Howard Hanson Dam
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 CoreLogic Finds $30B of Properties Exposed to Howard Hanson Dam VulnerabilityThirty-eight years ago, the Howard Hanson Dam in Washington state began water seepage in the northern abutment adjacent to the dam, which has now evolved into a potential flooding catastrophe. Following a torrential rainfall and subsequent record water volumes in the Howard Hanson Reservoir in January of 2009, the United States Army Corps of Engineers (USACE) labeled the dam as "unsafe"— a category that describes less than 5-percent of the over 80,000 dams in the U.S. that are in the very worst condition.
Currently, Federal Emergency Management Agency's (FEMA) does not reflect this potential flood risk in its flood maps. At the behest of the its insurance clients, CoreLogic Spatial Solutions analyzed multiple flood scenarios to quantify King County's overall exposure to the Howard Hanson Reservoir and to enable insurance carriers to identify their own portfolio risk. The analysis is built upon key river flow scenarios published by the USACE. Starting with these scenarios the CoreLogic's team of hydrologists and risk managers combined a series of both publically available and proprietary datasets and risk modeling tools to develop and validate multiple flood scenarios to quantify King County's overall exposure to the Howard Hanson Reservoir. CoreLogic is making this data avaialble to insurance underwriters as an enhancement to CoreLogic's Flood Risk Score (FRS) so they can utilize the results of the analysis to assess their own portfolio's risk . To see the full report and a detailed explanation of the river flow scenarios and methodology used to model the exposure, please clink on the link below. Click here to register and view the reportClick here to register and view the A4 version of the report |
| Last Updated on Thursday, 04 February 2010 16:52 |
H. Hanson Dam Links
USGS Green River Flood Gauges
USACE River Flow