C-1 STORMWATER MANAGEMENT CONCEPT PLAN Montgomery County Department of Parks 9500 Brunett Avenue Silver Spring, Maryland 20901 (301) 495-2535 The Maryland-National Capital Park and Planning Commission ISSUED FOR PROCUREMENT ON___________________ REVISIONS Professional Certification. I hereby certify that these documents were prepared or approved by me, and that I am a duly licensed professional engineer under the laws of the State of Maryland. License No._________________________________ Expiration Date______________________________ ________________________________________________ Designer's Name ________________________________________________ Address ________________________________________________ City/State/Zip ________________________________________________ Telephone Number DESIGN Landscape Architect Date Checked By: Architect Date Checked By: Engineer Date Checked By: Drawn by Date Checked By: Rev. No. Date Description SCALE: AS SHOWN REVIEW AND APPROVAL Project Manager Date Construction Manager Date Park Manager Date DAVE NORDEN 1775 GREENSBORO STATION PLACE, SUITE 110 TYSONS, VIRGINIA, 22102 703-821-2045 LSG LANDSCAPE ARCHITECTURE CLARK | AZAR & ASSOCIATES 2/6/19 DC SL, ME 2/6/19 DC Silver Spring Intermediate Neighborhood Park DWG. # ____ of ____ SHT. # ____ of ____ 31168 01/12/2021 2/6/19 0 0 20' 40' GRAPHIC SCALE
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C-1
STORMWATER MANAGEMENT CONCEPT PLAN
Montgomery County Department of Parks9500 Brunett Avenue
Silver Spring, Maryland 20901(301) 495-2535
The Maryland-National CapitalPark and Planning Commission
ISSUED FOR PROCUREMENT ON___________________
REVISIONS
Professional Certification. I hereby certify that thesedocuments were prepared or approved by me, andthat I am a duly licensed professional engineer underthe laws of the State of Maryland.
License No._________________________________
Expiration Date______________________________
________________________________________________ Designer's Name
________________________________________________ Address
________________________________________________ City/State/Zip
________________________________________________ Telephone Number
DESIGN
Landscape Architect Date Checked By:
Architect Date Checked By:
Engineer Date Checked By:
Drawn by Date Checked By:
Rev. No. Date Description
SCALE: AS SHOWN
REVIEW AND APPROVAL
Project Manager Date
Construction Manager Date
Park Manager Date
DAVE NORDEN
1775 GREENSBORO STATION PLACE, SUITE 110
TYSONS, VIRGINIA, 22102
703-821-2045
LSG LANDSCAPE ARCHITECTURE
CLARK | AZAR & ASSOCIATES 2/6/19 DC
SL, ME 2/6/19 DC
Silver Spring IntermediateNeighborhood Park
DWG. # ____ of ____
SHT. # ____ of ____31168
01/12/20212/6/19
00 20' 40'
GRAPHIC SCALE
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319.3'
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312.0'
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310.6'
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305.4'
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306.2'
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306.5'
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306.8'
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BUS STOP
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NO PARKING
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XWALK
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SS INT PARK
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25MPH
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LEASH LAW
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LEASH LAW
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PARK PATRONS ONLY
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PARK PATRONS ONLY
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NO PARKING
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PERMIT PARKING
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PERMIT PARKING
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NO PARKING
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NO PARKING
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LEASH LAW
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LEASH LAWS
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LEASH LAW
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STOP
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NO PARKING
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NO PARKING
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PERMIT PARKING
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NO PARKING
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LEASH LAW
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C
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BENCH
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8' CHAIN LINK FENCE
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8' CHAIN LINK FENCE
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ASPHALT BASKETBALL COURT
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CONC. WALK
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ASPHALT WALK
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320.71'
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320.07'
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323.05'
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TIMBER WALL
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CINDER BLOCK WALL W/ METAL RAILING
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CONC. (V) CHANNEL
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304.61'
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305.68'
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303.80'
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TW:317.20'
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TW:315.20'
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TW:320.80'
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TW:319.36'
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#610 BOSTON AVENUE BREGSTONE PHILIP S & ROBERTA P LIBER 18236, FOLIO 565 PART OF LOT 12, BLOCK 68 T.P.L & T.Co. SUBDIVISION PLAT No. B-23
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#613 PHILADELPHIA AVENUE SLOAN, CHERYL A LIBER 9630, FOLIO 23 LOT 2A, BLOCK 68 T.P.L & T.Co. SUBDIVISION PLAT No. 2970
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316.21'
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312.33'
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307.75'
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CONC. WALK
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308.60'
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310.21'
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310.33'
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311.94'
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313.24'
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315.67'
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315.87'
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318.01'
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ELEC. HATCH
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318.55'
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TRANSFORMER
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STOP BAR
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MULCH PLAYGROUND AREA
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CONC. SIDEWALK
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CONC. SIDEWALK
