifts, night work, etc. by
which time lost will be made up, and confer with the Engineer until an approved
modification of the original schedule has been secured. Further, if at any time any
portion of the accepted schedule is found to conflict with the contract provisions, it
shall, upon request. be revised by the Contractor and the work shall be performed
in compliance with the contract provisions. Payments of any further estimates to
the Contractor after such request is made and until an approved modified
schedule has been provided by the Contractor may be withheld. Execution of the
work according to the accepted schedule of construction, or approved
modifications thereof. is hereby made an obligation of the contract.
1- 08.3(1) Order of Work (New Section)
The following elements shall take place as indicated. Other elements not listed are
subject to scheduling at the Contractor's discretion. The Contractor's submitted
progress schedule shall reflect the following requirements:
1. Submittal and approval of traffic control plans shall occur before existing
traffic is disrupted.
2. Two -way traffic shall be maintained at all times on South 133rd Street within
the project limits during bridge demolition and the roadway restoration detour.
3. Shoring and cribbing necessary to construct the Retaining Wall W -1 westerly
of the existing wooden bridge to be removed will be in place prior to the
detour to allow for embankment construction and restoration of two -way traffic.
4. Shoring and cribbing necessary to confine the roadway embankment and
allow for construction of Retaining Wall W -2 and the pipe arch augercast
pilings and footing will be placed during the detour.
5. schedule 2j construction shall start no later than October 1, 1991.
Interurban Ave. S. - 42nd Ave. S. to 52nd Ave. S.
- City of Tukwila
July 1991 GR -27
• •
6. Retaining Wall W -2 construction, pipe arch construction, and Schedule 2
outfall construction shall be completed before October 1, 1991, or shall be
started and completed between June 15, 1992 and September 15, 1992.
1- 08.3(2) Preconstruction Conference (New Section)
A preconstruction conference shall be held at a time and place fixed by the Engineer
which will be within two weeks from date of notice of award. The Contractor must be
prepared for a thorough discussion and review, as well as revision which may be
deemed necessary in the opinion of the Engineer, of the following:
Progress Schedule
Materials List
Equipment List
Job Procedures
Inspection Procedures
Plans and Specifications
Shop Drawings
Supplemental Drawings
Schedule for Value of Lump Sum Work
Other Matters Pertaining to Performance of the Work
Prevailing Wage Rate Certification
Acceptance by the Engineer of the progress schedule shall not in any event excuse the
Contractor of the obligation to complete the work within the time specified in the
contract or of complying with all terms, conditions and provisions of the Contract
Documents. Failure of the Contractor to follow the progress schedule submitted and
accepted, including revisions thereof, shall relieve the Owner of any and all
responsibility for furnishing and making available all or any portion of the job site from
time to time, and will relieve the Owner of any responsibility for delays to Contractor in
the performance of the work.
1 -08.4 Notice to Proceed and Prosecution of Work (APWA only)
Supplement with the following:
An official notice will be sent to the Contractor duly dated and signed by an official
or agent of the Owner and shall be known as the Notice to Proceed. The contract
time for the project will start with the day following the date of the Notice to
Proceed regardless of whether the Contractor actually begins his work by that
date. The Contractor may not begin work on the project until receipt of this notice.
The Contractor shall provide evidence to the Engineer that signal poles and other
critical material orders have been placed within thirty (30) calendar days of Notice
to Proceed.
1 -08.5 Time for Completion (APWA only)
Supplement with the following:
Interurban Ave. S. - 42nd Ave. S. to 52nd Ave. S.
City of Tukwila
July 1991 GR -28
• •
2 -01.5 Payment
Delete this section in its entirety and replace it with the following:
"Clearing and Grubbing" per lump sum.
The lump sum bid price for "Clearing and Grubbing" shall be full compensation for
all work described herein, including roadside cleanup.
2 -02 REMOVAL OF STRUCTURES AND OBSTRUCTIONS
Delete this section in its entirety except where noted, and replace it with the following:
2 -02 REMOVAL OF EXISTING STREET IMPROVEMENTS FOR MUNICIPAL TYPE
CONSTRUCTION PROJECTS (New Section)
2 -02.1 Description
This work shall consist of the removal and disposal of various existing improvements
including, but not limited to, pavement, curb, curb and gutter, storm drain pipe and cul-
verts, catch basins, manholes, existing posts, fences, guard rail, pavement markings,
monuments, and other items necessary for the accomplishment of the improvement.
This work shall also include bridge demolition and removal of concrete slope protec-
tion. Some of the items may be included in the bid proposal or covered elsewhere in
the Standard Specifications or Special Provisions.
Removal of items not contained in this section or in other sections of the Special Provi-
sions and not identified with a pay item shall be considered as incidental to the con-
struction, and the costs thereof shall be included in other items of the Contract.
2 -02.3 Construction Requirements
2- 02.3(1) General Requirements
The Contractor shall arrange to dispose of waste at no expense to the Owner and any
such disposal shall meet the requirements of Section 2- 03.3(7)C of the Standard Speci-
fications.
2- 02.3(2) Removing Existing Bridge
All portions of the existing creosote treated timber structure located between Sta
92 + 00 and Sta 94 + 00 shall be removed down to a minimum of three feet below the
„proposed sub rade line and all portions of the existing bridge. including timber piling,
which interfere with the new work shall be completely removed. The Contractor shall
submit to the Engineer for approval his method of bridge demolition, which will include
plans for stream diversion through the demolition site. Demolition of the bridge shall
not commence until such approval is given in writing. Demolition will occur within the
Interurban Ave. S. - 42nd .Ave. S. to 52nd Ave. S.
City of Tukwila
July 1991 TP1 -2
• •
time limitations given in Section 1- 07.23(2)A of these Special Provisions. Explosives
shall not be used in the demolition.
'Stream diversion through the demolition site will also provide for construction of the au-
gercast pilings, pipe arch, weirs, and Retaining Wall W -2. The diversion structure shall
be secured to the existing 66 -inch corrugated metal pipe and have a flow capacity of at
least 62 cfs. The diversion plan shall have contingency for overflow capability which
will prevent backwater upstream that could cause flooding. Any damage to the Con-
tractor's operation, equipment, or materials caused by overflow will be the sole respon-
sibility of the Contractor and at the Contractor's expense.
All material to be removed from the existing bridge shall become the property of the
Contractor and shall be removed from the site or otherwise disposed of as directed by
the Engineer. Payment will be made at the lump sum contract price for "Removing Ex-
isting Bridge", which price shall be full compensation for all costs in connection with re-
moving and disposing of the material and constructing the stream diversion as noted in
the Plans and in accordance with these Special Provisions.
toe of\
The Contractor shall take special precaution in the removal operations so no damage
of any kind whatsoever occurs to the 66 -inch corrugated metal pipe and concrete
headwall underneath the bridge, the 18 -inch sanitary sewer adjacent to the bridge, and
the adjacent Metro ETS Pipeline. In the event that any damage occurs by the Contrac-
tor's operations, it shall be repaired to the satisfaction of the utility, at the Contractor's
expense.
Plans of the existing structure are available for viewing at the Tukwila Public Works De-
partment.
2- 02.3(3) Removal of Pavement, Sidewalks, and Curbs
The Contractor shall remove existing pavement, curb, and curb and gutter as shown on
the plans or as necessary for the accomplishment of the improvement.
Existing asphalt concrete pavement that is considered unsatisfactory by the Engineer
for an overlay of asphalt concrete pavement shall be. removed. Removal of unsatisfac-
tory existing asphalt concrete pavement for an overlay shall be measured and paid for
as "Remove Asphalt Concrete Pavement ". All other pavement removal shall be includ-
ed as part of payment for pipe if it is required for trench excavation or construction of
underground utilities or as part of roadway excavation as defined in Section 2 -03.
2- 02.3(3)A Cutting Pavement
All transitions to existing asphalt or cement concrete driveways, curb and gutter, and
walkways shall be vertically sawcut at least two (2) inches with straight, uniform edges.
Existing asphalt pavement roadway edge may be cut with a wheel, provided the wheel
cut is full depth and no damage occurs to the pavement which is to remain. No impact
tools or pavement breakers can be used for trench crossing of existing pavement.
Trench crossing of existing pavement shall be vertically sawcut per Standard Plan H -11
and as directed by the Engineer.
Interurban Ave. S. - 42nd Ave. S. to 52nd Ave. S.
City of Tukwila
July 1991
TP1 -3
DIVISION 2
EARTHWORK
2 -01 CLEARING, GRUBBING AND ROADSIDE CLEANUP
Clearing and Grubbing shall conform to the requirements of Section 2 -01 of the
Standard Specifications with the following modifications:
2 -01.1 Description
Add:
This work shall consist of clearing and grubbing along South 133rd Street and
South Interurban Avenue as required for placement of the storm drainage pipe.
2 -01.2 Disposal of Usable Material and Debris
Delete paragraphs 2- 01.2(1) Disposal Method No. 1 - Open Burning and 2- 01.2(3)
Disposal Method No. 3 - Chipping.
Add:
Unless otherwise specified, the Contractor shall remove obstructions including, but
not limited to, brush. trees, Togs, stumps, roots, heavy sod, vegetation, rock, stones
larger than 6 inches in any dimension, and debris where the completion of the
work require their removal. All extraneous material exposed in the excavation
including, but not limited to, existing piling, pile caps, boulders or rock shall be
removed to 12 inches below the bottom of the bedding or foundation concrete.
No burning of combustible materials will be permitted. Remove all cleared and
grubbed material from the worksite and dispose of in accordance with all laws,
codes, and ordinances.
2 -01.3 Construction Requirements
Add:
No trees shall be removed without authorization from the Engineer.
No areas shall be cleared or grubbed more than 5 days in advance of excavation,
grading, or any other construction activities. The Contractor shall notify the
Engineer in writing one week in advance of his intent to start site clearing and
grubbing.
Fostoria Interurban Draioaae Pipeline
City cat Tukwila
July 1991
TP2 -2
• •
Add:
2- 01.3(3) Preservation of Trees, Shrubs and Other Vegetation
Protect trees, shrubbery, and other vegetation not designated for removal from damage
resulting from the work. Cut and remove tree branches only where, in the opinion of
the Engineer, such cutting is necessary to effect construction operation. Branches shall
be cut at the trunk of the tree. Remove branches other than those required to effect the
work to provide a balanced appearance of any tree, as approved prior to removal.
Scars resulting from the removal of branches shall be treated with an approved tree
sealant.
Trees designated for protection shall be protected by fencing or armoring. The tree
protection shall be placed before any excavation or grading is begun and shall be
maintained in good repair for the duration of the construction work unless otherwise
directed by the Engineer. No material shall be stored or construction operation carried
on within 10 feet of any tree designated to be saved.
Any damage to existing trees crowns or root systems shall be repaired immediately by
a tree surgeon approved by the Engineer. If roots are exposed or damaged during
grading operations, protruding roots shall immediately be cut off cleanly, cut surfaces
shall be painted with tree paint approved by the Engineer, and topsoil shall be spread
over the exposed root area. If any trees to be saved are severely injured by
mechanical equipment the Contractor shall replace with same species and size.
2 -01.4 Measurement
Clearing, grubbing and roadside cleanup shall not be measured for payment.
2 -01.5 Payment
There will be no separate payment for clearing, grubbing and roadside cleanup.
Clearing, grubbing and roadside cleanup shall be considered incidental to other bid
items in this contract.
2 -02 REMOVAL OF STRUCTURES AND OBSTRUCTIONS
Removal of structures and obstructions shall conform to the requirements of Section 2-
02 of the Standard Specifications with the following modifications:
2 -02.1 Description
Add:
This work shall consist of removal of asphalt concrete pavement, curbs, sidewalks
and drainage structures and other miscellaneous items as required for placement
of the storm drainage pipeline.
Fostoria'Interurban Drainage Pipeline
City of Tukwila
July 1991
TP2 -3
DIVISION 8
MISCELLANEOUS CONSTRUCTION
8 -01 EROSION CONTROL
8- 01.3(2) Topsoil
Supplement with the following:
No topsoil is required in Erosion Control Seed or Drainage Swale Seed planting
areas as delineated on the Plans.
