HomeMy WebLinkAboutP_Drainage Site Plan Lot 17_190402_ApprovedDEVELOPMENT ENGINEERINGbbannwarth 04/23/2019
DEVELOPMENT ENGINEERINGbbannwarth 04/23/2019
PLAN VIEW OF PARCEL
TO STORM DRAINSYSTEMRIGHT-
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.1 1/2" - 3/4"
WASHED DRAIN
ROCK 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" MIN.
PVC PERFORATED
PIPE PER ASTM
D1785 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:DATEGregg
Zimmerman Public Works
Administrator UNLESS OTHERWISE NOTED, DRAWING IS NOT TO SCALE (
NTS)STD. PLAN - 263.
40 DocuSign Envelope ID: 6EECF5B6-602A-4E4A-B436-
A317AA638878 9/28/2018 | 9:45 AM