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IMPERVIOUS AREAS:
7 37p.67
PAINT-SPoT
PROJECT SITE CATEGORY: CATEGORY 2
DISCHARGE LOCATION: CITY'S MS4
TYPE OF
STORMWATER
SQUARE FOOTAGE
AREA
FACILITY
LAWN AND
18,146
INFILTRATING
LANDSCAPE
TRENCHES (ITS)
ROOF
2415
ITS
HARD SURFACES
4564
ITS
APPROVED FOR CONSTRUCTION
CITY OF EDMONDS
DATE:
M.
CITY ENGINEERING DIVISION
- - PROPERTY LINE/ROW
CENTERLINE
290 FINISHED GRADE CONTOUR
292
- 296 EXISTING GRADE CONTOUR
INFILTRATING TRENCH (IT)
sn STORM PIPE (SD)
- - - - - - - - WALL DRAIN (WD)
TRENCH DRAIN (TD)
• CLEANOUT (CO)
❑• CATCH BASIN/AREA DRAIN (CB/AD)
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0
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OVERFLOW PATH
CONCRETE
PERMEABLE PAVEMENT
ASPHALT
LANDSCAPE
1. TRENCH DRAIN SHALL BE ACO KLASSIKDRAIN K100 OR
APPROVED EQUIVALENT. PRODUCT SHALL HAVE A 4"
INTERNAL WIDTH AND BUILT IN SLOPE OF 0.5% MINIMUM.
COORDINATE WITH ARCHITECT FOR GRATE SELECTION. INCLUDE
INLINE CATCH BASIN AND EXIT FROM LOWEST INVERT ON
NORTH FACE OR EAST FACE, AS SHOWN ON PLANS.
2. MAINTAIN CONSISTENT SLOPE BETWEEN INVERT ELEVATIONS
PROVIDED.
3. BURY CLEANOUTS 6" DEEP WHEN LOCATED IN LANDSCAPE.
CLEANOUT IN HARDSCAPE SHALL BE JR SMITH 4220, OR
APPROVED EQUIVALENT.
4. MAINTAIN 2 MINIMUM COVER AND 1.0% MINIMUM SLOPE FOR
4" DOWNSPOUT CONNECTIONS, UNLESS NOTED OTHERWISE.
MAINTAIN 1' MINIMUM COVER OVER 6" SD PIPES IN
LANDSCAPE AND 2' UNDER DRIVEABLE SURFACES, UNLESS
OTHERWISE NOTES.
5. CONTRACTOR SHALL COORDINATE FILL PLACEMENT AND
COMPACTION WITH PROJECT GEOTECHNICAL ENGINEER.
6. IF STRUCTURE RIM TO INVERT ELEVATION EXCEEDS 5-FEET, A
TYPE II MANHOLE WILL BE REQUIRED.
7. ALL STORM DRAINS SHALL BE ADS N12 WT IB PIPE OR
APPROVED EQUIVALENT.
8. Provide impermeable trench dam (CDF, clay, etc.) to prevent
drainage migration through trench/pipe bedding material surrounding
solid pipe
Call 811
• = two business days
before you dig
0 5' 10' 20'
EMMW
1 inch = 10 feet
2 liidhwll Md i
!Mcd
1601 5th Avenue, Suite 1600
Seattle, WA 98101
206.622.5822
www.kpff.com
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A 79 4 1-12-07
�SSIONAL EgG
DATE: December 7, 2021
JOB NO: 2100167
DESIGNED BY: SB
DRAWN BY: JEP/KA
CHECKED BY: JC
APPROVED BY: JC
DRAINAGE & GRADING
PLAN