8- 01.3(4)A Seeding
Supplement with the following:
Drainage Swale Seed and Erosion Control Seed shall be applied at a rate of one
hundred twenty (120) pounds per acre. Seed shall be in accordance with Section
9 -14.2 of the Standard Specifications, as supplemented by these Special
Provisions.
Proportions Percent Percent
Erosion Control Seed Mixture by Weight Purity Germination
Hard fescue 10% 85 80
(Festuca ovina duriuscula)
Tall fescue (Festuca arundincea) 40% 95 90
(Arid, Jaguar. or Rebel)
Perennial rye (Lolium Perenne) 40% 95 90
(Derby or Pennant)
Dutch White Clover (Trifolum repens) 10% 95 90
(Innoculated- Bacteria Fixed)
Proportions Percent Percent
Drainage Swale Seed Mixture by Weight Purity Germination
Tall fescue -Fawn 40% 98 90
(Festuca arundinacea)
Seaside Colonial Bent 20% 98 90
(Agrostis tenuis sibth)
Meadow Fescue (Festuca elatior) 20% 92 80
Meadow Foxtail (Alopecurus pratensis) 10% 98 90
Birdsfoot trefoil (Lotus Corniculatus) 5% 90 80
Alsike Clover (Trifolium hybridum) 5%
Interurban Ave. S. - 42nd Ave S. to 52nd Ave. S.
City of Tukwila
July 1991 TP1 -46
• •
8- 01.3(4)B Fertilizing
Supplement with the following:
The fertilizer for all seed areas shall be 10 -20 -20 with fifty (50) percent WIN (water
insoluble nitrogen) applied at the rate of four hundred (400) pounds of available
nitrogen per acre of seeded area.
8- 01.3(5) Mulching
Supplement with the following:
Hydroseed mulching is required throughout all seeded areas. Provide ERO -FIBER
mulch or equivalent approved by the Engineer at 2,500 pounds per acre. Straw
mulch is not acceptable.
8- 01.3(8) Placing Jute or Excelsior Matting or Clear Plastic Covering
This section is deleted in its entirety.
8- 01.3(9) Protection and Care of Seeded Areas
Supplement with the following:
Seeded areas shall be kept moist until accepted by Engineer.
8- 01.3(11) Mowing
Supplement with the following:
No mowing is required in Erosion Control or Drainage Swale Seeding areas.
8 -01.5 Payment
Measurement and payment will be made for the following items per the Standard
Specifications as amended below:
16. "Erosion Control Seeding, Fertilizing, and Mulching", per square foot.
The unit contract price per square foot for "Erosion Control Seeding,
Fertilizing and Mulching" shall be full pay for furnishing all materials, labor,
equipment, and all items required to complete the work as specified, including
providing a soil binder or tacking agent.
17. "Drainage Swale Seeding, Fertilizing, and Mulching ", per square foot.
The unit contract price per square foot for "Seeding, Fertilizing and Mulching"
shall be full pay for furnishing all materials, labor, equipment, and all items.
Interurban Ave. S. - 42nd Ave S. to 52nd Ave. S.
City of Tukwila
July 1991 TP1 -47
• •
required to complete the work as specified, including providing a soil binder
or tacking agent.
8 -02 ROADSIDE PLANTING
8 -02.1 Description
Supplement with the following:
Scope
The work described in this section includes providing all materials, tools, equip-
ment, and labor for soil preparation and finish grading, fertilizing, mulching, instal-
lation of trees. shrubs, mulch, groundcover, sod and annual color, tree staking, re-
location of existing plant material, and maintenance at the site.
Contractor Qualification
The Contractor shall be experienced in landscape projects of similar size and
scope to that indicated on the Plans and specifications herein. Staff and capabil-
ities of Contractor shall be of sufficient size to be able to furnish required materi-
als, delivery, and installation of all materials as shown on the Plans and specified
herein. The Contractor shall provide sufficient, well- maintained equipment for
prompt expedition of the work. Upon request by the Engineer, the Contractor shall
submit a statement listing quantity and type of equipment proposed for use on the
job, the positions and competence of workmen employed, and verification of ability
to work with and install large plant material.
Coordination
The Contractor shall be fully cognizant of all construction plans, utility drawings,
specifications, and work by others that may pertain to this project. The Contractor
shall also coordinate plant material and irrigation head locations to avoid conflicts.
Materials and Workmanship
All materials and workmanship that are obviously needed for the proper fulfillment
of this contract shall be furnished as fully as if they were particularly described or
delineated.
Underground Obstructions
The Contractor shall locate all underground utilities prior to starting work and shall
not disturb or damage said utilities. Contractor shall promptly notify the Engineer
of any conflict between the proposed work and any obstructions. Failure to follow
this procedure places upon the Contractor the responsibility and the expense for
making any and all repairs for damage.
Interurban Ave. S. - 42nd Ave S. to 52nd Ave. S.
City of Tukwila
July 1991 TP1 -48
• •
8 -02.2 Materials
Supplement with the following:
Submittals
The Contractor shall provide the Engineer with documentation that all specified
plant materials have been ordered four (4) months prior to beginning landscape
construction. Documentation shall list supplier's names, addresses, and phone
numbers, and shall list the respective growing /storage addresses of all specified
plant materials.
Contractor shall receive approval from the Engineer for the following prior to instal-
lation:
Trees and Shrubs
Fertilizer and Soil Amendments and Auxiliary Soil Substance
Mulch
Topsoil
Red Lava Rock
Root Barrier
Landscape Fabric
8- 02.3(4) Preparation. Cultivation and Cleanup
Supplement with the following:
- Thoroughly scarify subgrades in tree and shrub planting areas to a minimum depth
of /six 4t.) inches. Scarified subgrades shall be inspected and approved by the En-
gineer in writing prior to placement of topsoil. Any topsoil placed prior to approval
of subgrades by the Engineer shall. be removed at no additional cost to the Owner.
Remove all construction debris and rocks over one (1) inch diameter prior to
placement of topsoil.
Delete the final paragraph of this section of the Standard Specifications and replace it
with the following:
Upon approval of subgrades by the Engineer, place topsoil Type A to an eight (8)
inch depth in all tree and shrub areas as shown on Plans. Rotovate to a depth of
ten (10) inches. Remove rocks and debris over one (1) inch in diameter. Lightly
compact soil and establish smooth and uniform finish grades ensuring that no ob-
structions to surface drainage are present. After settling, finish grades are to be
one -half (1/2) inch below top of curbs or pavement in hydroseed areas and three
(3) inches below top of curbs or pavement in shrub areas. Finish grade is defined
as the top surface of planting soil prior to installation of Composted Saw -
dust/Manure Mulch and Lava Rock in shrub and tree areas and prior to hydro -
seeding in Erosion Control areas.
Interurban Ave. S. - 42nd Ave S. to 52nd Ave. S.
City of Tukwila
July 1991 TP1 -49
• •
8- 02.3(5) Layout of Planting
Delete paragraphs five (5) and six (6) of this section of the Standard Specifications.
8- 02.3(6) Planting
Supplement with the following:
The Contractor shall provide plant quantity as shown on the Plans or plant sched-
ule, whichever is greater, or to ensure coverage at the specified spacing.
Plant material shall be handled in such a manner that the root systems are kept
covered and moist at all times. Plants which receive unsatisfactory treatment, as
judged by the Engineer, during transport from the source or on the jobsite shall be
rejected. Immediately remove all rejected plant material from the jobsite.
All costs associated with furnishing and applying fertilizer, other plant specific
amendments and staking as specified shall be included in and considered inciden-
tal to the unit contract price for the various plant selection items involved.
Dig tree and shrub pits per the details and locations indicated on the Plans. Install
root barriers in tree pits per plan. Backfill with specified topsoil and add fertilizer
and auxiliary soil substance. Remove wire baskets and top one -half (1/2) of burlap
from tree root balls. Thoroughly water pits after placing plants and add topsoil as
required to fill pits. Water again and tamp soil to a grade not higher than the root
crown leaving a shallow basin around the base of each tree and shrub.
Planting shall be done under the supervision of a person experienced in horticul-
tural practice.
8- 02.3(7) Pruning. Staking, Guying and Wrapping
Supplement with the following:
a. Tree stakes shall be No. 5 rebar with no burrs.
b. Wire shall be 16 gauge galvanized.
c. Hose shall be new one -half (1/2) inch diameter soft dark green rubber hose.
All trees shall be staked at the time of planting after backfilling has been complet-
ed. Trees shall be staked with one No. 5 rebar. The rebar shall be installed per
the tree planting detail shown in the plans. The rebar shall penetrate at least one
foot of undisturbed soil in a tree pit. Care shall be taken by the Contractor when
placing the stake so as not to damage the root ball or underground utilities. It shall
be the Contractor's responsibility to locate and protect underground utilities. Dam-
age to any utilities shall be repaired by the authorities having control of same, and
the expense of such repairs shall be charged to the Contractor. The rebar and the
tree shall be joined by three (3) ties formed of sixteen gauge galvanized steel wire
in one loop which crosses itself between the tree and the pipe as detailed on the
plans. Before placing, the wire shall be strung through a six (6) to eight (8) inch
Interurban Ave. S. - 42nd Ave S. to 52nd Ave. S.
City of Tukwila
July 1991 TP1 -50
• •
length of one -half (1/2) inch diameter soft dark green rubber hose to serve as a
tree trunk protector.
The wire shall be tied tightly to the rebar so as to prevent vertical movement but
shall be loosely applied around the tree trunk. The topmost tie should be of an ap-
proximate height of four (4) feet six (6) inches with equal spacing between the tree
ties (plus or minus one inch). After securing, bend wire twist down and around re-
bar to avoid contact with people using the sidewalk.
8- 02.3(9) Mulch
Supplement with the following:
The Contractor shall install composted sawdust/manure mulch to uniform two (2)
inch depth throughout all tree and shrub planting areas.
8- 02.3(10) Soil Amendments
Supplement with the following:
Soil amendment type and quantities shall be added per soil testing laboratory rec-
ommendations.
8- 02.3(12) Plant Establishment
The last paragraph is revised to read:
All automatic irrigation systems shall be operated fully automatic during the plant
establishment period and until final acceptance of the contract.
During the second and third year plant establishment period, the Contractor shall
perform work as described above on a force account basis at the direction of the
Engineer.
Supplement with the following:
There shall be a one (1) year landscape establishment period under this contract.
This one (1) year period will begin on the day the landscaping is declared com-
plete by letter from the City of Tukwila.
Landscape establishment shall also include but not be limited to the applications
of additional fertilizers as required; spraying for insects and /or disease as specifi-
cally approved by the City of Tukwila; tightening and repair of tree staking; weeding
of all new planting areas; repair of erosion damage, and cleanup of soil, mulch,
etc., deposited on sidewalks, streets, and gutters from any erosion.
Interurban Ave. S. - 42nd Ave S. to 52nd Ave. S.
City of Tukwila
July 1991 TP1 -51
• •
Trees and Plantings
Weeds shall be removed from planting areas at least twice each month during the
growing season (April 1 to October 1) and at other times as necessary. Weed
control may be accomplished with herbicides IF SPECIFICALLY APPROVED BY
THE ENGINEER PRIOR TO APPLICATION. All weeds and prunings shall be dis-
posed of by the Contractor off the project site. Mulch shall not be allowed to scat-
ter onto paved areas.
Watering
All plants shall be watered by the Contractor as needed to keep them in healthy
growth.
Shrub Fertilizer
In early March and late November, the Contractor shall apply a 15 -5 -10 fertilizer at
manufacturer's recommended rate.
Groundcover Fertilizer
In March, June, and September, the Contractor shall apply a 15 -5 -10 fertilizer at
manufacturer's recommended rate.
Mulch Cover
The Contractor shall maintain specified depth of mulch in the planting beds that
were originally mulched. If mulch is disturbed by maintenance staff or others, it
shall be releveled or replaced to specified depth.
The Contractor shall keep mulch loose and raked to maintain even coverage and
appearance.