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319.64'
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316.58'
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314.83'
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315.4'
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313.4'
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CONC. SIDEWALK
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CONC. SIDEWALK
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CONC. SIDEWALK
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CONC. SIDEWALK
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TW:309.46'
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TW:307.46'
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308.2'
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308.6'
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306.5'
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306.6'
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ASPHALT SIDEWALK
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318.48' 317.98'
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319.09' 318.59'
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317.64' 317.14'
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316.20' 315.70'
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315.57' 315.07'
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315.1' 314.6'
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315.21' 314.71'
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315.17' 314.67'
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315.10' 314.60'
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316.02' 315.52'
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318.47' 317.97'
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320.39' 319.89'
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313.94'
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314.60'
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ASPHALT PARKING LOT
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324.08'
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CONC. CURB & GUTTER
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CONC. CURB & GUTTER
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CONC. CURB & GUTTER
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CONC. CURB & GUTTER
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CONC. CURB & GUTTER
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CONC. CURB & GUTTER
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TW:320.9'
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319.5'
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319.79'
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320.8'
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320.5'
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319.20'
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318.30'
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319.35'
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LOT 7 PLAT 27
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CHAIN LINK FENCE
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ASPHALT TENNIS COURT
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CONC. CURB & GUTTER
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CONC. CURB & GUTTER
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CONC. CURB & GUTTER
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CONC. CURB & GUTTER
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RUBBER/ASPHALT
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WALK
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SPEED BUMP
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BUS STOP
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BENCH
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320.95'
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322.78'
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321.50'
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318.79'
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314.87'
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305.52'
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302.40'
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320.96'
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GRASS AREA
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GRASS AREA
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10' CHAIN LINK FENCE
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10' CHAIN LINK FENCE
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320.7'
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314.6'
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312.2'
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C
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C
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W/V
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CONC. WALL
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CONC. BANK
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CONC. WALL
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CONC. BANK
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310.48'
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309.75'
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309.45'
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310.11'
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310.66'
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WM
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XWALK AHEAD
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TOP INLET=322.9' 18" RCP SE INV. IN=317.8' 24" RCP NE INV. OUT=314.2'
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TOP GRATE INLET=314.6' 12" RCP NE INV. IN=307.6' 4'X6' BOX NW INV. IN=306.4' 12" RCP SW INV. IN=311.4' 4X6' BOX CULVERT SE INV. OUT=306.2'
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TOP INLET=313.4' 12" RCP SE INV. OUT=311.4'
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TOP GRATE INLET=305.7' 4" PVC N INV. IN=304.7' 4'X6' BOX CULVERT NW INV. IN=296.5' 4" PVC SW INV. IN=303.2' 36" RCP NE INV. OUT=296.3'
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TOP GRATE INLET=306.9' 36" RCP SW INV. IN=293.7' 36" RCP SE INV. OUT=293.6'
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FRAME SHED
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BRICK WALL
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CONC. DRIVE
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18" RCP
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24" RCP
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36" RCP
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4'X6' BOX CULVERT
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BENCH
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36" RCP
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POSSIBLE FIELD CONNECTION
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12" RCP
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4'X6' BOX CULVERT
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4'X6' BOX CULVERT
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33" RCCPX
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TOP MANHOLE=304.9' 15" RCP NW INV. IN=300.7' 15" RCP N INV. OUT=295.8'
