HomeMy WebLinkAbout261.20NOTES:
1.UNDERDRAIN AGGREGATE SHALL MEET GRAVEL BACKFILL FOR DRAINS PER WSDOT STD. SPECIFICATION SECTION 9-03.12(4).
2.UNDERDRAIN TO BE 6" MIN. (PRIVATE), 8" MIN. (PUBLIC) SLOTTED PVC, SDR 35 PER ASTM D3034. SLOTS SHOULD BE CUT PERPENDICULAR TO THE LONG AXIS OF THE PIPE
AND BE 0.04 TO 0.069 INCHES BY 1 INCH LONG AND BE SPACED 0.25 INCHES APART (SPACED LONGITUDINALLY). SLOTS SHOULD BE ARRANGED IN FOUR ROWS SPACED ON
45-DEGREE CENTERS AND COVER 1/2 OF THE CIRCUMFERENCE OF THE PIPE. SLOPE PIPE AT 0.5% MIN. UNLESS OTHERWISE SPECIFIED. PROVIDE ONE CLEANOUT MIN.
PER 100 FEET OF UNDERDRAIN, AND AT EACH END. SEE STD. PLAN 226.00.
3.PIPE WILL HAVE A MINIMUM COVER DEPTH OF 12" AND BEDDING DEPTH OF 6".
SEE PERMEABLE
PAVEMENT SECTION
STD. PLAN 261.10
DESIGNER TO SPECIFY
CHECK DAM HEIGHT 3" MIN. KEY
12" MIN.
DESIGNER
TO SPECIFY
DESIGNER TO SPECIFY
SPACING
DESIGNER TO SPECIFY
SPACING
4" MIN.
10% MAX. SLOPE 1" MIN. CHECK DAM
CLEARANCE
1
1
6"
6" MIN. BEDDING
SEE PERMEABLE
PAVEMENT SECTION
STD. PLAN 261.10
10% MAX. SLOPE
1" MIN. CHECK DAM
CLEARANCE
OUTFLOW
SEE PERMEABLE
PAVEMENT SECTION
STD. PLAN 261.10 2" MIN.
12" MIN.
COVER
12" MIN.
12" MIN. SUMP
CONTROLLED DENSITY FILL SUBSURFACE CHECK DAM
12" MIN.
CLEAR
CONCRETE BAND SUBSURFACE CHECK DAM
UNDERDRAIN AND OVERFLOW
CONTROL STRUCTURE WITH RISER
GENERAL NOTES:
1.LOCATE UNDERDRAIN BELOW STRUCTURAL PAVEMENT BASE DEPTH.
2.SEE CONSTRUCTION PLANS FOR SPECIFIC PROJECT REQUIREMENTS.
CONTROLLED DENSITY FILL
SUBSURFACE CHECK DAM PER
WSDOT SECTION 2-09.3(1)E
(TYP.). CHECKDAM REQUIRED
FOR SLOPE STEEPER THAN 5%
COMMERCIAL CONCRETE
SUBSURFACE CHECK DAM PER
WSDOT SECTION 6-02.3(2)B (TYP.).
CHECKDAM REQUIRED FOR
SLOPE STEEPER THAN 5%
DESIGN WATER SURFACE
ELEVATION CONTROLLED
BY OUTLET
CONTROL JOINT (TYP.)
(PERVIOUS CONCRETE ONLY)
SLOTTED UNDERDRAIN,
SEE NOTES 2 AND 3
DESIGN WATER SURFACE
ELEVATION CONTROLLED BY
OUTLET
CONTROL JOINT (TYP.)
(PERVIOUS CONCRETE ONLY)
CLEANOUT PER STD.
PLAN 226.00 WATER LEVEL CONTROLLED BY
OUTLET ELEVATION
OUTLET ELEVATION,
DESIGNER TO SPECIFY
TYPE 1L CATCH BASIN (CB)
PER STD. PLAN 200.10 OR
OTHER STRUCTURE WITH
APPROVAL
UNDERDRAIN AGGREGATE,
SEE NOTE 1
REMOVABLE PLUG
FOR MAINTENANCE
SLOTTED UNDERDRAIN PIPE,
SEE NOTES 2 AND 3
SANITARY TEE
WITH OPTIONAL
RISER PIPE
DESIGNER TO SPECIFY
SUBSURFACE CHECK
DAM HEIGHT 3" MIN. KEY
6" MIN.
BEDDING
SLOTTED UNDERDRAIN,
SEE NOTES 2 AND 3
12" MIN.
COVER
1
1
3' MAX.
SUBGRADE PER
STD. PLAN 261.19
SUBGRADE PER STD. PLAN 261.10
6"
SUBGRADE PER STD. PLAN 261.10
PERMEABLE PAVEMENT - SUBSURFACE
CHECK DAMS AND UNDERDRAIN
STD. PLAN - 261.20
PUBLIC WORKS
DEPARTMENT
APPROVED:
DATEMartin Pastucha
Public Works Administrator
UNLESS OTHERWISE NOTED, DRAWING IS NOT TO SCALE (NTS)
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11/2/2020 | 1:04 PM PST