Tree Fasteners
All rubber hoses with galvanized wire shall be kept intact and effective in maintain-
ing firm support. Galvanized wire shall be adjusted as needed by the Contractor to
prevent strangulation or irregular growth of the tree. Galvanized wire shall be re-
moved only when directed by the Engineer.
Application of Herbicides and Insecticides
The Contractor shall assume all responsibility for rendering any plantings unsatis-
factory by reason of chemical application. Any damage to adjacent areas on or
off the right -of -way shall be repaired to the satisfaction of the Engineer, and the
cost of such repair shall be borne by the Contractor. The use of chemicals as out-
lined above will not be allowed if such use will leave any residue in the soil toxic to
the plant materials specified in the contract for planting.
All spraying shall be done by an applicator possessing a current State of Washing-
ton Public Pesticide Applicator's license. The Contractor shall notify the Engineer
twenty-four (24) hours prior to the application of any herbicide, giving the name of
Interurban Ave. S. - 42nd Ave S. to 52nd Ave. S.
City of Tukwila
July 1991 TP1 -52
• •
the material, rate of application, and where it is to be used. Application of herbi-
cide shall be in accordance with the recommendation of the manufacturer.
Insect and disease control shall be directed at an early and effective response to
specific problems as they occur. All trees shall be sprayed with the proper insec-
ticides as necessary to control disease infestation by harmful insects and pests,
including the complete control of caterpillars.
Cleanup
A general cleanup shall be made after any work done by the Contractor on the
project site.
8- 02.3(13) Plant Replacement
Supplement with the following:
Prior to acceptance of the initial planting, the Contractor shall be responsible for
damages or loss due to vandalism or theft and shall replace all dead, missing or
unsatisfactory plant material under this Contract.
During the first (1st) year of the landscape establishment period, plants that die or
are in an unhealthy, unsightly, or badly impaired condition or fail to show signs of
vigorous life, shall be replaced as soon as is reasonably possible after the unsatis-
factory condition has become evident. The Contractor shall not be responsible for
damage or loss due to vandalism after acceptance of initial planting.
The guarantee, as specified, on all plant material furnished and planted under this
contract shall be for one (1) full calendar year which shall coincide with the dates
of the first year of plant establishment.
All planting shall be performed during normal working hours and in the same man-
ner as specified for the original plantings under conditions suitable for such work.
8- 02.3(16) Auxiliary Soil Substance (New Section)
The Contractor shall apply auxiliary soil substance into planting pits of all trees and
shrubs per the manufacturer's recommendations and shall thoroughly incorporate with
topsoil in planting pits at time of planting. The Contractor shall submit purchase orders
and containers for tallying by the Engineer.
8- 02.3(17) Landscape Fabric (New Section)
The Contractor shall furnish and install landscape • fabric per manufacturer's recom-
mendations above the composted sawdust mulch and below the red lava rock mulch,
as shown on the detail in the Plans.
Interurban Ave. S. - 42nd Ave S. to 52nd Ave. S.
City of Tukwila
July 1991 TP1 -53
• •
8- 02.3(18) Root Barrier (New Section)
The Contractor shall furnish and install root barrier per manufacturer's recommenda-
tions and as detailed on the Plans.
8 -02.5 Payment
Measurement and payment will be made for the following items, per this Section of the
Standard Specifications, which shall be full pay for constructing the Work as specified:
1. "Tree (botanical name), (common name)", per each.
2. "Shrub (botanical name), (common name) ", per each.
Measurement for trees and shrubs shall be based on the per each number in-
dicated on the Plans, and shall be full compensation for all costs necessary to
furnish, plant, fertilize, stake, and cultivate the particular items as specified, in-
cluding auxiliary soil substance.
3. "Topsoil Type A", per cubic yard.
4. "Mulch ", per cubic yard.
5. "Landscape Fabric", per square yard of coverage.
6. "Red Lava Rock" , per cubic yard.
7. "Root Barrier" , per linear feet.
8. "Plant Establishment", per lump sum.
8 -04 CURBS, GUTTERS, SPILLWAYS AND INLETS
Cement concrete curb, and curb and gutter Type A -1 shall be constructed in
accordance with Section 8 -04 of the Standard Specifications and the City of Tukwila
Standard Detail in the Appendix, except as hereinafter amended.
8- 04.3(1) Cement Concrete Curbs, Gutters, and Spillways
Supplement with the following:
The concrete mix for curbs and gutters shall be air entrained concrete Class 3000
per Section 6 -02 of the Standard Specifications, with a maximum slump of 3-1/2
inches.
Dummy joints of not less than 1/4 -inch thickness shall be of the same dimensions
as through joints, except that they shall extend only two (2) inches into gutter
section. Dummy joints shall be placed not to exceed 15 -foot spacing.
Interurban Ave. S. - 42nd Ave S. to 52nd Ave. S.
City of Tukwila
July 1991 TP1 -54
City of Tukwila
TO: Lt. C. Westby
FROM: Officer D. Dart
DATE: 06 -07 -91
SU BJEClRecommendations for Improvements on Interurban Ave S.
MEMORANDUM
6200 Southcenter Boulevard
Tukwila, Washington 98188
Police Department 433 -1808
After reviewing the plans submitted for the widening of Interurban Ave S, I
would like to make the following recommendations:
1. That a traffic light be installed at the entrance of Tukwila Commerce Park
located in the 12600 block. This intersection presently has a pocket for
trafficeturning left from the commerce park which then allows them to merge with
the s/b traffic on interurban. With this pocket eliminated and the increased
flow of traffic, I feel there will be an increase..in accidents involving vehicles
making left turns. The same problem was experienced at the intersection of
Sperry Drive and S. 180th St. until a traffic signal was installed..
Another reason that 'I feel the light would be a necessity is because when
the n/b traffic.stops for the red light at 42nd Ave S., this will hanper the
view of drivers wanting to turn left onto Interurban, as well as the fact
that 42nd Ave S has a large volume of afternoon rush hour traffic turning s/b
onto Interurban.
2. As for making an NOV lane n /b on Interurban from 52nd Ave S to the freeway
on -ramp for I -5, I would not designate that as an HOV lane but would mark it
"Right Turn Only" for traffic turning onto the on -ramp. With the middle lane
being marked for thru traffic or for right turn onto the on -ramp, this could
help alleviate traffic congestion when traffic stops for the red lights during
o I
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1 gu
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rush hours.
5-2 A.i
Iv
CITY OF TUKWILA
DEPARTMENT OF COMMUNITY DEVELOPMENT
ENVIHVNMtN i AL titVltW
ROUTI6GG FORM
EPIC: 2 9'/
PROJECT *604- 440,il/ if /f ����� ,, As
ADDRESS f'g // 5- djefal S.
DATE TRANSMITTED . q)iz/� �9/Y RESPONSE REQUESTED BY /��77/�
� l l DATE RESPONSE RECEIVED
STAFF COORDINATOR
e:attached environmental checklist' was received regarding °this project.:Please review and
.comment: below to advise the responsible official regarding the t l'eshold'determination.: •
environmental review file:is.available in the Planning Department through. the, above' stall
coordinator, ;Comments regarding the project you wish carried to the` Planning Commission
oard;ot Adjustment and City Council should:be submitted in the comment section.belQw<
<Y ,
ITEM
COMMENT
Date:
Comments prepared by:
00114181
CITY OF TUKWILA
DEPARTMENT OF COMMUNITY DEVELOPMENT
ENVIRONMENTAL REVIEW
ROUTING FORM
EPIC: c /
>Sui(ding Q Planning • Pub Wks _ �Ite :Pollceu Parksl.
PROJECT / k -6 t% WW1* /6/4-ail4/- f
ADDRESS fd a/,,,
DATE TRANSMITTED ` q j, f/ 99 RESPONSE REQUESTED BY la`4147�9/
STAFF COORDINATOR
DATE RESPONSE RECEIVED
e attached environmental checklist was received regarding this project. ''Please review and
comment below ;to; advise : the : responsible official regarding the thresholddetermiination The
environmental review .file is available in the Planning Department through`, the >'above'stf.�M
oordinator,. Comments regarding the project you wish carried to the Planning`Commisslo
oard of Adjustment and: City Council should be submitted in the comment section bolo
ITEM
COMMENT
Je/ecu ,d4y,tedd/ aLai ,ief, ,& "
r�nt\fj(�
JUN 0 71991
Ca Y Uf' 6 UNVV,LA
P
Date: Comments prepared by; ,
09114109
A. BACKGROUND
1. Name of proposed projects, if applicable:
Interurban Avenue South (42nd Avenue South to 52nd Avenue South) and South
133rd Street (South 134th Place to Interurban Avenue South) Street
Improvements.
I
Fostoria /Interurban Drainage Improvement S-fre,e
2. Name of applicant:
City of Tukwila
3. Address and phone number of applicant and contact person:
Applicant: Public Works Department
6300 Southcenter Boulevard
Tukwila, Washington 98188 (206) 433 -0179
Contact Person: Mr. Brian Shelton
4. Date checklist prepared:
November 26, 1990
5. Agency requesting checklist:
City of Tukwila
6. Proposed timing or schedule (including phasing, if applicable):
Construction is anticipated to start in the spring of 1991 and conclude in late
summer of 1992. r
7. Do you have any plans for future additions, expansion, or further activity related
to or connected with this proposal? if yes, explain.
Stream enhancement alternative evaluation and implementation are anticipated
upstream of the SR 599 culvert inlet.
Future connection to the junction structure located at the intersection of South
133rd and South 134th Streets will occur using a bypass pipeline that will
capture peak runoff from near the overcrossing of 42nd Avenue South with South
133rd Street. 1
8. List any environmental information you know about that has been prepared, or
will be prepared, directly related to this proposal:
None are known at this time.
87039-20 / Env Checklist /Interurban Ave S (41 -91) 2
• •
9. Do you know whether applications are pending for governmental approvals of
other proposals directly affecting the property covered by your proposal? If yes,
explain.
None are known at this time.
10. List any government approvals or permits that will be needed for your proposal,
if known.
Shorelines Permit, Sensitive Areas Permit, BAR.
11. Give brief, complete description of your proposal, including the proposed uses
and the size of the project and site. There are several questions later in this
checklist that ask you to describe certain aspects of your proposal. You do not
need to repeat those answers on this page. (Lead agencies may modify this
form to include additional specific information on project description.)
The proposed roadway improvements include widening Interurban Avenue South
and South 133rd Street. Interurban has a five lane configuration from South
133rd Street to 52nd Avenue South. The remainder of the roadway is two lanes
with left turn pockets to the SR 599 on -ramp, Tukwila Commerce Park, and 42nd
Avenue South. The improvements will widen the roadway to five and six lanes
through the project limit, construct an HOV queue jumper lane for northbound
traffic onto the 1 -5 on -ramp between the 52nd Avenue South transit pullout and
the ramp, and provide a transit pullout southbound on the far side of the South
133rd Street intersection. Edge improvements will include concrete curb and
gutter on both sides of the roadway, a five -foot planter strip, and a six -foot
sidewalk on the east side of the roadway. A ten -foot bicycle path will be
provided between the 1 -5 on -ramp and 52nd Avenue South on the east side. The
path will be combined with the sidewalk and transition to a 13 -foot pathway
between the 1 -5 on -ramp and 48th Avenue South where a bicycle route splits
from the roadway.
South 133rd Street has a two -lane configuration between Interurban and South
134th Place. Improvements will widen the roadway to four lanes and provide
concrete curb and gutter on both, sides of the street. A six - foot -wide sidewalk will
be constructed on the south side of the street.
Other street improvements include street drainage, grass -lined swales, new
signals, signal modifications, channelization, illumination, signing, walls,
landscaping, and removal of an existing wooden bridge.
The purpose of the Fostoria/Interurban Drainage Improvements is to provide
flooding control for the lower reaches of the Fostoria Basin drainage system.