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TOP GRATE INLET=312.7' *ABANDONED* 10" DIP SE INV. OUT=311.7'
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INV. 15" RCP IN=301.7'
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307.64'
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307.42'
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309.04'
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308.93'
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3' GATE
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13' GATE
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TIMEBER WALL
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TW:317.86'
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CONC. DRIVE
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24" RCP
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4" PVC
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4" PVC
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TOP METAL HATCH=310.8' 12" RCP (FILLED W/DEBRIS) N INV. IN=304.3' 4'X6' BOX CULVERT NW INV. IN=299.0' 24" RCP SW INV. IN=301.3' 3.0'X5.5' BOX SE INV. OUT=298.8'
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WOOD FENCE
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307.8'
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307.0'
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306.9'
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306.7'
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309.6'
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310.0'
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309.1'
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308.8'
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309.4'
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308.5'
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307.79'
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312.52'
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316.50'
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TRASH CAN
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320.43'
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TW:317.45'
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TW:317.45'
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324
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323
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322
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321
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320
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320
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319
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318
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317
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316
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315
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314
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313
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312
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311
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310
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309
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308
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307
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306
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305
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304
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303
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302
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301
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300
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299
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298
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TW:304.82'
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METAL RAILING
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BENCH
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TW:304.82'
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PICNIC TABLE
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PICNIC TABLE
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INF #1
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SB #1
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SB #2
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SB #3
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INF #3
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INF #2
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PARK CODE: C10
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PLAN SCANNED:
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FINAL SCANNED:
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J:\145.002 - Silver Spring Intermediate Park\CAD\CONCEPTS\C-1 - Stormwater Management Concept.dwg C-1 Plotted By: Matt Edelman, 2/6/2019 5:43 PM, ---- C-1 Plotted By: Matt Edelman, 2/6/2019 5:43 PM, ----C-1 Plotted By: Matt Edelman, 2/6/2019 5:43 PM, ---- Plotted By: Matt Edelman, 2/6/2019 5:43 PM, ----Matt Edelman, 2/6/2019 5:43 PM, ----, 2/6/2019 5:43 PM, ----2/6/2019 5:43 PM, ----, --------
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STORMWATER MANAGEMENT CONCEPT LEGEND
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PROPOSED LIMITS OF DISTURBANCE
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PROPOSED CONCRETE
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PROPOSED MILL AND OVERLAY
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PROPOSED FLEXI-PAVE
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PROPOSED MICRO-BIORETENTION AREA "MBR-A" SURFACE AREA = 500 SF
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PROPOSED ADA PARKING SPACE
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RELOCATED PORTA-JOHN ON CONCRETE PAD WITH SCREENING FENCE
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PROPOSED RISER STRUCTURE "R-1" RIM = 313.0 INV. IN = 307.5 INV. OUT = 307.4
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CONVERT EXISTING GRATE INLET TO MANHOLE INV. IN 12" HDPE = 306.4
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PROPOSED SIDEWALK FLUME
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P-1 12" HDPE
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P-2
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12" HDPE
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P-3
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18" HDPE
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PROPOSED DRAINAGE SWALE TO DIRECT RUNOFF TOWARDS EXISTING CONCRETE SWALE
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PROPOSED FLEXI-PAVE WALKWAY, 6' WIDE TYP.
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EXISTING NATURAL GRASS PLAY AREA NOT TO BE DISTURBED
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EXISTING TENNIS COURT TO BE RESURFACED AND RESTRIPED
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EXISTING BASKETBALL COURT TO REMAIN
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PROPOSED ADA RAMP SYSTEM
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PROPOSED CONCRETE WALKWAY, TYP.
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PROPOSED RETAINING WALL
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EXISTING RETAINING WALL TO BE REPAIRED AND RAILING TO BE REPLACED
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PROPOSED BENCHES, TYP.
