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City of Southfield Civic Center Municipal Parking Lot. Economic, Innovative, & Green Rhett Gronevelt, P.E., OHM Richard Angell, B & L Landscaping. Project Overview. Background Deteriorated concrete pavement Base failure over 50% of parking lot Pavement settlement Drainage problems
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City of Southfield Civic Center Municipal Parking Lot Economic, Innovative, & Green Rhett Gronevelt, P.E., OHM Richard Angell, B & L Landscaping
Project Overview Background • Deteriorated concrete pavement • Base failure over 50% of parking lot • Pavement settlement • Drainage problems Design Objectives • Rehabilitate the existing parking lot (pavement) • Improve the site’s sustainability • Meet ADA requirements for accessibility • Safety Improvements & Vehicle Access (Pedestrians)
Traditional vs. Porous Asphalt Traditional Asphalt • Impervious • Conveys water to drainage system to point of discharge Porous Asphalt • Pervious • Provides water quality • Reduces the amount of storm water run-off into the drainage system. • Groundwater recharge
Storm Water Bioswale Storm Water • Storm Water Detention • 17,000 cft provided
A typical bio-swale provides 30-80% pollutant removal including decreases in petroleum products, excess nutrients, metals and sediments that may be found in stormwater. Bioswale
Improving the Quality of Life • Environmentally Porous pavement reduced the pollutants in stormwater runoff Alleviated flooding and contamination to streams Increased groundwater recharge Bioswale further decontaminates stormwater • Accessibility & Safety Improved barrier free pathways Decreased safety conflicts by rerouting the access road