HomeMy WebLinkAboutTED4001770.1NOTES AND SPECIFICATIONS FOR STORM DRAINS
1. ALL CONSTRUCTION SHALL BE IN ACCORDANCE WITH "STANDARD
SPECIFICATIONS FOR MUNICIPAL PUBLIC WORKS CONSTRUCTION"
PREPARED BY WASHINGTON STATE CHAPTER AMERICAN PUBLIC WORKS
ASSOCIATION, 1981 (APWA) AND CITY OF RENTON STANDARDS.
2. CONTRACTOR SHALL PROVIDE AND MAINTAIN TEMPORARY
SEDIMENTATION/COLLECTION FACILITIES TO INSURE THAT SEDIMENT
LADEN WATER DOES NOT ENTER NATURAL DRAINAGE SYSTEM. THESE
FACILITIES MUST BE IN OPERATION PRIOR TO CLEARING AND
CONSTRUCTION AND MUST BE MAINTAINED UNTIL CONSTRUCTION AND
LANDSCAPING ARE COMPLETED AND THE POTENTIAL FOR ON -SITE
EROSION HAS PASSED.
3. ALL LOCATIONS OF EXISTING UTILITIES SHOWN ARE APPROXIMATE
AND IT SHALL BE THE CONTRACTOR'S RESPONSIBILITY TO VERIFY
THE TRUE AND CORRECT LOCATION SO AS TO AVOID DAMAGE OR
DISTURBANCE.
4. A PRECONSTRUCTION CONFERENCE AND A 24 HOUR NOTICE SHALL BE
REQUIRED PRIOR TO STARTING NEW CONSTRUCTION. IT SHALL BE
THE CONTRACTOR'S RESPONSIBILITY TO SECURE ALL NECESSARY
PERMITS PRIOR TO STARTING CONSTRUCTION. (INSPECTION WILL BE
ACCOMPLISHED BY A REPRESENTATIVE OF THE CITY OF RENTON). IT
SHALL BE THE CONTRACTOR'S RESPONSIBILITY TO NOTIFY THE
UTILITY DEPARTMENT 24 HOURS IN ADVANCE OF BACKFILLIG ALL
CONSTRUCTION.
5. STORM SEWER PIPE SHALL -BE CONCRETE RUBBER GASKETED ASTM
C-14, CL.2 OR ASTM C-76 II CORRUGATED METAL PIPE WITH GAUGE
PER CHART SHOWN BELOW. STEEL OR ALUMINUM PIPE SHALL HAVE
WATERTIGHT CONNECTING BANDS. STEEL PIPE SHALL RECEIVE
ASPHALT COATING INSIDE AND OUTSIDE, TREATMENT 1 OR BETTER.
CORRUGATED METAL PIPE SHALL HAVE TREATMENT 5 ASPHALT
COATING WHERE SHOWN ON PLAN. SANITARY SEWER PIPE SHALL BE
POLYVINYL CHLORIDE (PVC) PER ASTM D 3034 SDR 35 WITH A
MINIMUM COVER OF 3 FEET. WATER MAIN PIPE SHALL BE DUCTILE
IRON CLo52 WITH A MINIMUM COVER OF 3 FEET.
------2-2/3- INCH -BY-1/2-INCH -(NOMINAL)- CORRUGATIONS
-------4
MINIMUM GAUGE GALVANIZED STEEL ALUMINUM
16 8" TO 48" 8" TO 27"
14 5411 30" TO 36"
12 60" TO 66" 42" TO 54"
10 7211 60" TO 72"
8 78" TO 96" 78" TO 84"
CONTRACTOR NOTE:
WHERE STORM DRAIN CROSSES
EXISTING WATER MAIN & GAS
MAIN FIELD, LOCATE EXIST-
ING LINE PRIOR TO ANY CON-
STRUCTION. EXCAVATE BY
HAND ONLY WHEN WITHIN THREE
FEET HORIZONTALLY OR VERT-
ICALLY OF 20 INCH GAS MAIN.
TOP OF PIPE_ 9.50 _____-
INV. ELF_. 11.015
CALL 48 HOURS
BEFORE YOU DIG
1-800-424-5555 Ttc,� _ �o - ♦»o
3 INCH BY 1 INCH CORRUGATIONS
MINIMUM GAUGE GALVANIZED STEEL ALUMINUM
16 36" TO 102" 30" TO
60"
14 108" TO 114" 66" TO
72"
12 120" 78" TO
96"
6.
BEDDING FOR STORM DRAIN PIPE SHALL BE CLASS "B" PER
APWA
STANDARD PLAN NO. 62 (PEA GRAVEL FROM 4 INCHES BELOW
PIPE
TO SPRINGLINE FOR PIPES 27 INCH AND SMALLER AND FROM
6
INCHES BELOW PIPE TO SPRINGLINE FOR PIPES 30 INCHES
AND
LARGER).
7.
TRENCH WIDTH SHALL BE 40 INCH MINIMUM OR 1-1/2 TIMES
THE
PIPE DIAMETER PLUS 18 INCHES WHICHEVER IS GREATER. BACKFILL
SHALL BE PLACED EQUALLY ON BOTH SIDES OF THE PIPE IN 6
INCH
LAYERS COMPACTED TO 95 PERCENT OF MAXIMUM DENSITY.
8.
TYPE 1 CATCH BASINS SHALL BE APWA STANDARD PLAN NO.
52,
TYPE 1-C WITH APWA STANDARD PLAN NO. 49 FRAME AND GRATE
AND
TYPE 60 OUTLET TRAP. TYPE II CATCHBASINS SHALL BE
APWA
STANDARD PLAN NO. 55, TYPE II-C WITH THE SAME FRAME
AND
GRATE.
9.
CONTRACTOR IS SOLEY RESPONSIBLE FOR THE MEANS, METHODS
AND
SEQUENCES OF CONSTRUCTION AND FOR THE SAFETY OF WORKERS
AND
OTHERS ON THE CONSTRUCTION SITE.
NOTE
Trap to be made of 22 Go. Galvan-
ized sheet metal.
All joints to be seamed and soldered.
All longitudinal joints to be riveted.
Dimension 'D' is nominal diameter of
outlet pipe.
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DRAWN BY CHECKED By
PG RGG
SCALE DATE
T' = 2 0' 12 85
JOB NO
85161 .03
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CITY OF RENTON DEFT OF PUBLIC WORKS DATE 'SHEET 1 of 2
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