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PROPOSED ELEVATED WALKWAY BRIDGE
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EXISTING RETAINING WALL TO BE REPLACED
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EXISTING CONCRETE SWALE TO HAVE ALL DEBRIS AND VEGETATION CLEARED AND REMOVED
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REPLACE EXISTING RISER WITH THROAT OPENING RIM = 305.0 THROAT OPENING = 304.0 INV. IN = 297.0 INV. OUT = 295.8
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PROPOSED MICRO-BIORETENTION AREA "MBR-B" SURFACE AREA = 614 SF
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PROPOSED RISER STRUCTURE "R-2" RIM = 303.0 INV. IN = 297.5 INV. OUT = 297.4
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PROPOSED DOGHOUSE MANHOLE MH-1 OVER EXISTING 36" RCP STORMDRAIN RIM = 299.0 INV. IN = 291.2 INV. IN (18" HDPE) = 292.0 INV. OUT = 291.1
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PROPOSED LIMITS OF DISTURBANCE = 88,425 SF
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PROPOSED MICRO-BIORETENTION AREA
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SB-1
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GENERAL NOTES OWNER: BOARD OF EDUCATION BOARD OF EDUCATION 850 HUNGERFORD DRIVE ROCKVILLE, MD 20850 1. WSSC MAP GRID: 209NW01 WSSC MAP GRID: 209NW01 2. TAX MAP: JN-32 TAX MAP: JN-32 3. ZONING: R-60 ZONING: R-60 4. ELECTION DISTRICT: 13 ELECTION DISTRICT: 13 5. TOPOGRAPHY SURVEY PERFORMED BY POTOMAC VALLEY SURVEYS TOPOGRAPHY SURVEY PERFORMED BY POTOMAC VALLEY SURVEYS OCTOBER 2018 AND SUPPLEMENTED BY MONTGOMERY COUNTY GIS DATA. 6. THE LOCATION OF UNDERGROUND UTILITIES ARE SHOWN THE LOCATION OF UNDERGROUND UTILITIES ARE SHOWN APPROXIMATE IN NATURE AND PER AVAILABLE PLANS. ABOVE GROUND UTILITIES & IMPROVEMENTS FIELD LOCATED BY POTOMAC VALLEY SURVEYS. INVERT ELEVATIONS HAVE BEEN OBTAINED WHERE ACCESS IS AVAILABLE. ALL CONTRACTORS MUST CALL "MISS UTILITY" PRIOR TO ANY EXCAVATIONS. 7. NRCS WEB SOIL SURVEY IDENTIFIES SOILS AT THIS SITE AS GAILA NRCS WEB SOIL SURVEY IDENTIFIES SOILS AT THIS SITE AS GAILA SILT LOAM, GLENELG-URBAN LAND COMPLEX, AND BRINKLOW-BLOCKTOWN CHANNERY SILT LOAMS. 8. THERE IS NO MAPPED FLOODPLAIN ASSOCIATED WITH THIS SITE THERE IS NO MAPPED FLOODPLAIN ASSOCIATED WITH THIS SITE PER FEMA FLOOD INSURANCE RATE MAP NUMBER 24031C0460D, DATED SEPTEMBER 29, 2006.
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VICINITY MAP SCALE: 1" = 1000'
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PHILADELPHIA AVENUE
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SOIL BORING/INFILTRATION TEST LOCATION
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CHICAGO AVENUE
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FENTON STREET
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RITCHIE
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SLIGO AVENUE
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AVENUE
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PROPOSED ASPHALT MILL AND WEDGE OVERLAY
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PROPOSED CONCRETE WALKWAY, TYP.
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PROPOSED BIKE RACKS ON CONCRETE PAD, TYP.
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PROPOSED BENCH ON CONCRETE PAD, TYP.
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EXISTING MULCH PLAYGROUND AREA TO REMAIN
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PROPOSED LANDSCAPE BOULDERS, TYP.