The project starts at the intersection of South 133rd and South 134th Street with
a four -foot by eight -foot box culvert. The culvert continues northeast on South
133rd Street crossing under Highway 599 to a diversion structure. At this
structure, the box culvert terminates, a 66 -inch RCP begins, and an intertie is
made to an existing state 48 -inch diameter drain line. From the diversion
structure, the 66 -inch line crosses Interurban Avenue South to a manhole. At the
manhole, existing ditch drainage is intercepted from the southeast, and the 66-
inch drainage line now turns northwest to parallel Interurban Avenue South. The
pipe parallels Interurban until about 60 feet prior to the wooden bridge. At this
87039.20 / Env Checklist /Interurban Ave S (4.1.91) 3
point, the drainage pipe angle at a manhole and discharges into the existing
channel by the Tukwila Commerce Park.
12. Location of the proposal. Give sufficient information for a person to understand
the precise location of your proposed project, including a street address, if any,
and section, township, and range, if known. If a proposal would occur over a
range of area, provide the range or boundaries of the site(s). Provide a legal
description, site plan, vicinity map, and topographic map, if reasonably available.
--ire roadway improvements are located in quarter sections SW -10, SE -10, NE-
15, and NW -14 of Township 23N Range 4E. The Interurban Avenue South
improvements start approximately 640 feet north of the 42nd Avenue South
intersection and terminate at the 52nd Avenue South intersection. The South
133rd Street improvements begin approximately 450 feet west of the South
134th Place intersection and continue to Interurban Avenue South.
The roadway improvements are located in quarter sections SW -10, SE -10, NE-
15, and NW -14 of Township 23N, Range 4E. The Interurban Avenue South
improvements start approximately 640 feet north of the 42nd Avenue South
intersection and terminate at the 52nd Avenue South intersection. The South
133rd Street improvements begin approximately 450 feet west of the South 134th
Place intersection and continue to Interurban Avenue South.
The drainage improvement project area is located in Section 10 and 15 of
Township 23, Range 4. It commences near the intersection of South 133rd and
South 134th Street. The pipeline follows South 133rd Street to Interurban Avenue
South where it turns and parallels Interurban Avenue South. Interurban is
paralleled until about 60 feet east of the existing wooden bridge near the Tukwila
Commerce Park. At this point, the pipeline angles north and discharges into the
existing channel just downstream of the improvements proposed for the
Interurban widening project.
B. ENVIRONMENTAL ELEMENTS
1. Earth
a. General description of the site (circle one): Flat, rolling, hilly, steep slopes,
mountainous.
b. What is the steepest slope on the site (approximate percent slope)?
Fifty percent slope for roadway embankment slopes into existing ditch and
existing freeway embankment slopes behind proposed improvements.
c. What general types of soils are found on the site (for example, clay, sand,
gravel, peat, muck)? If you know the classification of agricultural soils,
specify them and note any prime farmland.
The soils along the roadway improvement alignment generally consist of 3 to
26 feet of silty and gravelly sand fill underlain by 2 to 15 feet of silts. These
soils are in turn underlain by sandy soils and soft rock to the greatest depth
previously explored, about 101 feet.
87039 -20 / Env CAecklistAnterurban Ave S (4.1 -91) 4
The drainage improvements will encounter gravelly sandy loam fill material
degrading to peat or muck in the existing channel corridor and below the
existing fill material.
d. Are there surface indications or history of unstable soils in the immediate
vicinity? If so, describe.
No indications of unstable conditions are evident.
e. Describe the purpose, type, and approximate quantities of any filling or
grading proposed. Indicate source of fill.
Minor regrading of localized uneven grades on the existing roadway will be
done. Existing grades in planned new pavement areas are generally close to
the planned final grade. Fill placement will be required within the sidewalk
and strip planter areas and for the wooden bridge removal and replacement
with a pipe arch culvert. Approximately 18,500 cubic yards of fill will be
placed.
No filling is anticipated for the construction of the pipeline.
f. Could erosion occur as a result of clearing, construction, or use? If so,
generally describe.
An increase in wind and water erosion of site soils can be expected during
construction as the roadway is widened, fills are placed, and planters and
sidewalks are constructed. The increase will be temporary until construction
is complete.
There is erosion potential during the construction in the open channel reach
prior to the establishment of the vegetation.
About what percent of the site will be covered with impervious surfaces after
project construction (for example, asphalt or buildings)?
Approximately 65 percent of the proposed roadway right -of -way is currently
covered with impervious surfaces. With the widening and addition of
sidewalk and planter strip, the impervious area will be increased to
approximately 86 percent of proposed right -of -way. Approximately 1,000
linear feet of asphalt lined ditch will be removed and replaced with a grass -
lined swale.
There will be no net increase in impervious surfaces by construction of the
drainage improvements.
h. Proposed measures to reduce or control erosion, or other impacts to the
earth, if any:
Groundcover will be established as part of the contract. The contractor will
be required to take measures which will mitigate impacts of erosion during
and after construction until vegetation is established.
Construction of drainage improvements is to be performed during dry, low
flow periods followed by immediate re- vegetation.
g-
87039 -20 / Env ChecklislMterurban Ave S (4 -1.91) 5
2. Air
a. What types of emissions to the air would result from the proposal (i.e., dust,
automobile, odors, industrial wood smoke) during construction and when the
project is completed? if any, generally describe and give approximate
quantities if known.
Dust and particulates from construction equipment will be generated during
construction (short term). Objectionable odors may occur as a result of
construction, but will cease upon completion of construction.
b. Are there any off -site sources of emissions or odor that may affect your
proposal? If so, generally describe.
No.
c. Proposed measures to reduce or control emissions or other impacts to air, if
any:
The contractor will be required to provide dust control measures such as
street cleaning and sweeping.
3. Water
a. Surface:
1) Is there any surface water body on or in the immediate vicinity of the site
(including year -round and seasonal streams, saltwater, lakes, ponds,
wetlands)? If yes, describe type and provide names. If appropriate,
state what stream or river it flows into.
Duwamish River at approximately 7.9 and 9.2 river miles upstream from
Puget Sound.
The outfall of the drainage pipeline drains to Southgate Creek which
drains to the Duwamish River.
2) Will the project require any work over, in, or adjacent to (within 200 feet)
the described waters? If yes, please describe and attach available plans.
Intersection, signalization, widening, curb and gutter, planting strip, and
sidewalk improvements will occur within 200 feet of the river at the 42nd
Avenue South and 52nd Avenue South intersections. The queue jumper
lane, curb and gutter, planter, sidewalk and bicycle path improvements
will be within 200 feet of the river within the section between 52nd Avenue
South and the 1 -5 on -ramp.
There will be no work within 200 feet of the Duwamish River for the
drainage improvement project. The pipeline outfalls into Southgate
Creek.
87039-20 / Env Checklist/Interurban Ave S (41 -91) 6
• •
3) Estimate the amount of fill and dredge material that would be placed in or
removed from surface water or wetlands and indicate the area of the site
that would be affected. Indicate the source of fill material.
There will be no fill or dredge activities in or on water bodies or wetlands.
4) Will the proposal require surface water withdrawals or diversions? Give
general description, purpose, and approximate quantities if known.
Roadway improvements will not.
Drainage improvements may require temporary flow diversion during'
construction of the outfall. Construction will be performed during summer
months when there is low flow.
5) Does the proposal lie within a 100 -year floodplain? If so, note location on
the site plan.
No.
6) Does the proposal involve any discharges of waste materials to surface
waters? If so, describe the type of waste and anticipated volume to
discharge.
No.
b. Ground:
1) Will groundwater be withdrawn, or will water be discharged to ground
water? Give general description, purpose, and approximate quantities if
known.
Temporary dewatering may be required during the construction of the
drainage pipeline.
2) Describe waste material that will be discharged into the ground from
septic tanks or other sources, if any (for example: domestic sewage;
industrial, containing the following chemicals; agricultural; etc.). Describe
the general size of the system, the number of such systems, the number
of houses to be served (if applicable), or the number of animals or
humans the system(s) are expected to serve.
Does not apply.
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.
Surface stormwater runoff from the roadway, planter strip, sidewalk, and
bicycle path will flow into new concrete curb and gutter to new catch
basins, inlets, and existing catch basins through new and existing storm
sewer systems to existing outfalls, a biofiltration swale that will replace the
87039 -20 / Env Checklist/Interurban Ave S (4-1-91) 7
bi
1
rs►"°
■4041
existing asphalt Tined ditch between SR 599 and Interurban Avenue South,
and a biofiltration swale south of South 133rd Street and opposite the SR
599 off-ramp.
Runoff in excess of the soil /surface absorption capacity originates from
about 550 acres of the Fostoria Basin. It follows natural and manmade
drainage courses to the eventual outfall into Southgate Creek and the
Duwamish River.
2) Could waste materials enter ground or surface waters? If so, generally
describe.
Pollutants associated with surface water runoff may enter surface waters.
Runoff will be introduced to biofiltration swales where practical prior to
entering systems which outfall into surface waters.
There is a potential that during construction of the pipeline outfall
excavation material may fall into the low flow surface waters.
d. Proposed measures to reduce or control surface, ground, and runoff water
impacts, if any:
Biofiltration swales will be used to treat approximately 65 percent of the
roadway runoff. Runoff from SR 599, which currently outfalls into storm
systems discharging into the river, will be introduced to the biofiltration swale
as is practical. Remaining runoff will utilize existing drainage systems.
Oil /water separators will be utilized in catch basins outfalling into biofiltration
swales or into an existing storm drain.
Runoff water diversion, when appropriate, will be provided during construction
of facilities.
4. Plants
a. Check or circle types of vegetation found on the site:
X deciduous tree; alder, maple, aspen, other: poplars.
X evergreen tree; fir, cedar, pine, other:
X shrubs scotchbroom
X grass
pasture
_ crop or grain
_ wet soil plants; cattail, buttercup, bullrush, skunk cabbage, other:
reed canaryorass
_ water plants: water lily, eelgrass, milfoil, other
other types of vegetation
b. What kind and amount of vegetation will be removed or altered?
Approximately 1.8 acres of grasses will be removed to construct widening,
curb and gutter, planter, sidewalk, and bicycle trail.
Grasses and native shrubs in the vicinity of the pipeline (the existing
87039.20 / Env CheckllstAnterurban Ave S (4-1-91) 8
Interurban Avenue South roadway shoulder area) construction will be
disrupted.
c. List threatened or endangered species known to be on or near the site.
None are known to occur at or near the site.
d. Proposed landscaping, use of native plants, or other measures to preserve
or enhance vegetation on the site, if any:
Street trees will be planted in the planter and on the west side of the roadway.
Embankment slopes will be seeded with native grasses and wild flowers to
enhance erosion control.
Erosion control in areas of disrupted vegetation will be provided during
construction. Since the pipe will lie below the roadway improvements, the
grasses will not be reseeded. The proposed pipeline outfall is planned to
include re- vegetation following construction.
5. Animals
a. Circle any bird or animal which have been observed on or near the site or
are known to be on or near the site:
Birds: hawk, heron, eagle, songbirds, other:
Mammals: deer, bear, elk, beaver, other:
Fish: bass, salmon, trout, herring, shellfish, other:
b. List any threatened or endangered species known to be on or near the site.
None are known to occur at or near the site.
c. Is the site part of a migration route? If so, explain.
Does not apply.
d. Proposed measures to preserve or enhance wildlife, if any:
As part of the roadway and drainage improvements, the existing channel
improvements downstream of the existing 66 -inch CMP culvert are proposed
to be constructed in such a manner as to encourage the establishment of a
fisheries in this stream reach. The pipeline outfall into the existing channel
will control erosion through riprap and through vegetation that will be
constructed with the pipeline.
87039-20 / Env Checklist/Interurban Ave S (4-1 -91) 9
6. Energy and Natural Resources
a. What kinds of energy (electric, natural gas, oil, wood stove, solar) will be
used to meet the completed project's energy needs? Describe whether it
will be used for heating, manufacturing, etc.
Electricity for the street illumination system and traffic signals at 42nd Avenue
South, South 133rd Street, northbound SR 599 off -ramp, and 48th Avenue
South /I -5 off-ramp intersections with Interurban Avenue South.
b. Would your project affect the potential use of solar energy by adjacent
properties? If so, generally describe.
No.
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:
Energy use will remain the same or be slightly higher for the proposal.
