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Last modified
1/25/2010 7:09:36 PM
Creation date
10/5/2006 2:26:35 AM
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Template:
Floodplain Documents
County
Statewide
Basin
Statewide
Title
Mitigation Success Stories in the United States
Date
10/10/1991
Prepared By
Association of State Floodplain Managers
Floodplain - Doc Type
Educational/Technical/Reference Information
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<br />SUSSEX COUNTY SANITARY SEWER UPGRADE <br /> <br />BACKGROUND <br /> <br />The project involved floodproofing a sanitary sewer system along the shore of Indian <br />River Bay, Sussex Cmmty, Delaware. Hatch cover doors were vulnerable to direct salt <br />water flooding in the lO-year event allowing salt water and sand to be pumped <br />towards the treatment plant damaging pumping equipment. Additionally, large <br />volumes of floodwater overwhelmed the treatment capacity, potentially discharging <br />undertreated sewage into the envirorunent. <br /> <br />PROJECT <br /> <br />Hatch cover openings, previously below the la-year flood elevation were elevated to <br />the SO-year flood elevation or above. Electronic components were relocated to <br />watertight cabinets. This mitigation effort was a result of a federal disaster declaration. <br /> <br />BENEFITS <br /> <br />In February 1998, a coastal storm caused Indian River Bay to reach the 35-year flood <br />stage. This event would flooded the entire project area and floodwaters would have <br />entered every opening. The County estimate that the event would have caused an <br />estimated $98,947 in damage, primary related to direct property damage, sewer back- <br />ups and loss of revenue to businesses which would have been forced to close. Since the <br />disaster occured, another disaster has tested the value of this mitigation effort. <br /> <br />PROJECT COST <br />$49,454 <br /> <br />FUNDING SOURCE <br />HMGP - 50%, Sussex County 50% <br /> <br />FUNDING RECIPIENT <br />Sussex County Department of Engineering <br />
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