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PROPOSED CONCRETE SLAB FOR PICNIC TABLES
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P-4
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8" HDPE
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12" NYLOPLAST IN-LINE DRAIN W/DOME GRATE RIM = 318.5 INV. OUT = 315.5
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TIE-INTO EXISTING 24" RCP STORMDRAIN WITH INSERT-A-TEE. CONTRACTOR TO PROVIDE ALL FITTINGS AND ADAPTERS AS NECESSARY TO PROVIDE WATERTIGHT CONNECTION. INV. IN = 312.71
C-2
STORMWATER MANAGEMENT CONCEPT DETAILS
Montgomery County Department of Parks9500 Brunett Avenue
Silver Spring, Maryland 20901(301) 495-2535
The Maryland-National CapitalPark and Planning Commission
ISSUED FOR PROCUREMENT ON___________________
REVISIONS
Professional Certification. I hereby certify that thesedocuments were prepared or approved by me, andthat I am a duly licensed professional engineer underthe laws of the State of Maryland.
License No._________________________________
Expiration Date______________________________
________________________________________________ Designer's Name
________________________________________________ Address
________________________________________________ City/State/Zip
________________________________________________ Telephone Number
DESIGN
Landscape Architect Date Checked By:
Architect Date Checked By:
Engineer Date Checked By:
Drawn by Date Checked By:
Rev. No. Date Description
SCALE: AS SHOWN
REVIEW AND APPROVAL
Project Manager Date
Construction Manager Date
Park Manager Date
DAVE NORDEN
1775 GREENSBORO STATION PLACE, SUITE 110
TYSONS, VIRGINIA, 22102
703-821-2045
LSG LANDSCAPE ARCHITECTURE
CLARK | AZAR & ASSOCIATES 2/6/19 DC
SL, ME 2/6/19 DC
Silver Spring IntermediateNeighborhood Park
DWG. # ____ of ____
SHT. # ____ of ____31168
01/12/20212/6/19
00 40' 80'
GRAPHIC SCALE
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319.3'
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312.0'
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310.6'
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305.4'
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306.2'
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306.5'
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306.8'
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C
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BENCH
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8' CHAIN LINK FENCE
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8' CHAIN LINK FENCE
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ASPHALT BASKETBALL COURT
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CONC. WALK
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ASPHALT WALK
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320.71'
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320.07'
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323.05'
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TIMBER WALL
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CINDER BLOCK WALL W/ METAL RAILING
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CONC. (V) CHANNEL
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304.61'
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305.68'
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303.80'
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TW:317.20'
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TW:315.20'
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TW:320.80'
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TW:319.36'
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#610 BOSTON AVENUE BREGSTONE PHILIP S & ROBERTA P LIBER 18236, FOLIO 565 PART OF LOT 12, BLOCK 68 T.P.L & T.Co. SUBDIVISION PLAT No. B-23
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#613 PHILADELPHIA AVENUE SLOAN, CHERYL A LIBER 9630, FOLIO 23 LOT 2A, BLOCK 68 T.P.L & T.Co. SUBDIVISION PLAT No. 2970
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316.21'
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312.33'
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307.75'
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CONC. WALK
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308.60'
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310.21'
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310.33'
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311.94'
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313.24'
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315.67'
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315.87'
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318.01'
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ELEC. HATCH
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318.55'
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TRANSFORMER
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STOP BAR
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MULCH PLAYGROUND AREA
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CONC. SIDEWALK
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CONC. SIDEWALK
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319.64'
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316.58'
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314.83'
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315.4'
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313.4'
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CONC. SIDEWALK
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CONC. SIDEWALK
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CONC. SIDEWALK
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CONC. SIDEWALK
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TW:309.46'
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TW:307.46'
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308.2'
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308.6'
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306.5'
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306.6'
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ASPHALT SIDEWALK
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313.94'
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314.60'
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ASPHALT PARKING LOT
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324.08'
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CONC. CURB & GUTTER
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CONC. CURB & GUTTER
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CONC. CURB & GUTTER
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CONC. CURB & GUTTER
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CONC. CURB & GUTTER
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CONC. CURB & GUTTER
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TW:320.9'
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319.5'
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319.79'
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320.8'
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320.5'
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319.20'
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318.30'
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319.35'
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LOT 7 PLAT 27
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CHAIN LINK FENCE
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ASPHALT TENNIS COURT
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CONC. CURB & GUTTER
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CONC. CURB & GUTTER
