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-#5 @ 12" O.C. SHORT (4) #5 TOP &
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AS REQUIRED TO
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ACCESS RISER
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CONCRETE: 4000 PSI MIN. @ 28
DAYS 6 SACK MIX REBAR
GRADE 60
DETENTION PIPE ACCESS RISER - TRAFFIC BEARING
CL BOLT -DOWN CIRCULAR FRAME
AND COVER PER WSDOT STD
PLAN B-30.70-03
4" STYROFOAM MAT CUTOUT @
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SURFACE WATER STANDARD PLAN NOTES AND CONSTRUCTION SEQUENCE
1. THESE NOTES SHALL APPEAR ON PROJECTS FOR THE SURFACE WATER UTILITY.
2. BEFORE ANY CONSTRUCTION OR DEVELOPMENT ACTIVITY OCCURS, A PRE -CONSTRUCTION MEETING MUST BE HELD
BETWEEN THE CITY OF RENTON PLAN REVIEW SECTION AND THE APPLICANT.
3. ALL DESIGN AND CONSTRUCTION SHALL BE IN ACCORDANCE WITH THE RENTON MUNICIPAL CODE (RMC), THE LATEST EDITION
OF THE STANDARD SPECIFICATIONS FOR ROAD, BRIDGE AND MUNICIPAL CONSTRUCTION PREPARED BY WSDOT AND THE
AMERICAN PUBLIC WORKS ASSOCIATION (APWA), AS AMENDED BY THE CITY OF RENTON PUBLIC WORKS DEPARTMENT. IT
SHALL BE THE SOLE RESPONSIBILITY OF THE APPLICANT AND THE PROFESSIONAL CIVIL ENGINEER TO CORRECT ANY ERROR,
OMISSION OR VARIATION FROM THE ABOVE REQUIREMENTS FOUND IN THIS PLANS. ALL CORRECTIONS SHALL BE AT NO
ADDITIONAL COST TO THE CITY.
4. APPROVAL OF THIS ROAD, GRADING, PARKING AND DRAINAGE PLAN DOES NOT CONSTITUTE AN APPROVAL OF ANY OTHER
CONSTRUCTION (E.G. DOMESTIC WATER CONVEYANCE, SEWER CONVEYANCE, GAS, ELECTRICAL. ETC.)THE SURFACE WATER
DRAINAGE SYSTEM SHALL BE CONSTRUCTED ACCORDING TO THE APPROVED PLANS, WHICH ARE ON FILE IN WITH THE CITY.
ANY DEVIATION FROM THE APPROVED PLANS WILL REQUIRE WRITTEN APPROVAL FROM THE CITY OF RENTON PUBLIC WORKS
DEPARTMENT, SURFACE WATER UTILITY SECTION.
5. A COPY OF THESE APPROVED PLANS MUST BE ON THE JOB SITE WHENEVER CONSTRUCTION IS IN PROGRESS.
6. GRADING ACTIVITIES (SITE ALTERATION) ARE LIMITED TO THE HOURS OF 7 A.M. TO 7 P.M. MONDAY THROUGH SATURDAY AND
NO WORK ON SUNDAY IS ALLOWED, UNLESS OTHERWISE APPROVED WITH A WRITTEN DECISION BY THE CITY OF RENTON.
7. IT SHALL BE THE APPLICANT'S/CONTRACTOR'S RESPONSIBILITY TO OBTAIN ALL CONSTRUCTION EASEMENTS NECESSARY
BEFORE INITIATING OFF -SITE WORK. EASEMENTS REQUIRE CITY REVIEW AND APPROVAL PRIOR TO CONSTRUCTION.
8. FRANCHISED UTILITIES OR OTHER INSTALLATIONS THAT ARE NOT SHOWN ON THESE APPROVED PLANS SHALL NOT BE
CONSTRUCTED UNLESS AN APPROVED SET OF PLANS THAT MEET ALL REQUIREMENTS OF CHAPTER 4 OF THE SURFACE
WATER DESIGN MANUAL ARE SUBMITTED TO THE CITY OF RENTON.
9. DATUM SHALL BE NAVD 88 UNLESS OTHERWISE APPROVED BY THE CITY OF RENTON. REFERENCE BENCHMARK AND
ELEVATIONS ARE NOTED ON THE PLANS.
10. ANY DEWATERING SYSTEM NECESSARY FOR THE CONSTRUCTION OF STORMWATER FACILITIES MUST BE SUBMITTED TO THE
CITY FOR REVIEW AND APPROVAL.
