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CITY OF RENTON
STORMWATER DRAINAGE NOTES
1. BEFORE ANY CONSTRUCTION OR DEVELOPMENT ACTIVITY OCCURS, A PRECONSTRUCTION MEETING MUST BE
HELD WITH THE CITY OF RENTON DEPARTMENT OF PUBLIC WORKS, DESIGN ENGINEER.
2. ALL CONSTRUCTION SHALL BE IN ACCORDANCE WITH THE "1988 STANDARD SPECIFICATIONS FOR ROAD, BRIDGE
AND MUNICIPAL CONSTRUCTION" PREPARED BY WSDOT AND THE AMERICAN PUBLIC WORKS ASSOCIATIONS
(APWA), AS AMENDED BY THE CITY OF RENTON DEPARTMENT OF PUBLIC WORKS.
3. THE STORM DRAINAGE SYSTEM SHALL BE CONSTRUCTED ACCORDING TO THE APPROVED PLANS WHICH ARE
ON FILE IN THE DEPARTMENT OF PUBLIC WORKS. ANY DEVIATION FROM THE APPROVED PLANS WILL REQUIRE
WRITTEN APPROVAL FROM THE CITY OF RENTON DEPARTMENT OF PUBLIC WORKS, DESIGN ENGINEER OR
STORM WATER UTILITY.
4. A COPY 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 DEPARTMENT OF PUBLIC WORKS.
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 DEPARTMENT OF PUBLIC WORKS,
STORM WATER UTILITY.
P E IN . THE GRASS 8. GRASS SEED MAY BE APPLIED BY HYDROS ED SEED MIXTURE G
r OTHER THAN CITY OF RENTON
APPROVED STANDARD MIXES, SHALL BE SUBMITTED BY A LANDSCAPE ARCHITECT AND APPROVED BY THE
DEPARTMENT OF PUBLIC WORKS, STORM WATER UTILITY.
9. ALL PIPE AND APPURTENANCES SHALL BE LAID ON A PROPERLY PREPARE FOUNDATION IN ACCORDANCE WITH
SECTION 7-02.3(1) OF THE CURRENT STATE OF WASHINGTON STANDARD SPECIFICATION FOR ROAD AND BRIDGE
CONSTRUCTION. TI N. THIS SHALL INCLUDE NECESSARY LEVELING OF THE TRENCH BOTTOM OR THE TOP OF THE
AL NCLU
FOUNDATION MATERIAL AS WELL AS PLACEMENT 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 PERCENT FOR PAVEMENT AND STRUCTURAL FILL
AND 90 PERCENT OTHERWISE PER ASTM D-1557-70. PEA GRAVEL BEDDING SHALL BE 6 INCHES AND OVER AND
UNDER PVC PIPE.
10. GALVANIZED STEEL PIPE AND ALUMINIZED STEEL PIPE FOR ALL DRAINAGE FACILITIES SHALL HAVE ASPHALT
TREATMENT 11 OR BETTER INSIDE AND OUTSIDE.
11. STRUCTURES SHALL NOT BE PERMITTED WITHIN 10 FEET OF THE SPRING LINE OF ANY STORM DRAINAGE PIPE,
OR 15 FEET FROM THE TOP OF ANY CHANNEL BANK.
12. ALL CATCH BASIN GRATES SHALL BE DEPRESSED 0.10 FEET BELOW PAVEMENT LEVEL.
13. OPEN CUT ROAD CROSSINGS AND EXISTING PUBLIC RIGHT-OF-WAY WILL NOT BE ALLOWED UNLESS
SPECIFICALLY APPROVED BY CITY OF RENTON DEPARTMENT OF PUBLIC WORKS, DESIGN ENGINEER.
14. 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 SPECIFICATIONS: 4 INCHES TO 8 INCHES/40
PERCENT TO 70 PERCENT PASSING; 2 INCHES TO 4 INCHES ROCK/30 PERCENT TO 40 PERCENT PASSING; AND -2
INCHES ROCK/10 PERCENT TO 20 PERCENT PASSING.
15. ALL BUILDING DOWNSPOUTS AND FOOTING DRAINS SHALL BE CONNECTED TO THE STORM DRAINAGE SYSTEM
UNLESS APPROVED BY THE DEPARTMENT OF PUBLIC WORKS, DESIGN ENGINEER OR STORMWATER UTILITY. AN
ACCURATELY DIMENSIONED CERTIFIED AS -BUILT DRAWING OF THIS DRAINAGE SYSTEM WILL BE SUBMITTED
TO THE CITY OF RENTON UPON COMPLETION.
16. ISSUANCE OF THE BUILDING OR CONSTRUCTION PERMIT BY THE CITY OF RENTON DOES NOT RELIEVE THE
OWNER OF THE CONTINUING LEGAL OBLIGATION AND/OR LIABILITY CONNECTED WITH STORM SURFACE WATER
DISPOSITION. FURTHER, THE CITY OF RENTON DOES NOT ACCEPT ANY OBLIGATION FOR THE PROPER
FUNCTIONING AND MAINTENANCE OF THE SYSTEM PROVIDED DURING CONSTRUCTION.