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CONC. CURB & GUTTER
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RUBBER/ASPHALT
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WALK
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SPEED BUMP
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BUS STOP
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BENCH
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320.95'
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322.78'
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321.50'
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318.79'
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314.87'
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305.52'
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302.40'
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320.96'
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GRASS AREA
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GRASS AREA
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10' CHAIN LINK FENCE
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10' CHAIN LINK FENCE
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320.7'
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314.6'
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312.2'
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C
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C
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W/V
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CONC. WALL
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CONC. BANK
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CONC. WALL
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CONC. BANK
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310.48'
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309.75'
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309.45'
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310.11'
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310.66'
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WM
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FRAME SHED
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BRICK WALL
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CONC. DRIVE
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BENCH
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307.64'
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307.42'
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309.04'
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308.93'
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3' GATE
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13' GATE
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TIMEBER WALL
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TW:317.86'
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CONC. DRIVE
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WOOD FENCE
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307.8'
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307.0'
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306.9'
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306.7'
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309.6'
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310.0'
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309.1'
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308.8'
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309.4'
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308.5'
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307.79'
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312.52'
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316.50'
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TRASH CAN
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320.43'
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TW:317.45'
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TW:317.45'
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328
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327
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326
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325
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325
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321
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320
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320
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318
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307
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305
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TW:304.82'
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METAL RAILING
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BENCH
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TW:304.82'
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PICNIC TABLE
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PICNIC TABLE
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PARK CODE: C10
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PLAN SCANNED:
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FINAL SCANNED:
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J:\145.002 - Silver Spring Intermediate Park\CAD\CONCEPTS\C-1 - Stormwater Management Concept.dwg C-2 Plotted By: Matt Edelman, 2/6/2019 5:43 PM, ---- C-2 Plotted By: Matt Edelman, 2/6/2019 5:43 PM, ----C-2 Plotted By: Matt Edelman, 2/6/2019 5:43 PM, ---- Plotted By: Matt Edelman, 2/6/2019 5:43 PM, ----Matt Edelman, 2/6/2019 5:43 PM, ----, 2/6/2019 5:43 PM, ----2/6/2019 5:43 PM, ----, --------
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POST-DEVELOPMENT DRAINAGE AREA MAP SCALE: 1" = 40'
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DA-1
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DA-2
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3" DOUBLE SHREDDED AGED HARDWOOD MULCH
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SOIL FILTER
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PLANTING SOIL
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1
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3
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PERLITE
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1
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3
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COMPOST
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1
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3
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TOPSOIL
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15" GRAVEL - MDOT-SHA #7 STONE
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6"-ASTM C 33 WASHED CONCRETE SAND
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CLEANOUT W/ WATERTIGHT REMOVEABLE CAP
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6" SCH. 40 PERF. PVC @ 0.00%
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6" NON-PERF. PVC
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UNCOMPACTED SUBGRADE
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NOTES: 1. UNDERDRAIN PIPE SHALL BE PERFORATED WITH 3/8" DIA. PERFORATIONS, UNDERDRAIN PIPE SHALL BE PERFORATED WITH 3/8" DIA. PERFORATIONS, 6" O.C., EVERY 90 DEGREES AROUND THE PIPE. 2. PERFORATED PIPE MUST BE AT LEAST 12" INSIDE THE FILTER MEDIA. PERFORATED PIPE MUST BE AT LEAST 12" INSIDE THE FILTER MEDIA. 3. FILTER FABRIC MUST NOT BE WRAPPED AROUND THE UNDERDRAIN PIPE.FILTER FABRIC MUST NOT BE WRAPPED AROUND THE UNDERDRAIN PIPE.NOT BE WRAPPED AROUND THE UNDERDRAIN PIPE. BE WRAPPED AROUND THE UNDERDRAIN PIPE.
