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MAPTE WOOD CREEK SEDIMENTATION BASIN
RECONSTRUCTION AND IMPROVEMENT PROJECT
DRAWING DESCRIPTION
LOCATION MAP AND DRAWING INDEX
SITE PLAN
UPPER CHANNEL REGRADING
STANDARD DETAILS AND NOTES
BASIN PLAN, SECTIONS AND DETAILS
SPILLWAY PLAN AND SECTIONS
SPILLWAY SECTIONS AND DETAILS
FISHWAY PLAN, SECTIONS AND DETAILS
MISCELLANEOUS SECTIONS AND DETAILS
EROSION CONTROL PLAN
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PROJECT SITE
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MAPLEWOOD
GOLF COURSE
0 .25 .5 1
SCALE IN MILES
VICINITY MAP
SW 1/4 SECTION 15 TOWNSHIP 23N RANGE 5 E
SE 1/4 SECTION 16
NE 1/4 SECTION 21
NW 1/4 SECTION 22
CITY OF RENTON STORM WATER DRAINAGE NOTES
(THE FOLLOWING NOTES ARE REQUIRED BY THE CITY OF RENTON TO APPEAR
ON THESE PLANS. SOME NOTES MAY "lui APPLY TO THIS PROJECT.)
1. BEFORE ANY CONSTRUCTION OR DEVELOPMENT ACTIVITY OCCURS, A PRE — CONSTRUCTION MEETTNu MUST
BE HELD WITH THE CITY OF RENTON DEVELOPMENT SERVICES DIVISION, PLAN REVIEW PROJECT MANAGER.
2. ALL CONSTRUCTION SHALL BE IN ACCORDANCE WITH THE LATEST EDITION OF THE "STANDARD
SPECIFICATIONS FOR ROAD, BRIDGE AND MUNICIPAL CONSTRUCTION" PREPARED BY W.S.D.O.T.,
AND THE AMERICAN PUBLIC WORKS ASSOCIATION (APWA), AS AMENDED BY THE CITY OF RENTON.
3. THE STORM DRAINAGE SYSTEM SHALL BE CONSTRUCTED ACCORDING TO THE APPROVED PLANS WHICH
ARE ON FILE WITH THE CITY OF RENTON. ANY DEVIATION FROM THE APPROVED PLANS WILL REQUIRE
WRITTEN APPROVAL FROM THE CITY OF RENTON DEVELOPMENT SERVICES DIVISION.
4. A DOPY OF THESE APPROVED PLANS MUST BE ON THE JOB SITE WHENEVER CONSTRUCTION IS IN PROGRESS.
5. DATUM SHALL BE U.S.G.S. UNLESS OTHERWISE APPROVED BY CITY OF RENTON. REFERENCE BENCHMARK
AND ELEVATION ARE NOTED ON THE PLANS
6. ALL SEDIMENTATION/EROSION FACILITIES MUST BE IN OPERATION PRIOR TO CLEARING AND BUILDING
CONSTRUCTION, AND THEY MUST BE SATISFACTORILY MAINTAINED UNTIL CONSTRUCTION IS COMPLETED
AND THE POTENTIAL FOR ON —SITE EROSION HAS PASSED.
7. ALL RETENTION /DETENTION FACILITIES MUST BE INSTALLED AND IN OPERATION PRIOR TO OR IN
CONJUNCTION WITH ALL CONSTRUCTION ACTIVITY UNLESS OTHERWISE APPROVED by THE DEVELOPMENT
SERVICES DIVISION.
8. GRASS SEED MAY BE APPLIED BY HYDROSEEDING. THE GRASS SEED MIXTURE, OTHER THAN CITY OF
RENTON APPROVED STANDARD MIXES, SHALL BE SUBMITTED BY A LANDSCAPE ARCHITECT AND APPROVED
BY THE DEVELOPMENT SERVICES DIVISION.
