FEMA Mitigation Best Practices: Backwater Valves Protect Basements   [open pdf - 27KB]

Alternate Title: Backwater Valves Protecting Basements

This document is part of the Federal Emergency Management Agency (FEMA) Best Practices Portfolio. The Best Practices Portfolio is a collection of true stories about people and communities who have experienced disasters, and what mitigation they used to survive, rebuild, and prepare for disasters. From the document: "The City of South Portland has an old combined sewer system. When it rains, all of the runoff goes into the system. When heavy rain and flooding occurs, the sewer system is overwhelmed and the cellars of houses are swamped. This has resulted in health hazards and repeated damage to items in the basements. [...] In February 1998, the City began its Backwater Valve Program and installed valves in 89 participating houses within 5 months. Each valve cost $397, including installation. The city council approved expenditure of $35,000. Of that, the Federal share was $26,250 and the City paid the rest. The program is considered a success." This and other individual FEMA Best Practices documents are also combined in "Mitigation Best Practices: Public and Private Sector Best Practice Stories for All Activity/Project Types in All States and Territories Relating to All Hazards [August 10, 2011]," which can be accessed at the following link: [https://www.hsdl.org/?abstract&did=683132]

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Federal Emergency Management Agency (FEMA): http://www.fema.gov/
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