HomeMy WebLinkAbout263.00PLAN
HOUSE
HOUSE
FLOW
2% SLOPE (1% MIN.)
4" CAPPED PVC OR GRATE INLET
AT SURFACE FOR OBSERVATION
ROOF DOWNSPOUT
OVERFLOW
SPLASH BLOCK
FINE MESH SCREEN, SS
304 10x10 OR SIMILAR
6" DIA.MIN. PVC,
SDR 35 PER ASTM D3034
SIDES AND TOP OF ROCK LINED WITH
NON-WOVEN GEOTEXTILE FOR
SEPARATION PER WSDOT 9-33.2(1)
CATCH BASIN
(YARD DRAIN)
ROOF
DOWNSPOUT MIN. 12" X 12"
CATCH BASIN
(YARD DRAIN)
DRYWELL
SOLID LID
OR GRATE
MIN. 50 GALLON PLASTIC
OR CONCRETE DRYWELL
15' MIN. AS REQUIRED,
SEE NOTE 1
12'' MIN.
TOPSOIL
12" MIN. ABOVE SEASONAL
HIGH GROUNDWATER OR
HYDRAULICALLY
RESTRICTIVE LAYER
5' MIN. SETBACK FROM
BUILDING
12'' MIN.
SUMP
24"
MIN.
24"
MIN.
GENERAL NOTES:
1.WHEN LOCATED IN COARSE SANDS AND COBBLES, DRYWELLS MUST CONTAIN A VOLUME OF GRAVEL EQUAL TO OR GREATER THAN 60 CUBIC FEET PER 1,000 SQUARE
FEET OF IMPERVIOUS SURFACE SERVED. WHEN LOCATED IN MEDIUM SANDS, DRYWELLS MUST CONTAIN AT LEAST 90 CUBIC FEET OF GRAVEL PER 1,000 SQUARE FEET
OF IMPERVIOUS SURFACE SERVED.
2.SPACING BETWEEN DRYWELLS SHALL BE A MINIMUM OF 10 FEET.
3.REGULAR MAINTENANCE INCLUDING CATCH BASIN (YARD DRAIN) CLEANING (EVERY 6 MONTHS MINIMUM) IS ESSENTIAL TO THE LONG-TERM FUNCTIONING OF
DRYWELLS.
4.CONNECT INLET PIPE TO CONCRETE DRYWELL USING PRECAST HOLE OR CORE DRILLED HOLE.
5.SEE CONSTRUCTION PLANS FOR SPECIFIC PROJECT REQUIREMENTS.
48" MIN. DIA.
SPLASH BLOCK
SECTION
48" MIN.
NOTES:
1.DRYWELLS MUST BE SET BACK AT LEAST 15 FEET FROM
BUILDINGS WITH CRAWL SPACE OR BASEMENT ELEVATIONS THAT
ARE BELOW THE OVERFLOW POINT OF THE DRYWELL.
3/4" - 1 1/2" WASHED
DRAIN ROCK OR
GRAVEL BACKFILL FOR
DRYWELLS PER WSDOT
STD. SPECIFICATION
SECTION 9-03.12(5).
DRYWELL PLAN AND SECTION
STD. PLAN - 263.00
PUBLIC WORKS
DEPARTMENT
APPROVED:
DATEMartin Pastucha
Public Works Administrator
UNLESS OTHERWISE NOTED, DRAWING IS NOT TO SCALE (NTS)
DocuSign Envelope ID: 3B1B34D3-7E0A-476C-ADB3-4329FFE0C108
8/13/2020 | 8:48 AM PDT