9. ALL PIPE AND APPURTENANCES SHALL BE LAID ON A PROPERLY PREPARED FOUNDATION IN ACCORDANCE
WITH SECTION 7- 02.3(1) OF THE CURRENT STATE OF WASHINGTON STANDARD SPECIFICATION FOR ROAD
AND BRIDGE CONSTRUCTION. THIS SHALL INCLUDE NECESSARY LEVELING OF THE TRENCH BOTTOM OR
THE TOP OF THE FOUNDATION MATERIAL AS WELL AS PLAGEMENT AND COMPACTION OF REQUIRED BEDDING
MATERIAL TO UNIFORM GRADE SO THAT THE ENTIRE LENGTH OF THE PIPE WILL BE SUPPORTED ON A
UNIFORMLY DENSE UNYIELDING BASE. ALL PIPE BEDDING SHALL BE APWA CLASS "C', WITH THE
EXCEPTION OF PVC PIPE. ALL TRENCH BACKFILL SHALL BE COMPACTED TO MINIMUM 95% FOR PAVEMENT
AND STRUCTURAL FILL AND 9O% OTHERWISE PER ASTM D- 1557 -70. PEA GRAVEL BEDDING SHALL BE
6" OVER AND UNDER PVC PIPE.
10. GALVANIZED STEEL PIPE AND ALUMINIZED STEEL PIPE FOR ALL DRAINAGE FACILITIES SHALL HAVE
ASPHALT TREATMENT #1 OR BETTER INSIDE AND OUTSIDE.
11. STRUCTURES SHALL NOT BE PERMITTED WITHIN 10 FEET OF THE SPRING LINE OF ANY DRAINAGE PIPE,
OR 15 FEET FROM THE TOP OF ANY CHANNEL BANK.
12. OPEN CUT ROAD CROSSINGS THROUGH EXISTING PUBLIC RIGHT —OF —WAY WILL NOT BE ALLOWED UNLESS
SPECIFICALLY APPROVED BY CITY OF RENTON.
13. ROCK FOR EROSION PROTECTION OF ROADSIDE DITCHES, WHERE REQUIRED, SHALL BE OF SOUND QUARRY
ROCK PLACED TO A DEPTH OF 1 FOOT AND MUST MEET THE FOLLOWING SPECIFICATION: 4 "- 8`/40 % -70%
PASSING; 2 " -4" ROCK /30% -40% PASSING; AND t2" ROCK /10 %20% PASSING.
14. THE CONTRACTOR SHALL BE RESPONSIBLE FOR PROVIDING ADEQUATE SAFEGUARD, SAFETY DEVICES,
PROTECTIVE EQUIPMENT, FLAGGERS, AND ANY OTHER NEEDED ACTIONS TO PROTECT THE LIFE, HEALTH,
AND SAFETY OF THE PUBLIC, AND TO PROTECT PROPERTY IN CONNECTION WITH THE PERFORMANCE OF
WORK COVERED BY THE CONTRACT. ANY WORK WITHIN THE TRAVELED RIGHT —OF —WAY THAT MAY
INTERRUPT NORMAL TRAFFIC FLOW SHALL REQUIRE AN APPROVED TRAFFIC CONTROL PLAN BY THE
TRANSPORTATION DIVISION. ALL SECTIONS OF THE W.S.D.O.T. STANDARD SPECIFICATION 1- 07 -23,
TRAFFIC CONTROL, SHALL APPLY.
15. SPECIAL DRAINAGE MEASURES WILL BE REQUIRED IF THE PROJECT LOCATION IS WITHIN THE AQUIFER
PROTECTION AREA.
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NORTHWEST, INC.
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CITY OF RENTON
Engineers and Scientists
Bellevue, Washington
2353 -1307H AVE NE, SUITE 200
.0 25792
DEPARTMENT OF PUBLIC WORKS
BELLEVUE. WASHINGTON 98005
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MAPLEWOOD CREEK SEDIMENTATION BASIN
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RECONSTRUCTION AND IMPROVEMENT PROJECT
EXPIRES 12 -21 -97
LOCATION MAP AND DRAWING INDEX
DESIGNED: R.S.P. HNW
DRAWN; C.L.C. HNW
CHECKED: D.E.P. HNW
DATE: 7 -15 -96
FILE NAME: SHEETI
SCALE: AS NOTED
FlEIO PAGE:
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AS - gDi LT NOTES ADDED
DWN
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NO.
REVISION
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BY
PPROX
ATE
APPROVED;
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