HomeMy WebLinkAbout260.103/4"-1-1/2"WASHED DRAIN ROCK •/'' 4 1
6'
NON-WOVEN GEOTEXTILE FOR SEPARATION / MIN. 1
PER WSDOT SPECIFICATIONS GEOTEXTILE / ,
FOR SEPARATION SECTION 9-33.2(1)TABLE 3' `4,'WM Ili.
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PLANTING ZONES,
6"MIN
SEE PLANTING NOTES AND PLANTING ZONES TABLE I — • \ .s, .11110 '\I
I 0 1 0 1 1 0 IDI iii
BOTTOM WIDTH J
4.0* /, a WO
EXISTING I 18"MIN. I A
I GROUND 1 1 I I A/ OPTIONAL COMPACTED
6"BIRD CAGE OVERFLOW,NDS 80 OR 6"MIN. EARTH BERM,SEE NOTE 1
EQUAL.SET RIM AT TOP OF PONDING FREEBOARD 2'MIN
tt
6"PONDING— 1..' `l I/.
ell1 '"'' F1 4 MIN
0,,:t...:.4:• 1 J 1%MIN 4%` SLOPE• , S`v./'
PIPED
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CONNECTION a 2 5 MIN. -,
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2qMIN ,;r,-,ti 2"MIN.WASHED IV
OPTIONAL) t';',7.-,'A:=;!:."
y T'''...;;,,"'"=' - r;., •%- .-2 ROUND ROCK
DISPERSION
r
i. 1- t,1 - A TRENCH(TYP.)
2"MIN.WASHED ROUND ROCK.r ', -',A-..".',:, °.'".1-1,,'. -y.
jjjOPTIONAL SURFACE
EXTEND TO 12"BEYOND
45°ELBOW(TYP.) OVERFLOW,SEE NOTE 3—
BOTTOM OF RAIN GARDEN
J/MULCH 3"DEPTH,SEE NOTE 2
MIN.EXCAVATION EXTENT
COMPOST-AMENDED SOILS PER STD PLAN 264.00 OR
BIORETENTION SOIL MEDIA PER THE CITY OF RENTON
SURFACE WATER DESIGN MANUAL REFERENCE SECTION 11-C
SECTION-RAIN GARDEN A
SCALE.NTS 60.00
PLANTING NOTES:NOTES:
1. REFER TO THE RAIN GARDEN HANDBOOK FOR WESTERN WASHINGTON 1. RAISED BERM SHALL BE FIRM,UNDISTURBED,NON-YIELDING NATIVE SOIL OR
FOR GUIDANCE ON PLANT SELECTION SITING AND SPACING BY ZONE. DISTURBED SITE SOILS COMPACTED WITH 12 POUND HAND TAMPER IN 3-INCH
LIFTS.IF SITE SOILS ARE SANDY,CONSIDER IMPORTING DENSER,NON-PERMISSIVE
2. PLANTS MUST BE PERENNIAL AND ADAPTED TO THE CONDITIONS SOILS FOR RAISED BERM.TOP WIDTH SHALL BE 6-INCHES MIN.
ENCOUNTERED IN ITS ZONE IN THE RAIN GARDEN.SEE PLANTING ZONE
TABLE. 2. WOODY MULCH PREFERRED,ROCK MULCH OR BARK CHIP MULCH NOT PERMITTED.
3. EVERGREEN AND DECIDUOUS VEGETATION MAY BE USED BUT THE 3. OVERFLOW TO BE PIPED TO STORM DRAIN SYSTEM PER STD.PLAN 260.00 UNLESS
MAJORITY OF MATERIAL MUST PROVIDE A SIGNIFICANT ABOVE GROUND SURFACE OVERFLOW CAN BE DIRECTED TO A SUITABLE LOCATION AS APPROVED
PRESENCE YEAR ROUND. BY THE CITY.
4. PLANTING DESIGN SHOULD MINIMIZE COMPACTION OF SOIL THROUGH GENERAL NOTES:
PLANNED MAINTENANCE ACCESS.ANNUAL PLANTS REQUIRING SOIL
DISTURBANCE FOR HARVESTING(E.G,CARROTS)OR ANNUAL 1. UNDERDRAINS ARE NOT ALLOWED WITHIN RAIN GARDENS.
REPLANTING ARE NOT PERMITTED.
TABLE: PLANTING ZONES
ZONE PLANT TYPE LOCATION
EMERGENTS,PERENNIALS&LOW SHRUBS
FACILITY BOTTOMPLANTSTHATCANTOLERATESTANDINGWATER)
O EMERGENTS,PERENNIALS&LOW SHRUBS
LOWER SLOPE TO TOP OF PONDINGPLANTSTHATCANTOLERATEOCCASIONALSTANDINGWATER)
OGROUNDCOVERS/SHRUBS UPPER SLOPE/SURFACE GRADE
OOO ACCENT SHRUB
SELECT APPROPRIATE SHRUB BASED ON ZONE) SURFACE GRADE/LOWER SLOPE/FACILITY BOTTOM
O TREE CENTER WITHIN UPPER SLOPE.CONSIDER CANOPY OF FULL-GROWN TREE.
ALLOW CLEARANCE FOR WALKWAYS.
UNLESS OTHERWISE NOTED,DRAWING IS NOT TO SCALE(NTS)
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tv o,, STD. PLAN-260.10
o PUBLIC WORKS ROVED:
DEPARTMENT RAIN GARDEN SECTION
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