HomeMy WebLinkAbout262.40NOTES:
1.FRAME AND GRATE SHALL BE LOCKING AND GRATE SHALL BE BOLTED TO FRAME. FRAME SHALL CONFORM TO WSDOT STANDARD PLAN
B-30.10-03. GRATE TO BE DUCTILE IRON BEEHIVE GRATE FITTING 20"x24" FRAME. OLYMPIC FOUNDRY PART SM60BH OR EQUAL. SEE
STANDARD SPECIFICATIONS 9-05.15(2).
2.MINIMUM STREAMBED COBBLE DIAMETER SHALL BE LARGER THAN MAXIMUM GRATE OPENING.
3.ALL GRADE RINGS AND CASTINGS SHALL BE SET IN MORTAR IN ACCORDANCE WITH STANDARD SPECIFICATION 9-04.3. THEN APPLY
MORTAR TO INSIDE AND OUTSIDE OF ALL JOINTS, RINGS, RISERS, AND FRAMES.
4.WHEN CONNECTING TO A NEW PIPE, USE A FLEXIBLE CONNECTOR (KOR-N-SEAL BOOT WITH CORRUGATED PIPE ADAPTER OR APPROVED
EQUAL). WHEN CONNECTING TO AN EXISTING PIPE, USE A FABRICATED SAND COLLAR OF THE SAME MATERIAL AS THE CONNECTING PIPE.
6" MIN.
CAST IRON BEEHIVE GRATE
AND FRAME, SEE NOTE 1
CATCH BASIN TYPE 1 PER
STD. PLAN 200.00 OR OTHER
STRUCTURE WITH APPROVAL
CATCH BASIN ADJUSTMENT SECTION AS
REQUIRED, DESIGNER TO SPECIFY ELEVATION
12" MIN. SUMP
6" MIN.
6" MIN.
VARIES, 5' MAX.
CONCRETE BASE
DESIGN PONDING
ELEVATION
GRAVEL BACKFILL FOR DRAINS,
COMPACT PER WSDOT STD. SPEC . 9-03.12(4)
STORM DRAIN PIPE,
DESIGNER TO SPECIFY
SEE NOTE 4 (TYP.)
UNDERDRAIN PIPE, IF REQUIRED,
SEE STD. PLAN 262.10
OPTIONAL 6" OR 8" STREAMBED COBBLES,
PER WSDOT 9-03.11(2), SEE NOTE 2
SEE NOTE 3
GENERAL NOTES:
1.PLANT SPACING WITHIN FACILITY TO ALLOW MAINTENANCE ACCESS TO STRUCTURE.
2.12-INCH MIN. CLEARANCE WITHIN OVERFLOW STRUCTURE SHALL BE PROVIDED FOR MAINTENANCE ACCESS.
3.OVERFLOW PIPES MUST BE LOCATED AT AN ELEVATION HIGHER THAN THE STORM DRAIN HYDRAULIC GRADE LINE TO PREVENT BACKFLOW
INTO THE BIORETENTION FACILITY.
4.OVERFLOW STRUCTURE SHALL BE LOCATED WITHIN 10 FEET OF ROAD EDGE FOR MAINTENANCE ACCESS, UNLESS APPROVED OTHERWISE.
OVERFLOW STRUCTURE MAY BE LOCATED IN SIDE SLOPES.
5.SEE CONSTRUCTION PLANS FOR SPECIFIC PROJECT REQUIREMENTS.
BIORETENTION - OVERFLOW OUTLET
STRUCTURE
STD. PLAN - 262.40
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