11. ALL UTILITY TRENCHES AND ROADWAY SUBGRADE SHALL BE BACKFILLED AND COMPACTED TO 95 PERCENT DENSITY,
STANDARD PROCTOR.
12. OPEN CUTTING OF EXISTING ROADWAYS FOR NON -FRANCHISED UTILITY OR STORM DRAINAGE WORK IS NOT ALLOWED
UNLESS SPECIFICALLY APPROVED BY THE CITY OF RENTON AND NOTED ON THESE APPROVED PLANS. ANY OPEN CUT SHALL
BE RESTORED IN ACCORDANCE WITH THE CITY OF RENTON TRENCH RESTORATION STANDARDS.
13. 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.
14. ALL RETENTION/DETENTION FACILITIES MUST BE INSTALLED AND IN OPERATION PRIOR TO OR IN CONJUNCTION WITH ALL
CONSTRUCTION ACTIVITY UNLESS OTHERWISE APPROVED BY THE PUBLIC WORKS DEPARTMENT, SURFACE WATER UTILITY
SECTION.
15. ALL PIPE AND APPURTENANCES SHALL BE LAID ON A PROPERLY PREPARED FOUNDATION IN ACCORDANCE WITH 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 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.
16. STEEL PIPE SHALL BE ALUMINIZED, OR GALVANIZED WITH ASPHALT TREATMENT #1 OR BETTER INSIDE AND OUTSIDE.
17. ALL DRAINAGE STRUCTURES, SUCH AS CATCH BASINS AND MANHOLES SHALL HAVE SOLID LOCKING LIDS. ALL DRAINAGE
STRUCTURES ASSOCIATED WITH A PERMANENT RETENTION/DETENTION FACILITY SHALL HAVE SOLID LOCKING LIDS.
18. BUILDING AND OTHER STRUCTURES SHALL BE PLACED IN ACCORDANCE WITH TABLE 4.1 EASEMENT WIDTHS AND BUILDING
SETBACKS LINES.
AS -BUILT
I CERTIFY THAT THE INFORMATION SHOWN HEREON
WHICH WAS AS -BUILT BY AHBL ,AND MAY INCLUDE NOTICE
LOCATIONS, ELEVATIONS, DEPTHS, PIPE SIZES, AND ALTERATIONaFTNISDOOIYENrSHALLNVMIDAIETIE
PROFES90NAL SEAL AND SRNATURE. PUBLICATION OF
AS -BUILT COMMENTS, ACCURATELY REFLECTS EXISTING TNISDOCI11E11TD0ESNorDEROGATEFROMRESERVED
OINERSIIP RN;Ii1S N R THIS DDCUIENT IS FOR USE
FIELD CONDICTIONS AS DETERMINED BY ME OR UNDER MY afLYFORTNEPRo�ECTIDENiFIDN1HE11TLEBLOOC
AND IS NOT TO BE USED FOR REPAN, REMODEL OR
DIRECT SUPERVISION ON THIS DATE: 08/23/2019. ADDITIDNTOTNArPRaECTaRFaRANroTNERPRo�Ecr.
LJ
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LOAD TRANSFER SLAB
LADDER LATERAL
SUPPORT SECURED
TO PIPE OR RISER
AS APPLICABLE, 4'
MAX SPACING, MIN.
2 REQ'D
STEPS @ 12" O.C.
36"0 CMP RISER WELDED TO
CMP DETENTION TANK FOR ADS
N-12 PIPE, PROVIDE 36" RISER
FUSED TO DETENTION TANK BY
MANUFACTURER
18" MAX
6" MIN
EDGE OF SLAB SHALL EXTEND
PAST EDGE OF TANK AND
SHALL NOT REST ON PIPE
PREFABRICATED LADDER (WSDOT STD. PLAN
NO. B-30.90-01) ATTACH TO LOAD TRANSFER
SLAB. TYPICAL FOR ALL PIPE TYPES
PER PLAN
NOTES:
1. LOAD TRANSFER SLAB IS REQUIRED ON RISERS LOCATED WITHIN PAVED AREAS.
2. LOAD TRANSFER SLAB SHALL BE OMITTED FROM RISERS LOCATED WITHIN RAINGARDEN
AREAS.