Signals at 42nd Avenue South, South 133rd Street and the 1 -5 off -ramp should
use the same amount of electricity as existing. New signals at the SR 599
off-ramp and 48th Avenue South intersections will use more electricity, but
should result in a reduction in gasoline use by increasing the efficiency of the
traffic corridor by reducing traffic delays, travel time, stop starts, etc. The
new illumination system which will provide better lighting of the roadway
should use slightly more electricity than the existing street lights, with an
increase in the number of street lights.
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.
Does not apply.
1) Describe special emergency services that might be required.
Does not apply.
2) Proposed measures to reduce or control environmental health hazards, if
any:
None are required.
b. Noise:
1) What types of noise exist in the area which may affect your project (for
example: traffic, equipment, operation, other)?
None.
87039 -20 / Env Checklist/Interurban Ave S (4.1 -91)
10
2) What types and levels of noise would be created by or associated with
the project on a short-term or a long -term basis (for example: traffic,
construction, operation, other)? Indicate what hours noise would come
from the site.
Noise typically associated with construction activity will be expected on a
short-term basis. Noise would be possible during construction working
hours, probably 7:00 a.m. to 10:00 p.m.
3) Proposed measures to reduce or control noise impacts, if any:
Noise levels will be controlled by Federal, State, and City regulations.
8. Land and Shoreline Use
a. What is the current use of the site and adjacent properties?
Urban arterial roadway and utility corridor with improvements being made
within public right -of -way, adjacent to commercial property, WSDOT right -of-
way, or Seattle City Light right -of -way.
b. Has the site been used for agriculture? If so, describe.
The site has not been used for agriculture.
c. Describe any structures on the site.
Timber bridge and four box girder overpass structures.
d. Will any structures be demolished? If so, what?
Yes, the timber bridge on Interurban will be removed and replaced by pipe
arch culvert.
e. What is the current zoning classification of the site?
City and WSDOT street right -of -way.
f. What is the current comprehensive plan designation of the site?
Principal arterial street (Interurban Avenue South) and collector street (South
133rd Street) right -of -way.
g. If applicable, what is the current shoreline master program designation of the
site? / J 4✓ �j
Does not apply. V
h. Has any part of the site been classified as an "environmentally sensitive"
area? If so, specify.
The Duwamish River shoreline that parallels the roadway at the north and
south ends of the project and the open channel reach from the outfall of the
existing 66 -inch CMP pipe to the Duwamish River has been so designated.
87039 -20 / Env Checklist/Interurban Ave S (4 -1 -91)
11
i. Approximately how many people would reside or work in the completed
project?
Does not apply.
j. Approximately how many people would the completed project displace?
Does not apply.
K. Proposed measures to avoid or reduce displacement impacts, if any:
Does not apply.
1. Proposed measures to ensure the proposal is compatible with existing and
projected land uses and plans, if any:
Project will not change land use, but improve roadway and enhance
pedestrian, bicycle, and transit transportation through the corridor.
Runoff values used in the pipe sizing storm drainage improvements were
determined from projected land uses in the tributary areas.
9. Housing
a. Approximately how many units would be provided, if any? Indicate whether
high, middle, or low income housing.
Does not apply.
b. Approximately how many units, if any, would be eliminated? Indicate whether
high, middle, or low income housing.
Does not apply.
c. Proposed measures to reduce or control housing impacts, if any:
Does not apply.
10. Aesthetics
a. What is the tallest height of any proposed structure(s), not including
antennas; what is the principal exterior building material(s) proposed:
Does not apply.
b. What views in the immediate vicinity would be altered or obstructed?
Does not apply.
87039-20 / Env Checklist /Interurban Ave S (4-1-91)
12
c. Proposed measures to reduce or control aesthetic impacts, if any:
Landscaping strip with shrubs and street trees on the east and street trees
on the west side of the street improvements should make the roadway more
aesthetically pleasing.
11. Light and Glare
a. What type of light or glare will the proposal produce? What time of day
would it mainly occur?
The existing illumination system will be replaced. The proposed system will
be designed to meet the Tight level and uniformity standards set for
completed roadway improvements to the south fronting the golf course.
b. Could light and glare from the finished project be a safety hazard or interfere
with views?
No. Illumination system will be designed to light improved roadway while not
impacting drivers on SR 599, 1 -5, or any other roadways in project vicinity.
c. What existing off -site sources of light or glare may affect your proposal?
None.
d. Proposed measures to reduce or control light and glare impacts, if any:
Illumination system will utilize lenses that will prevent glare to adjacent
roadway systems.
12. Recreation
a. What designated and informal recreational opportunities are in the immediate
vicinity?
Area northeast of the project paralleling the river is designated as a
bicycle /walking trail. From 56th Avenue South, a bicycle trail has been
installed along the golf course frontage.
b. Would the proposed project displace any existing recreational uses? If so,
describe.
No recreational uses would be displaced by the project.
c. Proposed measures to reduce or control impacts on recreation, including
recreation opportunities to be provided by the project or applicant, if any:
A bicycle path is proposed from 56th Avenue South to 48th Avenue South,
behind the sidewalk on the northeast side of Interurban to improve
recreational opportunities.
87039 -20 / Env Checklist/Interurban Ave S (4-1-91)
13
13. Historic and Cultural Preservation
a Are there any places or objects listed on, or proposed for, national, state, or
local preservation registers known to be on or next to the site? if so,
generally describe.
No historical or cultural resources are known to exist on or next to the site.
b. Generally describe any landmarks or evidence of historic, archaeological,
scientific, or cultural importance known to be on or next to the site.
Does not apply.
c. Proposed measures to reduce or control impacts, if any:
Does not apply.
14. Transportation
a. Identify public streets and highways serving the site, and describe proposed
access to the existing street system. Show on site plans, if any.
The major highways and streets in the vicinity of improvements include 1 -5,
SR 599, 42nd Avenue South, Gateway Drive North, 48th Avenue South, and
52nd Avenue South.
b. Is site currently served by public transit? if not, what is the approximate
distance to the nearest transit stop?
Metro transit currently utilizes Interurban Avenue South and South 133rd
Street for bus routes and training routes as well as access route to bus barn.
There are currently three transit stops in each direction on Interurban Avenue
South.
c. How many parking spaces would the completed project have? How many
would the project eliminate?
The project will eliminate six parking spaces in front of Suburban Gas. The
spaces can be replaced by relocating them behind the proposed sidewalk.
d. Will the proposal require any new roads or streets, or improvements to
existing roads or streets, not including driveways? If so, generally describe
(indicate whether public or private).
No. The proposal is for improvement of the existing roadway.
Installation of pipes will require roadway restoration and patching.
e. Will the project use (or occur in the immediate vicinity of) water, rail, or air
transportation? If so, generally describe.
Does not apply.
87039 -20 / Env Checklist/lnterurban Ave S (4-1-91)
14
f. How many vehicular trips per day would be generated by the completed
project? If known, indicate when peak volumes would occur.
g.
Does not apply.
Proposed measures to reduce or control transportation impacts, if any:
Roadway, pedestrian, and transit improvements will improve traffic flow
through the corridor, and reduce conflicts and accident severity.
15. Public Services
a. Would the project result in an increased need for public services (for
example: fire protection, police protection, health care, schools, other)? If
so, generally describe.
Traffic signal system, landscaping, roadway channelization, signing, and
storm water drainage systems require periodic maintenance by the Public
Works Department.
b. Proposed measures to reduce or control direct impacts on public services,
if any:
None are required.
16. Utilities
a. Circle utilities currently available at the site: electricity, water, refuse service,
telephone, sanitary sewer, other
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
immediate vicinity which might be needed.
Interurban Avenue South serves as a utility corridor as well as a
transportation corridor. Seattle City Light, U.S. West Communications, T.C.I.
Cablevision, Washington Natural Gas, Metro, and Val Vue Sewer District
have facilities within the roadway right -of -way. Coordination with the various
utility companies is occurring with preparation of the construction plans and
specifications. A few utility poles may have to be relocated. No significant
undergrounding of telephone and power lines will be necessary as most
overhead lines within the project limits are located on the east side of Seattle
City Light right -of -way away from the proposed improvements.
87039-20 / Env Checklist/Interurban Ave S (4-1-91)
15
• •
C. SIGNATURE
The above answers are true and complete to the best of my knowledge.
Signature:
City Engineer
Date Submitted:
87039 -20 / Env Checklist /Interurban Ave S (4.1.91)
16
D. SUPPLEMENTAL SHEET FOR NONPROJECT ACTIONS
1. How would the proposal be likely to increase discharge to water; emissions to
air; production, storage, or release of toxic or hazardous substances; or
production of noise?
The intent of the project is to correct areas which experience flooding during a
storm event. Incorporation of the recommended improvements will increase
storm runoff discharge rates within the capacity of the drainage system capacity
since this runoff water will not stand and flood low Tying areas.
Proposed measures to avoid or reduce such increases are:
The proposal provides for adequate storm conveyance in the downstream
drainage system to accommodate the increased flow rates.
2. How would the proposal be likely to affect plants, animals, fish, or marine life?
Vegetation may be disrupted during construction of improvements. The project
will enhance the fisheries potential by removing peak storm flows from the
existing creek that could otherwise cause erosion. The pipeline project is
coordinated with the Interurban widening project that promotes fish passability
into the existing culvert system.
Proposed measures to protect or conserve plants, animals, fish, or marine life
are:
Re- vegetation after outfall construction is completed. Drainage pipeline to
reduce erosion and scour potential.
3. How would the proposal be likely to deplete energy or natural resources?
Energy will be required during construction of facilities. The proposed
improvements should have the same or less needs as the existing facilities.
Proposed measures to protect or conserve energy and natural resources are:
None are required.
4. How would the proposal be likely to use or affect environmentally sensitive
areas or areas designated (or eligible or under study) for governmental
protection; such as parks, wilderness, wild and scenic rivers, threatened or
endangered species habitat, historic or cultural sites, wetlands, floodplains, or
prime farmlands?
A portion of the project involves work in the channel downstream of the existing
66 -inch CMP culvert to provide for better fish passage potential and to provide
for the future roadway widening.
Proposed measures to protect such resources or to avoid or reduce impacts re:
All work is to be performed during low flow periods followed by bank stabilization
including riprap protection for the drainage line outfall and re- vegetation (Willow
plantings) for stream shading and slope stability.
87039 -20 / Env Checklist/Interurban Ave S (4.1.91)
17
5. How would the proposal be likely to affect land and shoreline use, including
whether it would allow or encourage land or shoreline uses incompatible with
existing plans?
Roadway improvements will not affect shoreline use and will be compatible with
existing plans. Improvements will provide bicycle /pedestrian links to the trail
system proposed along the shoreline.
Drainage improvements may allow land which is currently flooded and subject to
erosion during significant storm events to become developed consistent with the
City's and private owner's plans.
Proposed measures to avoid or reduce shoreline and land use impacts are:
None are required.
How does the proposal conform to the Tukwila Shoreline Master Plan?
The roadway project will provide bicycle /pedestrian links to the shoreline trail
system proposed.
The drainage project corrects existing system deficiencies and does not
promote any change in land use other than what currently exists. There would
be no change from current outfall conditions and the project would thus conform
to the Shoreline Plan.
6. How would the proposal be likely to increase demands on transportation or
public services and utilities?
The drainage system will require periodic maintenance only.
Proposed measures to reduce or respond to such demand(s) are:
None are required.
7. Identify, if possible, whether the proposal may conflict with local, state, or
federal laws or requirements for the protection of the environment.
No known conflicts.
8. Does the proposal conflict with policies of the Tukwila Comprehensive Land Use
Policy Plan? If so, what policies of the Plan?
The project is consistent with this Plan.
Proposed measures to avoid or reduce the conflict(s) are:
None are required.
87039 -20 / Env Checklist /Interurban Ave S 0 -1.91)
18
•
•
•
E. SUPPLEMENTAL SHEET FOR ALL PROJECT AND NON PROJECT PROPOSALS
1. What are the objective(s) of the proposal?
To improve a major urban arterial and a minor arterial in Tukwila and
incorporate transportation, drainage, utility, aesthetic, and recreation
improvements into the project design. The roadways will be improved by
widening, overlaying, construction of concrete curb and gutter, storm drainage
system, sidewalk, bicycle path, planter strip with street trees and shrubs, utility
adjustments, street lighting, signalization and transit stops and pullout.
