HomeMy WebLinkAboutWesthaven_Clubhouse_PIM_06-01-2011_Slideshow1
City of Oshkosh
Stormwater Management
Westhaven Clubhouse Area Detention Basin
Neighborhood MeetingNeighborhood Meeting
June 1, 2011June 1, 2011
James Rabe, P.E., CPESCJames Rabe, P.E., CPESC
Civil Engineer IICivil Engineer II
Storm Water UtilityStorm Water Utility
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Overview
•Watershed Characteristics
•Purpose of the Project
•Detention Basin Design
•Discussion
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Watershed
Characteristics
Project Area
Watershed = 72 acres
W. 20th Ave.
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Newport Ave.Detention Basin
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Purpose of Project
•Eliminate Street Flooding for 10 -year Rain Storm
–2.06”of rain in 2 hours.
•Reduce Street Flooding for Larger Storms
Look at performance during
–25-year rain (2.59”in 2 hours); and
–100-year rain (3.68”in 2 hours)
•Keep Flooding on Streets and Away from
Homes for Larger Storms
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Detention Basin Design
•Flood Control Benefits
–Storm sewer improvements reduce flooding in
watershed
•Westhaven Circle
•Westhaven Drive
•Maricopa Drive
•Newport Court
–Stormwater stored and slowly released
•Reduce flooding downstream
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Detention Basin Design Considerations
•Add Inlet Capacity
–Increase size of inlets
–Add more inlets
–Newport Court, Westhaven Circle, Westhaven Drive,
& Maricopa Drive
•Detention Basin
–Maximize stormwater storage (Approx 17 ac-ft)
–Reduce stormwater pollution (trap sediment)
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Detention
Basin Design
Considerations
Forebay
(Sediment Capture)
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Detention Basin Design Considerations
•Safety Considerations
–Gradual side slopes above water
–14 foot wide safety shelf area (1 foot or less of water)
•Aesthetics
–Prairie grasses/flowers on side slopes
–Wetland plantings in shallow water areas
–Trees & shrubs
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Discussion