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DRAINAGE LEGEND
205 WEST WACKER DRIVE
SUITE 2125
CHICAGO, ILLINOIS
60606-1418
CA 00000696
KHA PROJECT # 168113021
No.
PE11011695
STATE OF
DRAINAGE CALCULATIONS
DRAINAGE TABULATIONS
Issue Date:5/21/12
REVISION INFORMATION
FLOOD PLAIN:
STORM SEWER:
PRIVATE DRIVE
DRAINAGE SUMMARY TABLE
2.80 AC
SITE ACREAGE
0.49 AC (MICHIGAN RD ROW)
OFF SITE/UPSTREAM ACREAGE
0.10 CFS/AC FOR 10 YEAR = 0.33 CFS
ALLOWABLE RELEASE RATES
0.27 CFS/AC FOR 100 YEAR = 0.89 CFS
892.76 (MFPG/MLAG=894.76)
MAX OVERFLOW WEIR ELEV
894.05 (MFPG/MLAG 896.05)
MAX SURF. ELEV. W/ INLETS PLUG
Restaurant #:10G0074
CRITICAL 10 YR RELEASE RATES
0.32 CFS
POST-DEVELOPED 10-YR FLOWS
1.7" AT BOTTOM OF POND
WEST POND ORIFICE SIZING
OLIVE GARDEN
SOUTHEAST POND ORIFICE SIZE2.0" AT BOTTOM OF POND
CRITICAL 100 YR RELEASE RATES
10206 N MICHIGAN ROAD
0.89 CFS
POST-DEVELOPED 100-YR FLOWS
1.7" AT BOTTOM AND 2.2" AT 891.47
WEST POND ORIFICE SIZING
2.0" AT BOTTOM AND 4.3" AT 890.74
SOUTHEAST POND ORIFICE SIZE
PROTOTYPE P76L - WD
6" ORIFICE 10 YR RELEASE RATES
3.67 CFS
POST-DEVELOPED 10-YR FLOWS
6" ORIFICE
WEST POND ORIFICE SIZING
6" ORIFICE
SOUTHEAST POND ORIFICE SIZE
6" ORIFICE 100 YR RELEASE RATES
CARMEL, IN
4.31 CFS
POST-DEVELOPED 100-YR FLOWS
6" ORIFICE
WEST POND ORIFICE SIZING
SOUTHEAST POND ORIFICE SIZE6" ORIFICE
DRAWING
28,834 CF
DETENTION REQUIRED
42,681 CF
DETENTION PROVIDED
DRAINAGE
*MINIMUM FLOOD PROTECTION GRADE OF ALL STRUCTURES FRONTING A POND OR
PLAN
OPEN DITCH SHALL BE NO LESS THAN 2 FEET ABOVE ANY ADJACENT 100-YEAR
LOCAL OR REGIONAL FLOOD ELEVATIONS, WHICHEVER IS GREATER, FOR ALL
WINDOWS, DOORS, PIPE ENTRANCES, WINDOW WELLS, AND ANY OTHER
STRUCTURE MEMBER WHERE FLOODWATERS CAN ENTER A BUILDING.
C4.3