17. THE CONTRACTOR SHALL BE RESPONSIBLE FOR PROVIDING ADEQUATE SAFEGUARD, SAFETY DEVICES,
PROTECTIVE EQUIPMENT, FLAGGERS, AND ANY OTHER NEEDED ACTIONS TO PROTECT THE LIFT, 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 TRAFFIC ENGINEERING
DIVISION OF THE DEPARTMENT OF PUBLIC WORKS. ALL SECTIONS OF THE WSDOT STANDARD SPECIFICATIONS
1-07.23, TRAFFIC CONTROL, SHALL APPLY.
18. SPECIAL DRAINAGE MEASURES WILL BE REQUIRED IF THE PROJECT LOCATION IS WITHIN THE AQUIFER
PROTECTION AREA.
EROS"I CONTROL NOTES
1. BEFORE ANY CONSTRUCTION OR DEVELOPMENT ACTIVITY OCCURS, A PRE -CONSTRUCTION
MEETING MUST BE HELD WITH THE CITY OF RENTON DEPARTMENT OF PUBLIC WORKS,
DESIGN ENGINEER.
2. ALL LIMITS OF CLEARING AND AREAS OF VEGETATION PRESERVATION AS PRESCRIBED ON
THE PLAN SHALL BE CLEARLY FLAGGED IN THE FIELD AND OBSERVED DURING
CONSTRUCTION.
3. ALL REQUIRED SEDIMENTATION/EROSION CONTROL FACILITIES MUST BE CONSTRUCTED AND
IN OPERATION PRIOR TO LAND CLEARING AND/OR OTHER CONSTRUCTION TO INSURE THAT
SEDIMENT LADEN WATER DOES NOT ENTER THE NATURAL DRAINAGE SYSTEM. ALL EROSION
AND SEDIMENT FACILITIES SHALL BE MAINTAINED IN A SATISFACTORY CONDITION UNTIL
SUCH TIME THAT CLEARING AND/OR CONSTRUCTION IS COMPLETED AND POTENTIAL FOR
ON -SITE EROSION HAS PASSED. THE IMPLEMENTATION, MAINTENANCE, REPLACEMENT AND
ADDITIONS TO EROSION/SEDIMENTATION CONTROL SYSTEMS SHALL BE THE RESPONSIBILITY
OF THE PERMITTEE.
4. THE EROSION AND SEDIMENTATION CONTROL SYSTEMS DEPICTED ON THIS DRAWING ARE
INTENDED TO BE MINIMUM REQUIREMENTS TO MEET ANTICIPATED SITE CONDITIONS. AS
CONSTRUCTION PROGRESSES AND UNEXPECTED OR SEASONAL CONDITIONS DICTATE, THE
PERMITTEE SHALL ANTICIPATE THAT MORE EROSION AND SEDIMENTATION CONTROL
FACILITIES WILL BE NECESSARY TO INSURE COMPLETE SILTATION CONTROL ON THE
PROPOSED SITE. DURING THE COURSE OF CONSTRUCTION, IT SHALL BE THE OBLIGATION
AND RESPONSIBILITY OF THE PERMITTEE TO ADDRESS ANY NEW CONDITIONS THAT MAY BE
CREATED BY HIS ACTIVITIES AND TO PROVIDE ADDITIONAL FACILITIES, OVER AND ABOVE
MINIMUM REQUIREMENTS, AS MAY BE NEEDED TO PROTECT ADJACENT PROPERTIES AND
WATER QUALITY OF THE RECEIVING DRAINAGE SYSTEM.
5. APPROVAL OF THIS PLAN IS FOR EROSION/SEDIMENTATION CONTROL ONLY. IT DOES NOT
CONSTITUTE AN APPROVAL OF STORM DRAINAGE DESIGN, SIZE NOR LOCATION OF PIPES,
RESTRICTORS, CHANNELS, OR RETENTION FACILITIES.
6. DURING THE TIME PERIOD OF NOVEMBER 1 THROUGH MARCH 31, ALL PROJECT DISTURBED
SOIL AREAS GRATER THAN 5,000 SQUARE FEET THAT ARE TO BE LEFT UNWORKED OF MORE
THAN 12 HOURS, SHALL BE COVERED BY MULCH, SODDING, OR PLASTIC COVERING.
7. IN ANY AREA WHICH HAS BEEN STRIPPED OF VEGETATION AND WHERE NO FURTHER WORK
IS ANTICIPATED FOR A PERIOD OF 30 DAYS OR MORE, ALL DISTURBED AREAS MUST BE
IMMEDIATELY STABILIZED WITH MULCHING, GRASS PLANTING OR OTHER APPROVED
EROSION CONTROL TREATMENT APPLICABLE TO THE TIME OF YEAR IN QUESTION. GRASS
SEEDING ALONG WILL BE ACCEPTABLE ONLY DURING THE MONTHS OF APRIL THROUGH
SEPTEMBER INCLUSIVE. SEEDING MAY PROCEED, HOWEVER, WHENEVER IT IS IN THE
INTEREST OF THE PERMITTEE, BUT MUST BE AUGMENTED WITH MULCHING, NETTING, OR
OTHER TREATMENT APPROVED BY THE CITY OF RENTON, OUTSIDE THE SPECIFIED TIME
PERIOD.