The drainage improvement project is to provide the City of Tukwila with
improvements in the Fostoria Basin through the construction of a new pipeline
recognizing anticipated future land use.
2. What are the alternative means of accomplishing these objectives?
Construct new roadway with the same amenities parallel to the existing roadway.
Design and construct improved drainage facilities on an incremental basis
following inadequate drainage conditions such as localized flooding or system
failure.
3. Please compare the alternative means and indicate the preferred course of
action:
Right -of -way costs, earth work, and new construction costs would be prohibitive
for alternative means making the proposed improvements the preferred course
of action.
The intent of the drainage improvement is to correct existing and future problem
areas before the occurrence of flooding or failures. Inadequate drainage areas
could thus be corrected to preclude these problems. The drainage improvement
is thus the preferred course of action.
4. Does the proposal conflict with policies of the Tukwila Comprehensive Land Use
Policy Plan? If so, what policies of the Plan?
The project is consistent with this Plan.
Proposed measures to avoid or reduce the conflict(s) are:
None are required.
87039 -20 / Env Checklist/Interurban Ave S (4-1 -91)
19
• •
INDEX Page
PROJECT VICINITY
Interurban Avenue South /South 133rd Street Improvements 1
Fostoria /Interurban Drainage Improvement 2
PLAN /PROFILE STREET IMPROVEMENTS 3 -14
PLAN /PROFILE FOSTORIA INTERURBAN DRAINAGE PIPELINE 15 -16
TYPICAL ROADWAY SECTIONS 17 -18
TYPICAL SECTION ADJACENT TO DITCH 19
97039.20 / Env Checklist/Interurban Ave S (4-1-91)
1 '
1
WALLACE
5 to'? 51
•
41 '1)1 .14
21 :11 2i 11:
CORI
ALLENTOWN
• BEGIN -NI
PROJEC.,
-• TUKWILA
•
■•
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PROJECT r
RIVER
.
TUKWILA
CITY OF TUKWILA, WA
INTERURBAN AVENUE SOUTH
42ND AVENUE SOUTH TO 52ND AVENUE SOUTH
SOUTH 134TH PLACE TO INTERURBAN
SOUTH 133RD STREET
ENTRANCO ENGINEERS. INC.
1 "
PROJECT VICINITY
ATTACHMENT A
TO:
FROM:
Cit %f Tukwila
PUBLIC WORKS DEPARTMENT
6300 Southcenter Boulevard
Tukwila, Washington 98188
(206) 433 -0179
Ross A. Eornst, P.E. Director
Ron Cameron
Phil Fraser
M E M O R A N D U M
DATE: July 5, 1990
SUBJECT: June 26, 1990 Meeting with Department of Fisheries
Public Works Department Staff, Consultants and Council members have
met with Department of Fisheries representative Joe Robel on June 27,
1990 in the conference room and the following people were in
attendance:
Ron Cameron
Phil Fraser
Brian Shelton
Steve Wagner
Phil Odegard
Ross Earnst
Doug Micheau
Wally Rants
Dennis Robertson
Allan Ekberg
Moira Bradshaw
Joe Robel
Tukwila Public Works
Tukwila Public Works
Tukwila Public Works
RCM, Inc.
Entranco Engineers
Tukwila Public Works
Tukwila Public Works
Councilman
Councilman
Councilman
Tukwila DCD
433 -0179
433 -0179
433 -0179
443 -5305
827 -1300
433 -0179
433 -0179
244 -0588
242 -6373
241 -6904
431 -3651
Department of Fisheries 753 -2980
The following information was provided by Ross Earnst: King County
maintains the dike system for the City of Tukwila. Also the City is
following the program of King County to provide storage in the river.
Joe Robel: Fish spawn in the winter time in the upper stream areas.
Fish can travel through culverts if the right conditions are
available for them to migrate. Some of conditions of adequate storm
migratory channels are as follows:
1. Maximum velocity depends on species but a rule of thumb is 4'
average per second; average flow for short sections of pipe can
go no faster than 8' - 10' per second.
2. The length of the culvert is not an viable criteria.
3. Fish ladders are acceptable with a minimum of 1' drop in 10'
horizontal, but preferred minimum is 1' drop in 20' horizontal.
4. Catch basin sumps have served as rest areas for some species of
fish.
5. Where stream beds are replaced with culverts, the pipe should
be oversized to allow rebuilding a stream bed wijhin the pipe,
and provided with check dams to reduce' flows. ( 4(y_./.19,„112.
6. Both water quality and quantity are necessary elements for
successful migratory streams along with providing a reliable
annual minimum flow.
7. Any system should have a stream bed.
8. Biofiltration systems located in community parks. Recreation
wetlands are necessary to provide appropriate cleanup of water
before recharged or discharged into stream systems.
9. Department of Fisheries encourages drainage systems recharged
to the underground aquafirs and biofiltration systems (i.e.
wetlands). The Department of Fisheries recognizes that
separating storm from surface drainage seems to dry up many
downstream creeks.
10. Providing a rate of flow which is 1/2 of the predeveloped rate
discharging downstream into the stream system is an appropriate,
minimum discharge for many retrofitted storm drainage systems.
11. Spawning and rearing areas need be provided as part of any stream
design depending on type of fish.
Joe Robel also provided the City with some water quality criteria
which is attached.
City Council members, City Staff, Consultants and Joe Robel met out
at 42nd Avenue South and Interurban Avenue to review the proposed
culvert connection for the Interurban Avenue pipeline. At that
meeting the following was suggested:
•
1. Proposed Storm System: Interurban Avenue South at South 48th
Avenue be put into a swale /biofiltration system..
2. 42nd Avenue South, a bottomless arch pipe with a wier and fish
ladders be provided.
3. The restructuring of
(discuss with WSDOT)
fish runs underneath
the pipe floor with the stream bed
may be an appropriate application to allow
West Valley Highway.
4. In the development area, cleaning out of the grass and providing
the defined storm route acceptable to development is appropriate
and could be done with volunteer labor.
It is agreed that the consultant should meet with Tom Lenz to review
proposals /suggestions involving WSDOT.
Attachment (1)
xc: Infrastructure File:
PF /amc:5:fish
M E M O R A N D U M
TO: Project file No. 84- RW41 -4
Interurban Ave. (42nd Ave. South to 52nd Ave. South)
FROM: Ron Cameron, City Engineer
SUBJECT: June 27, 1990 Fishery Meeting
Attendees:
Joe Robel, Department of Fisheries
Councilmembers Robertson, Rants, Ekberg
Steve May, Kramer, Chin and Mayo
Phil Odegaard, Entranco Engineers
Ross Earnst, Public Works Director
Ron Cameron, City Engineer
Brian Shelton, Transportation Engineer
Moira Bradshaw, Planner
Doug Micheau, P.W. Coordinator
1. Joe gave what conditions, items for creeks relative to permits
and for fish "class" and discussion. Further at his knowledge
of Southgate, Gilliam and Riverton Creeks and tributaries.
2. Particular detailed discussion of Interurban (42nd to 52nd)
project and Southgate Creek and tributaries. Routes, drainage
designs, WSDOT drainage, the project were all discussed in
detail relative to SAO.
3. Field review of Southgate Creek and pipes. Fish found.
4. Working lunch. Decision on pipe design by TC - what they'd
recommend to council. Per Joe, Steve, our design look at
alternatives and costs.
a :robel.mtg
WATER QUANTITY.
Increased run -off from development should be retained and
infiltrated to preserve base stream flows, and /or detained in a
manner to preserve the stream channels dominant discharge (Bates,
1983). For Soil Conservation Service (SCS) hydrologic soil
groups Type A and B (USDA, 1986) use of infiltration basins
should be considered. Site investigation and design criteria are
essential for successful performance of infiltration basins
(Ecology, 1990). Infiltration could significantly reduce the
volume required for detention. For detention basins, WDF
recommends the following criteria for protecting physical habitat
features in streams. Detention basin performance (Figure 1),
shall be such that discharge from the developed area meets the
following criteria:
1. Fifty percent of the pre - developed two -year peak
release rate for the two -year developed design storm..
Fifty percent of the two -year peak adjusts for the
extended duration of release which occurs as a result
of the increase in run -off volume from the developed
state (Powers, 1989).
2. The pre - developed 25 -year peak release rate for the 25-
year developed design storm.
Pre and post development run -off rates should be
determined by using a continuous simulation model such
as the U.S. EPA HSPF computer program. If such a
watershed model is not available, a rainfall event
simulation model can be used. Run -off should be
computed using a SCS -based hydrograph method, and the
rainfall event should be a Type 1A distribution with a
l
•
•
a
24 -hour duration (USDA, 1986). For purposes of
analysis the peak outflow from the detention basin
should occur within 30 hours from the start of the
design storm.
Figure 1 - Detention Basin Performance
For an appropriate level of protection from stream channel
erosion detention basin outflow rate and the time for which it
occurs must be analyzed. Since inflow and outflow are
independent, storage routing is required to perform this
analysis. A level pool routing technique is acceptable. A
suggested process is as follows 1) select trial detention basin
size, 2) determine stage- storage relationship, 3) select outlet
structure type and size, 4) determine stage- discharge
relationship, 5) route the developed inflow hydrograph through
the detention basin and 6) find whether the outflow meets the
established criteria. A variable two stage outlet structure will
be required to meet this performance.
WATER QUALITY
Pollutants in stormwater run -off should be treated using best
management practices for the protection of freshwater and marine
shore aquatic life. Treatment of stormwater run -off with awet
detention pond (Kulzer, 1989) and biofiltration channel (Horner,
1988) will provide acceptable water quality control. Where
possible, biolfiltration channels of any length should be used
for pre- treatment of stormwater run -off. To provide an
4
acceptable hydraulic residence time for treatment, the two -year
24 -hour storm should be detained and released at 100 percent of
the pre- existing peak. Use the methods in the water quantity
section for run -off calculation and detention basin sizing.
Sedimentation and erosion control practices should be included
into the design to prevent water quality features from becoming
contaminated. Also, regular maintenance is required to ensure
pollutant removal effectiveness. The following are acceptable
design standards for wet ponds and biofiltration channels.
Wet Ponds - A pool of water retained in a pond by placing
the outlet above the pond bottom.
1. Permanent pond surface area should equal 2 percent of
the catchment area for residential, and 3 percent for
commercial.
2. The permanent pond water depth should be 2 -3 feet.
3. Ponds shall have a minimum of two cells.
4. Short - circuiting should be minimized by a pond length -
to -width ratio greater than 3:1, use of baffles, etc.
5. Permanent wet pond volume should not be part of the
detention volume required.
Biofilters - A filter strip or swale used to treat
stormwater run -off by interaction with vegetation and soil
surfaces.
1. Avoid gravelly and coarse sandy soils in order to
maximize water contact with vegetation and the soil
surface. Sites with coarse soils are more appropriate
for infiltration areas.
2. Biofilters should be a minimum of 200 feet in length
when outletting from the project development.
3. The biofilter width should be designed based on a 2
year 24 -hour peak flow, and the following;
a. Velocities should be less than 1.5 fps. �.
b. The flow depth should be less than 4 inches.
c. Longitudinal slope should average 2 to 4 percent. ,D
For slopes greater than 4 percent rock or log
check dams should be installed every 50 feet.
4. Side slopes should be.no steeper than three
horizontal:one vertical.
•
i •
References
5
Department of Ecology. 1990. Stormwater Management Manual for the
Puget Sound Basin. Washington State Department of Ecology.
In preparation.
Bates, K. 1983.. Draft guidelines for policy development.
Stormwater management in urban areas. Washington Department
of Fisheries. Habitat Management Division. Unpublished.
Horner, Richard R. 1988. Biofiltration systems for storm run -off
water quality control. Prepared for Washington State
Department of Ecology and others.
Kulzer, Louise. 1989. Considerations for the use of wet ponds for
water quality enhancement. Office of Water Quality.
