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GRAPHIC SCALE
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KEY NOTES
OSDCB
#i, TYPE 1
a
W/ SOLID LOCKING UD
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RIM= 420.49
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IE= 416.53 (12" S, 8" SE)
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E-1302533.67
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117 LF 12" SD 0 0.61%
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SDCB #6, TYPE 2-48"0
D
W/ SOLID LOCKING UD
RIM= 420.92
IE= 416.49 (4" S)
IE= 416.53 (8" NE)
IE= 415.82 (12" N, NW, SE)
N-170422.97
E-1302538.8
OSDCB
#12, TYPE 1
RIM= 420.90
IE= 417.90 (12" W)
N-170366.28
E-1302920.56
O
100 LF 12" SD 0 0.50%
OSDCB
#13, TYPE 1
RIM= 421.15
IE= 417.40 (12" E, W)
N-170353.28
E-1302821.41
O
80 LF 12" SD 0 0.50%
OSDCB
#14, TYPE 1
RIM= 420.90
IE= 417.00 (12" E, W)
N-170349.76
E-1302741.49
O9
80 LF 12" SD 0 0.50%
10
SDCB #15, TYPE 1
RIM= 420.90
IE= 416.60 (12" NW, E)
N-170346.25
E-1302661.57
11 80 LF 12" SD 0 0.50%
12 SDCB #16, TYPE 1
RIM= 420.90
IE= 416.87 (4" E)
IE= 416.20 (12" NW, SE)
N-170359.35
E-1302582.65
13 77 LF 12" SD 0 0.50%
S30 LF 4" SD 0 0.50%
(SEE LANDSCAPE PLANS FOR
CONTINUATION AT VAULT)
15 48 LF 4" SD 0 0.50%
(SEE LANDSCAPE PLANS FOR
CONTINUATION AT VAULT)
16 18 LF 6" SD 0 0.50% MIN.
(SEE LANDSCAPE PLANS FOR
CONTINUATION)
17 PROVIDE A TWO-WAY SANITARY SEWER
CLEANOUT ON EXISTING SERVICE.
Checked for Compliance to City Standards
INFORMATION SUBMITTED, IN PART, BY OTHERS. WHILE THIS
7. SEE SHEET C2.2 FOR STANDARD DRAINAGE NOTES. INFORMATION IS BELIEVED TO BE RELIABLE,S"� SCAB
AH B L t S NOT vWcx: w►w I
AIN PIPE INVERT ELEVATIONS. RESPONSIBLE FOR ITS ACCURACY, OR ERROR OR OMISSIONS "°
AS NOTED "` w°'�°' CITY OF
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8. SEE SHEET L3.1 FOR UNDERDR WHICH MAY HAVE BEEN INCORPORATED INTO THIS DOCUMENT W. FIERST AS A RESULT. THOSE RELYING ON THIS RECORD DOCUMENT �� � RENTON
9. FINISHED GRADES ARE INDICATED. CONTRACTOR SHALL EXCAVATE AND ARE ADVISED TO OBTAIN INDEPENDENT VERIFICATION OF ITS M. STEWART o,,,� wcr DATUM
FILL TO ACHIEVE PROPER SUBGRADES. ACCURACY BEFORE APPLYING IT FOR ANY PURPOSE. ing/Public Works Dept.
IF Noir OW RM
NO. REVISION BY DATE APPR wPw�m- SCAM ACCOM MiGLY
D. GAVIN
364715
DRAINAGE NOTES
1. PROOF OF LIABILITY INSURANCE SHALL BE SUBMITTED TO DDES PRIOR
TO THE CONSTRUCTION OF THE DRAINAGE FACILITIES, PREFERABLY AT
THE PRECONSTRUCTION MEETING.
2. ALL PIPE AND APPURTENANCES SHALL BE LAID ON A PROPERLY
PREPARED FOUNDATION IN ACCORDANCE WITH WSDOT SPECIFICATIONS.
THIS SHALL INCLUDE LEVELING AND COMPACTING THE TRENCH BOTTOM,
THE TOP OF THE FOUNDATION MATERIAL, AND ANY REQUIRED PIPE
BEDDING, TO A UNIFORM GRADE SO THAT THE ENTIRE PIPE IS
SUPPORTED BY A UNIFORMLY DENSE UNYIELDING BASE.
