HomeMy WebLinkAbout263.40 PLAN VIEW OF PARCEL
TO STORM DRAIN SYSTEMRIGHT-OF-WAYGENERAL NOTES:
1.INFILTRATION TRENCHES LIMITED TO ROOF RUNOFF FROM SINGLE-FAMILY OR DUPLEX HOMES OR TO CONTROL
BASEMENT FLOODING. CONSULT WA DEPARTMENT OF ECOLOGY REGULATIONS FOR UNDERGROUND INJECTION
CONTROL PROGRAM (UIC) FOR OTHER TYPES OF RUNOFF MANAGEMENT.
2.IMPERVIOUS AREAS LARGER THAN 10,000 SF AND NON-NATIVE PERVIOUS AREAS LARGER THAN 35,000 SF MAY REQUIRE
LARGER PIPE AND SHOULD BE DESIGNED BY A CIVIL ENGINEER.
3.THE PERFORATED PIPE MAY NOT BE PLACED IN A CRITICAL AREA BUFFER OR ON SLOPES STEEPER THAN 25%.
4.SEE CONSTRUCTION PLANS FOR SPECIFIC PROJECT REQUIREMENTS.
24" MIN.
18" MIN.
MIN. 1' ABOVE SEASONAL HIGH
GROUNDWATER TABLE
6" MIN.
3/4" - 1 1/2" WASHED DRAIN ROCK
OR GRAVEL BACKFILL FOR
DRYWELLS PER WSDOT STD.
SPECIFICATION SECTION 9-03.12(5)
NON-WOVEN GEOTEXTILE FOR SEPARATION
ON TOP AND SIDES OF TRENCH PER WSDOT
SPECIFICATIONS SECTION 9-33.2(1) TABLE 3
COMPACTED TOPSOIL OR OTHER CLEAN FILL
6" DIA. MIN.
PERFORATED PVC,
SDR 35 PER ASTM D3034
10' MIN. LEVEL TRENCH WITH
PERFORATED PIPE, SEE NOTE 1
DOWNSPOUT WITH CLEANOUT
FILTER, SEE DETAIL ASECTION A
NOTES:
1.TRENCH LENGTH TO BE 10 FEET IN LENGTH FOR EVERY 5,000 SF OF CONTRIBUTING IMPERVIOUS SURFACE, OR 35,000 SF
OF NON-NATIVE PERVIOUS SURFACE, OR PORTION THEREOF.
5'
MIN.
5'
MIN.
TO STORM DRAIN SYSTEM
5'
MIN.
5'
MIN.
A
DOWNSPOUT WITH CLEANOUT FILTER, SEE DETAIL
10' MIN. LEVEL TRENCH WITH
PERFORATED PIPE, SEE NOTE 1
CONFIGURATION ON FLAT GROUND
CONFIGURATION ON SLOPING GROUND
UNDISTURBED NATIVE SOIL
CLEANOUT PER STD. PLAN 226.00
CLEANOUT PER
STD. PLAN 226.00
FILTER SCREEN
2'-5' TO
GROUND
SOLIDS/
LEAVES
TYPICAL DOWNSPOUT
FILTER DETAIL
FOOTING DRAIN BYPASS
CLEANOUT PER
STD. PLAN 226.00
PERFORATED STUB-OUT
CONNECTION
PUBLIC WORKS
DEPARTMENT
APPROVED:
DATEMartin Pastucha
Public Works Administrator
UNLESS OTHERWISE NOTED, DRAWING IS NOT TO SCALE (NTS)
STD. PLAN - 263.40
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11/2/2020 | 1:04 PM PST