3. ACCESS RISERS ARE SAME MATERIAL AS DETENTION TANKS.
4. ACCESS RISER SPACING IS 100' MAXIMUM.
5. ACCESS OPENING SHALL BE CLEARLY MARKED WITH CONFINED SPACE WARNING IN
ACCORDANCE WITH OSHA REQUIREMENTS
19. ALL CATCH BASIN GRATES SHALL BE DEPRESSED 0.10 FEET BELOW PAVEMENT LEVEL.
20. ALL DRIVEWAY CULVERTS LOCATED WITHIN CITY OF RENTON RIGHT-OF-WAY SHALL BE OF SUFFICIENT LENGTH TO PROVIDE A
MINIMUM 3A SLOPE FROM THE EDGE OF THE DRIVEWAY TO THE BOTTOM OF THE DITCH. ROCK FOR EROSION PROTECTION OF
ROADSIDE DITCHES, WHERE REQUIRED, SHALL BE OF SOUND QUARRY ROCK PLACED TO A DEPTH OF ONE (1) FOOT AND MUST
MEET THE FOLLOWING SPECIFICATIONS:
4 - 8 INCH ROCK / 40 - 70% PASSING;
2 - 4 INCH ROCK / 30 - 40% PASSING; AND
LESS THAN 2 INCH ROCK / 10 - 20% PASSING.
21. ALL BUILDING DOWNSPOUTS AND FOOTING DRAINS SHALL BE CONNECTED TO THE STORM DRAINAGE SYSTEM, UNLESS
APPROVED BY THE CITY PLAN REVIEWER OR SURFACE WATER UTILITY SECTION. AN ACCURATELY DIMENSIONED, CERTIFIED
AS -BUILT DRAWING OF THIS DRAINAGE SYSTEM WILL BE SUBMITTED TO THE CITY UPON COMPLETION.
22. DRAINAGE OUTLETS (STUB -OUTS) SHALL BE PROVIDED FOR EACH INDIVIDUAL LOT, EXCEPT FOR THOSE LOTS APPROVED FOR
INFILTRATION BY THE CITY. STUB -OUTS SHALL CONFORM TO THE FOLLOWING:
a. EACH OUTLET SHALL BE SUITABLY LOCATED AT THE LOWEST ELEVATION ON THE LOT, SO AS TO SERVICE ALL FUTURE ROOF
DOWNSPOUTS AND FOOTING DRAINS, DRIVEWAYS, YARD DRAINS, AND ANY OTHER SURFACE OR SUBSURFACE DRAINS
NECESSARY TO RENDER THE LOTS SUITABLE FOR THEIR INTENDED USE. EACH OUTLET SHALL HAVE FREE -FLOWING, POSITIVE
DRAINAGE TO AN APPROVED STORMWATER CONVEYANCE SYSTEM OR TO AN APPROVED OUTFALL LOCATION.
b. OUTLETS ON EACH LOT SHALL BE LOCATED WITH A FIVE -FOOT -HIGH, 2" X 4" STAKE MARKED "STORM" OR "DRAIN". THE
STUB -OUT SHALL EXTEND ABOVE SURFACE LEVEL, BE VISIBLE, AND BE SECURED TO THE STAKE.
c. PIPE MATERIAL SHALL CONFORM TO UNDERDRAIN SPECIFICATIONS DESCRIBED IN CHAPTER 4 OF THE SURFACE WATER
DESIGN MANUAL AND, IF NON-METALLIC, THE PIPE SHALL BE PLACED IN A TRENCH WITH A TRACING WIRE ABOVE OR OTHER
ACCEPTABLE DETECTION.
d. PRIVATE DRAINAGE EASEMENTS ARE REQUIRED FOR DRAINAGE SYSTEMS DESIGNED TO CONVEY FLOWS THROUGH
INDIVIDUAL LOTS.
e. THE APPLICANT/CONTRACTOR IS RESPONSIBLE FOR COORDINATING THE LOCATIONS OF ALL STUB -OUT CONVEYANCE LINES
WITH RESPECT TO OTHER UTILITIES (E.G. POWER, GAS, TELEPHONE, TELEVISION).
f. ALL INDIVIDUAL STUB -OUTS SHALL BE PRIVATELY OWNED AND MAINTAINED BY THE LOT HOME OWNER.
g. STORM DRAINAGE PIPE SYSTEMS SHALL NOT PENETRATE BUILDING FOUNDATIONS, EXCEPT FOR SUMP PUMP DISCHARGE
LINES USED TO DRAIN CRAWL SPACES, PROVIDED THE SUMP PUMP SYSTEM INCLUDES BACKFLOW PREVENTION OR A CHECK
VALVE.
23. ALL DISTURBED PERVIOUS AREAS (COMPACTED, GRADED, LANDSCAPED, ETC.) OF THE DEVELOPMENT SITE MUST
DEMONSTRATE ONE OF THE FOLLOWING: THE EXISTING DUFF LAYER SHALL BE STAGED AND REDISTRIBUTED TO MAINTAIN
THE MOISTURE CAPACITY OF THE SOIL, OR; AMENDED SOIL SHALL BE ADDED TO MAINTAIN THE MOISTURE CAPACITY.