CALL 2 WORKING DAYS
BE YOU DIGS
811
CONSTRUCTIC'1�1 NOTES AND DETAILS
HARPER ENGINEERING ADDITION
SW 1/4 SECTION 18, TWP. 23 N., RQE. 5 E., W.M. IO
ASPHALT
EXTRUDED CONCRETE CURB DETAIL
NOT TO SCALE
2" COMPACTED DEPTH -
CLASS 'B' A.C. PAVEMENT
4" COMPACTED DEPTH CRUSHED
ROCK BASE COURSE
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12" MIN. SUBGRADE COMPACTED
TO 95% DRY DENSITY
TYPICAL ASPHALT PAVING SECTION
NOT TO SCALE
COMPACT BACKFILL-
8" DIA. PERFORATED PVC PIPE
w/ HOLES DOWN
WRAP INFILTRATION TRENCH W,
FILTER FABRIC TOP AND SIDES
FINISH GRADE
SEAL JOINT PATCH SURFACING TO
MEET AND MATCH EXISTING.
MINIMUM SECTION TO BE
SAWCUT PAV'T _ 3" A.C. PAV'T CL. B OVER
12 OUTSIDE OF 4" CRUSHED ROCK BASE
TRENCH EDGES
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NOT TO SCALE
STRUCTURAL FILL
MATERIAL COMPACTED
TO 95% OF MAX.
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SUBGRADE OR STRUCTURAL
FILL MATERIAL COMPACTED
TO 90% OF MAX. DENSITY
GRAVEL BACKFILL FOR
PIPE BEDDING COMPACTED
TO 95% OF MAX. DENSITY
NOTES:
1. PROVIDE 4" SAND BLANKET BEDDING FOR RIGID PIPE
2. ALL TESTING OF BACKFILL AND COMPACTION SHALL BE
IN CONFORMANCE WITH ASTM D-1557
BY
BY
ASPHALT PAVEMENT
(SEE SECTION THIS SHEET)
�
411
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3/4"-1 1 /2" WASHED GRAVEL
- 6" MIN
DOWNSPOUT DRAIN
INFILTRATION TRENCH SECTION
NOT TO SCALE
TO CITY STANDAMS
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Date
Date
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NOTES
1. As an acceptable attemate to rebar, wire mesh having a
minimum area of 0.12 square inches per foot may be used.
Wire mesh shall not be placed in knockouts.
2. The knockout diameter shall not be greater than 16".
Knockouts shall have a wall thickness of 2" minimum to
2.5" maximum.
3. The maximum depth from the finished grade to the pipe
invert shall be 5'.
4. Frame and grate may be installed with flange dawn or cast
into adjustment section.
5. The precast base section may have a rounded floor and
the walls may be sloped at a rate of 1:24 or steeper.
6. Opening shall be measured at the top of the precast base
section.
�6" OR 12"
ONE #3 BAR HOOP FOR 6" HEIGHT
TWO #3 BAR HOOPS FOR 12" HEIGHT
RECTANGULAR ADJUSTMENT SECTION
#3 BAR EACH CORNER
,
OVA J. J`I
di
#3 BAR EACH SIDE
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'
€XPIRES JtN,Y I, 2005
CATCH MMN TYPE 1P
#3 BAR EACH WAY
PA1l 6 LOT C. D.
sTAiIIIIIIIAIr PLAN &1b
PRECAST BASE SECTION
D-314005
DEVELOPER:
HARPER ENGINEERING
700 SW 7TH STREET
�P PN I L / pA RENTON, WA 98057
O� IJF W A S111
o ENGINEER:
BARGHAUSEN CONSULTING ENGINEERS
18215 72ND AVENUE SOUTH
38375 �p ��� KENT, WA 98032
Fss��S T E�NG�� (425)251-6222
NA L E (425)251-8782 FAX
CONTACT: DAN BALMELLI
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Om ot"c"ato"s on "ccTMWKI ADOPTED
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G� p� CITY OF RENTON
STANDARD PLANS
LAST DATE: 06/23/2004
SP PAGE B013
CITY OF RENTON
DEPARTMENT OF PUBLIC WORKS
CONSTRUCTION NOTES AND DETAILS
FIARPER ENGINEERING ADDiTION
DESKE4M C P
DATE 03/ 19/2014 FLE NO.
DRAWN DSC
CHECKED D K B SCALE N /A FiEI.D BOOK PACE
APPROVED C6 6
DIRECTOR OF PUBLIC WORKS SHEET
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