Municipality of Metropolitan Seattle.
Powers, P.D. 1989. Stormwater detention performance based on
dominant discharge. Draft. Washington State Department of
Fisheries. Habitat Management Division. Unpublished.
United States Department of Agriculture. 1986. Urban hydrology
for small watersheds. Soil Conservation Service.
Engineering Division. Technical Release 55.
84
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• • • • •
THIS DRAWING HAS SEEN REDUCED
APPROXIMATELY_ ONE—HALF SCALE
1APEIIMMO
•IIINGIN111•1111140.1•TRIMITS. WATIIIIR• PAINK 11111.11LOINO•
SOU TN /334OST
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= =1...
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106
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:1994
THIS
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DRAWI G. HAS EEN: REDUCE
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A1.11g1•TE weQMs SCAT.
•SNOM1e NWdS•KT9METK• WATU /1. SOW SOW AAAK /•SUILOINO•
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INTERURBAN AVENUE
STA.103 +50 TO STA.I08 +50
PLAN AND PROFILE
ENTRANCO ENGINEERS. INC
/w
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411
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in
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STA 109.62 36 INTERURBAN AVE. S.
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2074. .
THIS 'DRAWING HAS BEEN REDUCED
• APPROXIMATELY_ ONE -HALE _S.CALE.
•KNOINtKA /NO•STIMIKTO• WATK/1• /SWER•PAAKK•NUILOINO•
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• UNWNII laMAIO• STPICOTK• WAT•A• Oa W • A• PAPIK S. SUILOINO-
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I ; THIS DRAWING HAS BEEN REDUCED •
1 .. __ _ APPROXIMATELY ONE -HALF SCALE
INTERURBAN AVENUE
1 1
1 = 1
n
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r- CONC. RETA /NING WALL
li
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I ' STA.24•31.30 Dl UNE / INTERURBAN AVENUELSOUTH
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1
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1221-00 I 16.25
r
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10' J
I i 1 I
THIS DRAWING HAS BEEN REDUCED!
APPROXIMATELY ONE -HALF SCALE;
• 17.80
_ ....I _ . 124 +00 ...
INTERURBAN AVENUE
STA.I 18 +00 TO STA.I24 +00
PLAN AND PROFILE
•
MATCH LINE STA. 124 +00 - SEE FIGURE
•
■
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126 INTERURBAN AVENUE SOUTH 127
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STA.124 +00. TO STA.I29+00
PLAN AND PROFILE
v,
{
: -4
1
i 131 f00
L
THIS DRAWING HAS BEEN REDUCED:
APPROXIMATELY ONE -HALF SCALE__
151.11MI.tE weMMs BEM..
•INOINU■RINO•ATAUUTK• WATUN•.UW ER•PAIRKS• KUILOINO-
consu
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ar
141 Y•
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STA.I29 +00 TO STAJ3I+00
PLAN AND PROFILE
.1707! ..60
\MIII �•
1,I
H LINE StTA.24+
0 —SEE SHEET
PV,C. STA.24+00
EL 14.55 6
MATCH LINE STA, 24 +00 —SEE SHEET
2
?V.I. STA, 2
L. 13.66
///.
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END ROADWAY TAPER
MATCH LINE ETA.28 +5d—SEE S EET
1-1,‘ MATC LINE STA.28 +50 -SEE SHEET
ETTY TLaMWTLA
ELEVATIONS
1
4'
12.-40.35 1645' 572.96' 233.12'! 442.79
�` A E DATA T
PAVING
t UMITS
/P.T. STA, 22452.TI 469.01R1)
itt
7
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• -.• G•66.09.40'
R•35.03'
T • 32.73';
u
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•UNOINCERINO•t/T PAM TIR• WATUR•UUWUR•PAPIK /•SUILO /NO-
SOUTH 133 RO STREET - STA.21+00 TO STA.24+00
PLAN AND PROFILE
9L
REGRADE D/704 I307TOM
TO PROv/DE UNIFORM
SCOPE. ROX. /2-5'9
CNA, 'NK FENCE TYPE .r
SEE STO. PLAN 4-- 2.
ONP
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PLA ENT
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_ 18 "Ss
0
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•
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STORM DRAW
OOP
APPROXIMATE LOCATION OF 9!0 "O
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1"1
L
INTERURBAN AVENUE SOUTH
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(40' WIDE)
3 OvEREXC.AVAT/ON-
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MATER /A LS -SEE SPECS.
/O5'!
ScNEDULE 4
12'30
Ex/sr. L "cMP
EXIST B �C�►P
Ex /Jr_ GG'CMo
JUNCTION STRUCTURE
STA. 92+7S.S ZG_2'LT.
SEE SHEET S
SEE DETAIL S/8
SCHEDULE 3
NOTES:
I. CONTRACTOR SHALL. PROV IDE T.EMPORAR -K
DRAINAGE FROnt'TNE EX /STING OjTCN DURING
THE CONSTRUCTION OF L /NE A AND (min:
SUCH- T'ME-THAT- AU..F.LGw- FROM"TNE EXIST.
DITCH MAY- 86 -INrERCEPTEO -8Y THe NEW
DRAINAGE-SYSTEM
Z. UTILITY LOCATIONS ARE APPROXIMATE .
LOCA7 /ON OF UTILIT /ES TO 86 VERIFIED PRIOR,
TD CONSTRUCTION.
,SCHEDULE
48 -S0
30
zD
/s
/0
S
J
0
MI.SH RIVER
Cl-?ANNE L. I 1
h
REGRADING ti W h k or
{ O
RIP RAP— • i 2 W 9
PLA MENT 1 e 3 h . / .
3ACK- 'a UMITS —r--+.+ BACCF/CL UMR3 O
AQVER P /PE I. OVER. P /PE 1
(FUTURE) MRS.,PROjECD • Y 1r -
1 t::'::
1 S
„. 6,,4,..„....•:
'cMP..f
. . 1
x NVERT / 8Z
/NTERURBAN AVE.
SCALE:: •1 SO' HOR/L
t "=
S' VERT
3 OVEREXCAVAT/OAI
REPLACE wiTH TYPE A
MATERIAL- SEE JPEC•S.,
TOP OF OI TC.N.,
CQ6-YONO)
USE srrROFOAM
PAD FOR VO103
BETWEEN PIPES
1 EXIST. CHANNEL
1 BOTTOM �\
� S �
APP
/NV. -0.ZZ.
-5
--- ,fJfANNE SOTTO
FOLLOW /NG DITCH
:ZEGRAD/NG: AND
PLACE MENT T. OF
_ID RIP RAP
i
EN /STIN6 GRADE
L /MIT OF PIPE DEFLECT /ON
DEFLECT PIPE AS REQUIRED.
NOT TO EXCtEO 302
MMANUF4eTa+eE5 -REC2IM //0.47) ;s- --•
OR 0.55 DEGREES PER ./O /NT,
WHICHEVER 1.5 LESS _
0.70
SO CF 9G"
CLASS ZZ RCP
. - t9
LINE Al :
E.TS conaze7E —�
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t'
I.
'
•
/// dF _ loli~CLASS:ZQ. RCP
!0
USES.IYROFOAM PALLS
FOR YOIoS I3ETwEEN •
.P /PE:AND ENCASEMENT i
a8 LF �"kLAss zr RcP • e :
LINE' B :::.
APPROX.: ETS:
CENT '/./iNE;
/NV. V.82
/NV 3+Co0
O
93-i O0 ! 94:000-- 95400. 97 00 :. 98400 . 99+00..
100200
1O /#O0
In6016.7M weQms enmars
•ENGINEERINO.BTREETB• WATER• BEWER- PARKB•BIIILDINO•
- on-s -u
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1+17 re......
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/oz,00 /Ct34 00
;0/000 -10
FOSTORIA /INTERURBAN DRAINAGE PIPELINE
PLAN AND PROFILE
Ia lab revision
lib N
Nolo N0T
lab
• (11.1111:144
SCALE: 1'7= 50'
ONP
7CN
w
fol."RCP I
STORM �IN
/3Z" MANHOLE
18-SS
•2'W
SEE DETA /L 1/8
STA /07f45•S 34.o. LT.
FLOWL /NE INTERSECT/
Z4.- RCP
1
18 -RCP
4 "FM
PUMP STATION
ti
4 PVC DRAIN
'sO- �D//CN
- __ -
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tog CASING
0
EX41T.33" t
STL. Gismo
/z' w
ON P
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•
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E
1,4.44,177.S-
46
U
Ex/ST. JUNCT /O
80'c. SEE 0E7. 1/9
48 "s0
v
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%/HIT OF PIPE DE. 7. 6c77ON
3O ckJ -
ZS s
W
Ex4ST. GRADE
J5
!0_
110
STORM ORA /N
4.6
Ex/..s T_ /8'c/aP ro BE
ABANDONED AND
REMOVED
EX /5T. MANHOLE
STA 1111-31-S 40.o'LT.
N /80. 463.199
6/, 4. 44" 250.701
/ai0
INTERURBAN AVENUE SOUTH
Ex/S7. CATCH BASIN
LINE E.
/8" RCP
STA /07 •05.0 80.o' RT.
DIVERS/ON STRUCTURE
-SEE SHEET 4-
SCHEDULE
APPROK /MATE LOCAT /ON of 340 "(2!
EFFLUENT TRANSFER SYSTEm (FM)
W
1 4
W T ;
i W ! 't i ex/ST/MG
Z GRA D6j
/N /,NUM
to
SCHEDULE 1
INTERURBAN
AVE. .50.
aV
k
OO kl
M 2
W
; y:
NOTE
UTILITY LOCATIONS ARE APPROXIMATE'.
LOCAT /ON OF UT /L /TIES TO BE VERIFIED
PR /OR TO CONSTRUCT /ON.
SCHEDULE
SCALE: /°-= SO' /-loRIZ_.
1 "- S' vERT.
30
•
1 EX /3T..j
' 1 [' /8 "SO::
L
1
CX/ST.
I B wG EML P A T Ot
I
NECESS ARt .4NO I
G66 0 f
315 L F !o(o"CLASS .IY RCP
S =O.00 /Co
/NY. 3.4,0
INV. 4.10 our
ABANDONED foti C.T. •
SANITARY .SEWER FORCE I
MA /N /N LO"-STEEL CAS /NG.
Rf�1OYE AS REqu/REO_ j
379 (..F
ar; a. siZ P -5.,t0.00- 0.00-
1►
!N✓ /0.011'
EK/ST_ !8 CMP Jb BE
A$ANOONED (REMOVED
INV. 7.21
4 1 INV. 7.14
1
IN v. ? :OS
INV-9.5S"
INV. 4.ZOt /N
I i
/NV. 4.Z0 i.
10IotOO 1 10Z400 •
coa4oa. Kaftan
O3 "LF OF /8
CLASS 17 RCP
E •O:OOJO
APPROX. ETS CROSSING
•
tL/�D1
uthan
IAN. 4.40
•
1.D9`FoFGG��
CLASS 1St RCP
.S c 0.0018
ALINE C .
15161s67e warms ,esA■r.
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o.•.. Ow • r2/> ..
mr ww Alor'-
Ins. rr.va. WNW
i
.F(/TURE 4k8' /,i/1/. 7.07
SOX CULVERT
,%NV. S.90
NOTE 1 I I
BOX iCUCVERT! TO BE DES /GNED i :
EXLST_ /8"CMP 70
DYED AS
N6CESSARN ANO t
PLUGGED
EX /STYNETh
48^ RCP' c-
ExIST/NG' .7W /N
r4"/MPI t 1
L
Our
INV. /O.Z7
FUTURE
BOX CHANNEL
ExAsx' /B cMP •
;O 8E REMOVED t
AS NECELss4' Y
AND PLUGGED •
zs
1
i
/0I
INV. /0.57 •
/NY- 7 Z/
7. /0! /N
BASED ON SPEC /FIUT /0MS RJR; 1 COCA s P1
REINFORCED CcNCRETE 80X 1 1 e S�o.00 .5i
SECTION LEOR SLaR^2A.49/Iti�
-A3TM C-Bsoi•-WITH LESS • LINE D
THAN .TWO FEET OF COVER.