24. PROOF OF LIABILITY INSURANCE SHALL BE SUBMITTED TO THE CITY PRIOR TO CONSTRUCTION PERMIT ISSUANCE.
25. ISSUANCE OF THE BUILDING OR CONSTRUCTION PERMITS 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.
26. 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 THEPERFORMANCE OF WORK. ANY WORK WITHIN THE TRAVELED
RIGHT-OF-WAY THAT MAY INTERRUPT NORMAL TRAFFIC FLOW SHALL REQUIRE A TRAFFIC CONTROL PLAN APPROVE BY THE
PUBLIC WORKS DEPARTMENT, TRANSPORTATION SYSTEMS DIVISION. ALL SECTIONS OF THE WSDOT STANDARD
SPECIFICATIONS 1-07-23 TRAFFIC CONTROL SHALL APPLY.
27. PROJECT LOCATED WITHIN THE AQUIFER PROTECTION AREA (APA) SHALL COMPLY WITH SPECIAL REQUIREMENT #6 OF THE
SURFACE WATER DESIGN MANUAL AND AQUIFER PROTECTION REGULATIONS (RMC 4-3-050).
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�SSI 0NAL E��l 2215 North 30th Street, Suite 300 Tacoma, WA 98403 NO.
/23/201 9253.383.2422 TEL 253.383.2572 FAX www.ahbl.com NEB
RAMP REVISION
STORM DRAINAGE REVISIONS
CITY COMMENTS
ADDENDUM NO. 3
ADDENDUM NO. 1
REVISION
WJF
2/22/18
WJF
SURVEYED:
SCALE:
D. FOLLANSBEE
AS SHOWN
WJF
12/13/17
WJF
DESIGNED:
G. TAUSCHECK
WJF
4/21/17
WJF
WJF
3/17/171
WJF
DROWN:
F. KATONA
ONE INCH
AT FULL SCALE
IF NOT ONE INCH
WJF
3/1/17
WJF
CHECKED:
W. FIERST
BY
DATE
APPR
SCALE ACCORDINGLY
APPROVED:
S. COMFORT
CAST IROP
RING AN[
COVER PEF
CLEANOU-
DETAII
3000 psi CLASS C.
CONCRETE (TYP)
NOTES:
1. PIPE MATERIAL PER PLAN.
2. PIPE DIAMETER PER PLAN.
3. ABS TO PVC USE PVC
ADAPTOR OR FERNCO
W/STAINLESS STEEL
CLAMPS OR APPROVED
EQUAL.
4. PVC TO CAST IRON OR
CONCRETE USE FERNCO
W/STAINLESS STEEL
CLAMPS OR APPROVED
EQUAL.
DRILL AND TAP (SPLITTIN
THE SEAM) SET MADE BOL"
DOWN WITH 3/8" SS ALLEI`
HEAD BOLTS - 2 PLACE
1 /8" RAISE - 1 /2"
WIDE BORDER
p: .
12" 0
FIBRE JOINT
PACKING
45° (1/8) BEND
STORM SEWER
2'-0" -{
I� 4-3/4"
PROVIDE
WATER
TIGHT PLUG
LETTERING
"STORM"
r 5/8"
4"
CAST IRON RING AND LOCKING COVER
STORM DRAIN CLEANOUT
NOT TO SCALE
TWO-WAY CLEANOUT
NOT TO SCALE
CONSTRUCTION RECORD DRAWINGS
VERTIAL:NOR ZONTAL: NAD Di 9831968
1991
+�; CITY OF
RENTON
DATUM
Planning/Building/Public Works Dept.
BY:
BY:
BY:
BY:
LANDSCAPE AREAS: SET TOPS
AT OR JUST ABOVE GRADE.
SIDEWALK AREAS: SET TOPS
OF CLEANOUTS BENEATH
UTILITY BOX WITH TRAFFIC
RATED, LOCKABLE LID SET
FLUSH WITH WALKWAY.
PLAN FOR DIAMETER
+- PLUG TO BE
SEALED IN SAME
=�ZLJ
MANNER AS MAIN
SEWER JOINTS
APPROVED FOR CONSTRUCTION
SUBJECT TO ERRORS AND OMISSIONS
DATE:
DATE:
DATE:
DATE:
SARTORI ELEMENTARY SCHOOL
RENTON SCHOOL DISTRICT
STORM DRAINAGE NOTES
AND DETAILS 11
05/04/2017
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R-393028