HomeMy WebLinkAbout249.10SCALE:
CROSS-SECTION A
249.00NTS
XXEMERGENCY OVERFLOW WS
OVERFLOW WS
WQ DESIGN WS
INLET
EMERGENCY OVERFLOW WS
OVERFLOW WS
WQ DESIGN WS
NOTES:
1.THIS DETAIL IS A SCHEMATIC REPRESENTATION ONLY. ACTUAL CONFIGURATION WILL VARY DEPENDING ON SPECIFIC SITE CONSTRAINTS
AND APPLICABLE DESIGN CRITERIA.
2.ACCESS ROAD AND RAMP SHALL MEET REQUIREMENTS IN STD. PLAN 234.50.
3.SIDE SLOPES (INTERIOR AND EXTERIOR) SHALL NOT BE STEEPER THAN THREE (3) FEET HORIZONTAL TO ONE (1) FOOT VERTICAL.
4.OPEN PONDS SHALL NOT BE LOCATED IN DEDICATED PUBLIC RIGHT-OF-WAY.
5.EXPOSED EARTH ON THE POND BOTTOM AND INTERIOR SIDE SLOPES SHALL BE SODDED OR SEEDED WITH AN APPROPRIATE SEED
MIXTURE PER SECTION 5.1.1.1 OF THE CITY OF RENTON SURFACE WATER DESIGN MANUAL (RENTON SWDM). ALL REMAINING AREAS OF
THE TRACT MUST EITHER BE PLANTED WITH GRASS, OR BE LANDSCAPED IN ACCORDANCE WITH LANDSCAPING REQUIREMENTS INCLUDED
IN SECTION 6.4.1.2 OF THE RENTON SWDM.
6.LANDSCAPING, TREES, POND GEOMETRY AND FENCING STANDARDS ARE SPECIFIED IN STANDARD PLAN 234.40.
7.WETPONDS WITH WETPOOL VOLUMES LESS THAN OR EQUAL TO 4,000 CUBIC FEET MAY BE SINGLE-CELLED (I.E. NO BAFFLE OR BERM IS
REQUIRED).
8.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.
9.SEE CONSTRUCTION PLANS FOR SPECIFIC PROJECT REQUIREMENTS.
SLOPE VEGETATION PER
DETENTION FACILITY
REQUIREMENTS
EMERGENT VEGETATION
REQUIRED FOR WETPOOL
DEPTHS 3' OR LESS
KEYED BERM
IF TOP OF BERM IS SUBMERGED 1' BELOW WQ
DESIGN WS, BERM SIDE SLOPES MAY BE 2H:1V,
OTHERWISE SIDE SLOPES MUST BE 3H:1V
INLET EROSION CONTROL/SLOPE
PROTECTION PER DETENTION
FACILITY REQUIREMENTS
2' MIN.
SEDIMENT STORAGE
DEPTH, 12" MIN.
FIRST CELL DEPTH
4' MIN. TO 8' MAX.
WETPOOL FLOW LENGTH = 3 MIN. x WIDTH
WETPOOL DEPTH 8' MAX. RECIRCULATION
RECOMMENDED FOR DEPTH > 6'
SEE STD. PLAN 234.40 FOR
FENCE REQUIREMENTS
ACCESS ROAD
CAPACITY OF OUTLET SYSTEM
SIZED TO PASS PEAK FLOW FOR
CONVEYANCE REQUIREMENTS
EXTERIOR BERMS DESIGNED PER
DAM SAFETY REQUIREMENTS
IF APPLICABLE
MANHOLE OR TYPE 2
CATCH BASIN
VALVE
(MAY BE LOCATED INSIDE MH
OR OUTSIDE WITH APPROVED
OPERATIONAL ACCESS)
GRAVITY DRAIN
(IF GRADE ALLOWS)
8" MIN. DIAMETER
INVERT 6" MIN. BELOW TOP OF
INTERNAL BERM. LOWER
PLACEMENT IS DESIRABLE
12" MIN
18" MIN.
SCALE:
CROSS-SECTION B
249.00NTS
6" SEDIMENT STORAGE
COMPACT TO 95% OF MAXIMUM
DRY DENSITY
OUTLET PIPE INVERT AT
WETPOOL WS ELEVATION
SEE NOTE 8 (TYP.)
TOP OF BERM OR BAFFLE TO BE LEVEL
AND AT OR 1' BELOW WATER QUALITY
(WQ) DESIGN WATER SURFACE (WS)
INLET SUBMERGED 12" MIN.
TYPICAL WETPOND SECTIONS
STD. PLAN - 249.10
PUBLIC WORKS
DEPARTMENT
APPROVED:
DATEGregg Zimmerman
Public Works Administrator
UNLESS OTHERWISE NOTED, DRAWING IS NOT TO SCALE (NTS)
3
1
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9/28/2018 | 9:45 AM PDT