SUBJECTED 70 NI6HWAY LGA0 -j
/N6S.
FOSTORIA / INTERURBAN DRAINAGE PIPELINE
PLAN AND PROFILE
38 L F OF /8"
CLASS;. RCP:
L,52 S = 0.007.9
- LINE E
1
1
1
1
1
1
1
1
I � j
w
Sato
rl11siats
e
P+.
EXISTING PAVEMENT
12" CONCRETE STORM PIPE
EXISTING PROPOSED
66" CL IV RCP
96" ETS�
i
i
CATCH BASIN TYPE 1
■
TYPICAL SECTION ADJACENT TO DITCH
ENTRANCO ENGINEERS. INC.
CITY Or TUKWILA. WASHINGTON
INTERURBAN AVENUE
Figure 19
*
eh
•
•
•
LOCATION MAP
INTERURBAN DRAINAGE IMPROVEMENT
FOSTORIA / 2
-SEE. SHEET
• FOR' GRINDING
•
END SHOULDER
CURB RETURN ELEVATIONS
PC. 11 +40.67 (14.15 'FIT.) 25.89
V4 25.91
1/2 25.85
3/4 25.79
P.T. 89+55.74 (30.50'Lt) 25.74
.6. 35.00'0
R • 75.00'.
�9✓.T • 23.65'
- 4 -__' •
STA.89 +32.46 INTERURBAN AVE. S. •
STA.10+94.62 42ND - AVE. S.
3N..R. 4E., W
SEE SHEET I5. NOTE
STA: 0+80
GE 25.6*
P.C. STA. 88 +86.96_(18,0
67
STA.89 +15(36'RT
1E 25.1*
- BEGIN. SHOULDER
STA.10 +73 (30' LT.)
STA. 93 +752
STA.91 +66* (38'RT.)
STA. 92+104s
BEGIN SHOULDER TAPER
STA. 9 +75 (30' LT.)
26.68
90 +51.32 (29.60'Rt) 26.31 - - - - - - --
----------------- _
6•'128 °46'33•, - - -
SR 599 NORTHBOUND
R•35.00'
T • 73.01'
L • 78:66'
300' V.0
N.G.VD. of :1929
20' .10'-
T.O.C. - RT.
T.o.C. LT..
Ft: PROFILE
25 58
25 94
25.35.:
25.51::
:::25
25
• 24 8C'
. 24 59
24 25 ..
924i
24.37 •
24.35
24.51
• 24.
24
24
09
25
•ENOINEERINO•BTREETB •WATER•BEWER•PARKB•BUILDINO•
IOSISIOOS
APPWoxIMATg LIMIT OF CONSTRUCTION DtSTURE'ANCE
T?� RECEIVE ER:39IOH CONTKOL GRASSES,
'TA78 + :c- IW Tn Un^6A_ll AVE S
S7A.10t85. o2 4 •ND AVE S.
�'. l
takilaki,ae 41414. ,.li�� - :•.'awe. _ AVM ���:_.y:_.:•_
.;Vo.64.A ' • -
•
p•TPROm'Ipc'Tt. LIMI %OF CONSTRLGTIOH PIsru
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e. sTA. s +a�.yeLs.a RrL ,
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Hough Beck & Baird Inc.
landscape Architecture & Planning -- –
1000 Lenora Street. Suite 516
Seattle, Washington 98121 (206) 682 -3051
• ENOINEERINO•BTREETB •WATER•BEWER•PARKB•BUILOINO•
L9 AA 07039 -60_
wale 1` =2o' •
date
APPROXIMATE LIMIT OF Cot -i r ucTION DISTURBANCE
W RE!GE E. • EROSION CAFITROL GRASSES, WP.
lJOIB5:
I, t�°IbTIN6� ASPItALT iwzriq.IT P7 BE ' t.44t.Lit
E F}110JED.0LL AhpHA..T 4 ExLs45 MATERIAL
-swki 1. EE ttEYIDJE t DI°'Ft75EP OP OPFSITE
III. Pc[AI E WI Comat na.i -r RF1tuIREM $l155.
1-. FLUB RA411N61 'W EE . PER
1
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S48 °1328 E
• n f°IEDI PL'Agrflt
jI INTERURBAN AVENUE SOUTH_•
126 I I
1.4.o(1_ TR-4FRL' cuRBazer -aOID i94411dE 41- 114444
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•
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S 48°.13'02"E.
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l ll4 =L� II IE'=_iuIi° eUirl
In11131-==-1111111
Lrid
1.1 DT11 WR1E5
SEE P•At4b
�— fIsTIN(�'fKPHALT TD ix Arun
PLANT SCHEDULE
. BOTANICAL NAIIEICOLO.ON NAME
TRFES
010 I••
'iFRINr.�E Rir�
PRUNUS SERRULATA •KWANZAM7
KWANZAN CHERRY •
OUERCUS RUBRAI
RED OAK
•SHRIIRS
PRUNUS LAUROCERASUS..
• OTTO LUYKINT
OTTO LUYKEN LAUREL
. 1B' Hr.; CONTIB&B; 2r O.C. ; FILL 6 WELL BRANCHED :.'.
• TRIANGULAR SPACING: FULL 8 WELL
o S48 °1302 E'
ABBREVIATIONS.
a AND
AT
B&B- BALLED AND BURLAPPED
CONC. CONCRETE
DIA DIAMETER
GALV. GALVANIZED
GA. GAUGE
HT. HEIGHT . .
- - MIN. MINIMUM
O.C. ON CENTER
SPECS SPECIFICATIONS
TYP. '. TYPICAL
W/. . WITH
GAL. GIPLLON
ONT. . CONTAINE -
Vr (4 cLEAN WASHED ROCK. •G r I76PT•
. SEE SPECIFICATIONS. .
le-I90 HL; 14.4.- cAJT.• Ft ...44i Q 5'-o° Q6:
TF� N� I <'PAGNF�. i'iri4er PLaNfT hHR4Pt°
IMTO RO'rRAPPFA EPA1LW; Rag IOGATW6
A,7 To
FIT 11a411Htl•
LEGEND
• Luminare on Light Standard
k\-.\\\ Building Boundary '-
F— Limit of Fill
—C— Umit of Cut
Top of Drainage Swale
— — Retaining Wall
Detail Identification
Drawing Identification
-1'1Oi WERE aUANTITIFh 1Jc'r HO J N THE ?LAW E'
-1316 cotJTR447OR s+04.1.- te F. �ETERMINII j
pt.r°.t4r -rn,(vNTITIES 'Ta'bE .
PCOT I iu THH EE pi)
ROM EM4E W CUM of
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0ARRERZErr (1.4 EMT
THAN DIA. OP 151-.1111Mh6AL,
ROOT BALL . 17P Of ReDIAroROIL
TREE AND SHRUB PLANTING DETAIL
NO SCALE .
Hough Beck & Baird/Seattle'
Landscape Architecture Planning Urban Design
1000 Lenora Street, Suite 516
. Seattle, Washington 98121 (206) 682 -3051
I. •
:111APTIIMMg BMW".
•ENGINEERINO•BTREETB• WATER•BEWER•PARKB•BUILDINO•
FL6 I'ISAI
cons -u
INTERURBAN AVENUE
091 Ao%
•2411. BIP
COMER R.
CERTWCREtG.3t8 '.
_LANDSCAPING PLAN
revisions
I 10 87039 -60
scale I °° 20'
dal.
1$- 114"
12 9RAce. 4' -O• a 4B'-O"
IpLo"
. fEIGE OF SIDEWALK . • 5 4t,
FRONT race OF WALL (VERTICA .) h EJ r
s. ACC FACE OF WALL' CO -OP OF. WALL- (HOP.g UNe)
VT... 42 +ll•OO
(31.0' LT..
WOEK PONT 1=1"
.4CK FACE OF WALL.
TOP OF. WALL
CURB*ELMER •
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PILE REINFORCEMENT DETAIL
4 . FOR REFER ONLY
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ENOINEERINO•BTREETB• WATER•BEWER•PARKB•BUILDINO•
ENTRANCO.ENGINEERS, INC.
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' SCALE :1'- '1� -O'
MIN.,
1
SECTION F -F
SACK RIPRAP PLACEMENT
N'TS
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STRUGT. ft• APLH
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SECTION B -B
SCALE, %2'- 1• -O "-"
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ELEVATION - STRUCTURAL PLATE ARCH a WEIR
SECTION E -E
SCALE %4' -i - O'.
TYP WEIR CORNER DETAIL
N'T5
SECTION D -D
SLALE %4 " -1• -O'
SECTION C -C
SCALE: l/4'- .1•-O"
OR REFERENCE 0
JUL 2,9 sgt
• ENGINEERING- STREETS. WATER.BEWER•PARKB•BUILOINO. -
MEC' date
j ara�®
Poi leg IEEE
frd dr 1111111
field hero
INTERURBAN AVENUE
RETAINING WALL W -2
revisions
38 J
46
1111 DA 87039 -20
seals AS SHOWN
date
2 CGIC i�, rct .
cousT.. J'7.
SECTION 'A -A
ELEVATION.
7-'d'4! 40� olz" TOP IH0770M'
7/ 4� CMG°
4 4a @12°
CANTILEVER: SIDEWALK DETAIL
4/,6: 44 °-.1.- 0°
•ENGINEERINO•BTREETB• WATER•BEWER•PARKB•BUILOING.
des led
draw
RETAINING WALL W-2
revisions
39
46
fil 90 87039 -20 '.
scab a
date
•
e
R/W VARIES 60' TO 75'
6 5'
SIDEW_
R/W
12 12 6.5 5.5'
P
2ASPHALT CONCRETE
PAVEMENT CLASS 8
6-ASPHALT TREATED BASE
6 5'
SIDEWALK
12
EXISTING _PAVEMENT
VARIES
SEE PLANS
12
0.5.")
ROADWAY SECTION A
APPROX. STA.92 +50 TO STA.103 +95
STA 111 +50 TO STA 118+00
R/W VARIES 60 TO 75'
2-MINIMUM ASPHALT
CONCRETE PAVEMENT
CLASS 8
2.
12.
2ASPHALT CONCRETE
PAVEMENT CLASS 8
6-ASPHALT TREATED BASE
g.
R/W
12.5' 11.5'
12•
12
12'
0.5*
EXISTING PAVEMENT
VARIES
SEE PLANS
ROADWAY SECTION B
APPROX. STA.105 +55 TO STA. 108 +75
N.T.S
ENTRANCO ENGINEERS. INC.
CITY OF TUKWIIti WASHINGTON
2 MINIMUM ASPHALT
CONCRETE PAVEMENT
CLASS 8
•
INTERURBAN AVENUE
*6 FOOT SIDEWALK TO BE
CONSTRUCTED FROM APPROX.
SOUTH 133RD STA 27 +70 (RT) TO
INTERURBAN AVE. STA 106175 (RT)
17
TYPICAL ROADWAY
SECTIONS
e
MAX.
13' 1 51
10'
=27.5
2 ASPHALT CONCRETE
PAVEMENT CLASS 8
MINIMUM OVERLAY
ROADWAY
/
=275• I I //
11• - 11' I I /
Ii
T
EXISTING PAVEMENT_ _ _ _ J
ROADWAY SECTION C
APPROX. STA.120 +50 TO STA.122 +50
N.T.S.
I -5 OVERCROSSING
R/w VARIES 70 TO 106•
VARIES 13' TO 17'
12
I1• VARIES 0'7010'
0.5
8•
2%
VARIES
EXIST MGLAVEMEN
VARIES
- in /v//
2 ASPHALT CONCRETE
PAVEMENT .CLASS B
6 ASPHALT TREATED BASE
ROADWAY SECTION D
APPROX. STA.125 *60 TO STA.I30 +O0
N.T.S.
2 MINIMUM ASPHALT
CONCRETE PAVEMENT
CLASS 8
J
• ENTRANCO ENGINEERS. INC.
'CITY Of TUKWILA. WASHINGTON
INTERURBAN AVENUE
18
TYPICAL ROADWAY
SECTIONS