3. STEEL PIPE SHALL BE ALUMINIZED, OR GALVANIZED WITH ASPHALT
TREATMENT #1 OR BETTER INSIDE AND OUTSIDE.
4. ALL DRAINAGE STRUCTURES, SUCH AS CATCH BASINS AND MANHOLES,
NOT LOCATED WITHIN A TRAVELED ROADWAY OR SIDEWALK, SHALL
HAVE SOLID LOCKING UDS. ALL DRAINAGE STRUCTURES ASSOCIATED
WITH A PERMANENT RETENTION/DETENTION FACILITY SHALL HAVE SOLID
LOCKING LIDS.
5. ALL CATCH BASIN GRATES SHALL CONFORM TO KCRS, WHICH INCLUDES
THE STAMPING "OUTFALL TO STREAM, DUMP NO POLLUTANTS" AND
"PROPERTY OF KING COUNTY, EXCEPT THAT PRIVATE DRAINAGE
SYSTEMS SHALL NOT HAVE THE WORDS "PROPERTY OF CITY OF
RENTON".
6. ALL DRIVEWAY CULVERTS LOCATED WITHIN CITY OF RENTON
RIGHT-OF-WAY SHALL BE OF SUFFICIENT LENGTH TO PROVIDE A
MINIMUM 3:1 SLOPE FROM THE EDGE OF THE DRIVEWAY TO THE
BOTTOM OF THE DITCH. CULVERTS SHALL HAVE BEVELED END
SECTIONS TO MATCH THE SIDE SLOPE KCRS.
7. ROCK FOR EROSION PROTECTION OF ROADWAY DITCHES, WHERE
REQUIRED, MUST BE OF SOUND QUARRY ROCK, PLACED TO A DEPTH
OF 1 FOOT, AND MUST MEET THE FOLLOWING SPECIFICATIONS:
4"-8"/40%70% PASSING; 2"- 4" ROCK/307w-40% PASSING; AND -2"
ROCK/107o-20% PASSING. INSTALLATION SHALL BE IN ACCORDANCE
WITH KCRS.
8. DRAINAGE OUTLETS (STUB -OUTS) SHALL BE PROVIDED FOR EACH
INDIVIDUAL LOT, EXCEPT FOR THOSE LOTS APPROVED FOR INFILTRATION
BY CITY OF RENTON. 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 KCRS AND, IF NON-METALLIC, THE PIPE SHALL
CONTAIN WIRE OR OTHER ACCEPTABLE DETECTION.
D) 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 THE UTILITIES (E.G. POWER, GAS, TELEPHONE, TELEVISION).
F) ALL INDIVIDUAL STUB -OUTS SHALL BE PRIVATELY OWNED AND
MAINTAINED BY THE LOT HOME OWNER.
9. 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.
10. SEASONAL CLEARING IS LIMITED BETWEEN OCTOBER 1 AND MARCH 30
INCLUSIVE, UNLESS OTHERWISE APPROVED WITH A WRITTEN DECISION
BY THE REVIEWING AGENCY.
11. IMPROVEMENTS AND/OR BUILDINGS SHALL NOT BE INSTALLED UNTIL
DRAINAGE FACILITIES ARE 1N OPERATION", (KCC 9.04).
Civil Engineers
Structural Engineers
Landscape Architects
Community Planners
Land Surveyors
Neighbors
NOTICE TACOMA • SEATTLE
K� SM MW SWU �= W 2215 North 30th Street, Suite 300, Tacoma, WA 98403
IM M1'�WMN,M 6 253.383.2422 TEL
" e 5,r,o ='0�M, MM OR 1200 Sixth Avenue, Suite 1620, Seattle, WA 98101
A90 M M IMT FFACI OR FM iwr OW mu'17 206.267.2425 TEL
NELSEN MIDDLE SCHOOL SITE IMPROVEMENTS APRIL 2013
RENTON SCHOOL DISTRICT nalso .
PAGE
MAW& G
GRADING, STORM DRAINAGE AND UTILITY PLAN C2.2
8 12
EMERREEN
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