HomeMy WebLinkAboutMelvin_Avenue_PIM_Presentation_12-14-20091
City of Oshkosh
Stormwater Management
Melvin Avenue Street Reconstruction
Neighborhood MeetingNeighborhood Meeting
December 9, 2009December 9, 2009
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
• Design Standards
• Alternatives Analyzed
– Conveyance Upgrades
– Pump Station
– Pump Station and Detention Basin
• Performance in Larger Storm Events
• Summary
• Discussion
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Watershed Characteristics
• Approximately 106 Acres
• Roughly Bounded by:
– North Main Street
– Irving Avenue
– Melvin Avenue
– Lake Winnebago
• Primarily Residential Land Use (>95% of area)
• Unique features:
– Railroad
– Menominee Park
– Webster Stanley Middle and Elementary Schools.
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Watershed Characteristics
Irving Avenue
East New York Avenue
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Melvin Avenue
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Design Standards
• Eliminate Street Flooding for 10-year Design
Storm.
– For Melvin Avenue – 1.3” of rain in 30 minutes.
• Reduce Street Flooding for Larger Storm Events
to the Maximum Extent Practicable.
– Look at 25-year Design Storm (1.65” in 30 minutes)
– Look at 100-year Design Storm (2.35” in 30 minutes)
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Alternatives Analyzed
• Conveyance Upgrades
– Can Design Standards be met?
• Looked at numerous pipe system only upgrades to attempt to
meet Design Standards.
• Shallow depth created pavement design problems.
• No pipe system only upgrades could meet design standards.
– Look at upgrades in conjunction with other solutions.
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Alternatives Analyzed
• Pump Station
– Can Design Standards be met?
• 180 cfs pump station (81,000 gpm) with pipe system
upgrades can meet Design Standards.
– Other Impacts
• Approximately 60’x60’ pump station building footprint.
– Cost Estimate
• Estimated at approximately $4 million
– Includes pipe system upgrades in Melvin Avenue and pump
station.
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Alternatives Analyzed
Irving Avenue
East New York Avenue
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Melvin Avenue
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Pump Station
Location
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Alternatives Analyzed
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Alternatives Analyzed
• Pump Station and Detention Basin
– Can Design Standards be met?
• 50 cfs pump station (22,000 gpm) with pipe system upgrades
and detention basin can meet Design Standards.
– Other Impacts
• Approximately 35’x35’ pump station building footprint.
• Acquisition and Relocation of 6 residential properties
– Cost Estimate
• Estimated at approximately $3 million
– Includes pipe system upgrades in Melvin Avenue, pump
station, acquisition and relocation and construction of detention
basin.
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Alternatives Analyzed
Irving Avenue
East New York Avenue
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Melvin Avenue
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Detention
Basin Location
Pump Station
Location
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Alternatives Analyzed
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Summary
1. Large Pump Station
• Meets Criteria of no street flooding in 10-year design
storm
• Approximately 60’x60’ building in Park
• Approximately $4 million cost
• No property acquisition
2. Detention Basin and Smaller Pump Station
• Meets Criteria of no street flooding in 10-year design
storm
• Approximately 35’x35’ building in Park
• Approximately $3 million cost
• 6 residential properties must be acquired.
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Discussion