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10-YR WSEL
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3:1 MAX
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3:1 MAX
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12" PONDING
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2' MIN.
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3:1 MAX
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OVERFLOW TO BE MD-SHA PRECAST SINGLE WR INLET (STD MD-374.23)
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EL. "C"
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TYPICAL MICRO-BIORETENTION DETAIL
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1
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NOT TO SCALE
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DO NOT PERFORATE SECTION OF PIPE GOING INTO RISER
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SAND SPECIFICATIONS: WASHED ASTM C33 FINE AGGREGATE CONCRETE SAND IS UTILIZED FOR STORMWATER MANAGEMENT APPLICATIONS IN THE CITY OF ROCKVILLE. IN ADDITION TO THE ASTM C33 SPECIFICATION, SAND MUST MEET ALL OF THE FOLLOWING CONDITIONS: 1. SAND MUST MEET GRADATION REQUIREMENTS FOR ASTM C-33 FINE SAND MUST MEET GRADATION REQUIREMENTS FOR ASTM C-33 FINE AGGREGATE CONCRETE SAND. AASHTO M-6 GRADATION IS ALSO ACCEPTABLE. 2. SAND MUST BE SILICA BASED NO LIMESTONE BASED PRODUCTS MAY SAND MUST BE SILICA BASED NO LIMESTONE BASED PRODUCTS MAY NO LIMESTONE BASED PRODUCTS MAY BE USED. IF THE MATERIAL IS WHITE OR GRAY IN COLOR, IT IS PROBABLY NOT ACCEPTABLE. 3. SAND MUST BE CLEAN. NATURAL, UNWASHED SAND DEPOSITS MAY SAND MUST BE CLEAN. NATURAL, UNWASHED SAND DEPOSITS MAY NOT BE USED. LIKEWISE, SAND THAT HAS BECOME CONTAMINATED BY SAND THAT HAS BECOME CONTAMINATED BY IMPROPER STORAGE OR INSTALLATION PRACTICES WILL BE REJECTED. 4. MANUFACTURED SAND OR STONE DUST IS NOT ACCEPTABLE UNDER MANUFACTURED SAND OR STONE DUST IS NOT ACCEPTABLE UNDER ANY CIRCUMSTANCE.
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MIN. EMBANKMENT EL. "A"
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EL. "D"
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EL. "E"
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EL. "F"
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EL. "G"
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EL. "B"
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MIRAFI 140N FILTER FABRIC ON SIDES ONLY
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6" PVC SCH 40
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4 - 3/8" DIA. OPENINGS, AT 6" ON CENTER
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90
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PIPE PERFORATION DETAIL
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2
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NOT TO SCALE
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LOD AREA: TOTAL AREA = 88,425 SF (2.030 AC) PERVIOUS AREA = 76,315 SF (1.752 AC) IMPERVIOUS AREA = 12,110 SF (0.278 AC) PERCENT IMPERVIOUS = 13.7% DRAINAGE AREA (DA-1): TOTAL AREA = 17,277 SF (0.397 AC) PERVIOUS AREA = 7,169 SF (0.165 AC) IMPERVIOUS AREA = 10,108 SF (0.232 AC) PERCENT IMPERVIOUS = 58.5% DRAINAGE AREA (DA-2): TOTAL AREA = 37,908 SF (0.870 AC) PERVIOUS AREA = 18,954 SF (0.435 AC) IMPERVIOUS AREA = 18,954 SF (0.435 AC) PERCENT IMPERVIOUS = 50.0%
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MICRO-BIORETENTION GRAVEL, SAND, PLANTING MEDIA, AND MULCH MATERIAL SPECIFICATIONS
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12" HDPE
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EX. 36" RCP
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EX. 36" RCP
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