FEMA Mitigation Best Practices: Alenaio Stream Flood Control Project   [open pdf - 26KB]

Alternate Title: Alenaio Flood Control Project Flood Control Keeps Community Dry

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: "It was November 2000 when more than 27 inches of rain fell on the city of Hilo in a 24-hour period. The banks of the Alenaio Stream overflowed, and the water marks reached 10 feet high. Fortunately for the community of Hilo, the floodwall was 12 feet high. [...] It was in 1994 when the Water Resources Development Act of 1990 authorized the Secretary of the Army to construct a watershed to control and direct floodwaters. This project was designed to contain the 100-year flood, removing the flood designation for eight properties. One of these is the Hilo Central Fire Station, which was then eligible for a Hazard Mitigation (404) Grant to seismically retrofit the Drying Tower. The floodwall guides the water into the channel and terminates in a catch basin, which also serves as a soccer field. The soccer field was constructed in an area where commercial structures had previously been flooded and destroyed by Tsunamis. The excess water from the channel captured in the soccer field ultimately flows to the Pacific Ocean." 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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