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Eagle Mountain Spillway Dam

 

Eagle Mountain Spillway Dam

 

WSP USA came on board in 2007 to provide a comprehensive seepage and stability assessment for Tarrant Regional Water District (TRWD)’s Eagle Mountain Lake Spillway Dam, concluding that dam replacement was not necessary and upgrading it for a fraction of the replacement cost, saving the client $4 million. Eagle Mountain Lake is a body of water impounded by two large, 80-year-old embankment dams. The lake is one of the largest water suppliers in Texas, serving more than 1.7 million people.

Our field testing determined the main dam met industry guidelines for dam safety with only minor upgrades in order to modernize seepage control measures. But testing at the spillway dam revealed a need to close previously unknown gaps in its existing cut-off. Original records revealed a gap of about 130 feet of subsurface cut-off barrier under the spillway dam from the original construction. The upgrades were made without changing the aesthetics of the dam.

The project received the 2014 National Rehabilitation Project of the Year Award during the ASDSO Dam Safety 2014 Conference in San Diego, California. Eagle Mountain Lake Spillway Dam was the unanimous choice for the honor among six projects nominated.