FORT WORTH, Texas --
Fort Worth District, U.S. Army Corps of Engineers officials announce award of a contract to construct the modifications of the spillway at Lewisville Dam to Shimmick Construction Co. LLC, Irvine, California, in the amount of $76.1 million.
The project was approved in 2017 at an estimated cost of $150 million in October 2016 dollars to design and construct the approved repairs. The modifications are funded by the Bipartisan Budget Act of 2018 (Public Law 115-123) and the Consolidated Appropriations Act for 2019 (Public Law 115-244). Work to reduce risks of dam failure from seepage was completed in August 2021. Lewisville Dam continues to successfully perform all the functions for which it was designed (flood risk management, water supply, recreation, and environmental stewardship).
This spillway contract is the final construction contract. It will address the risks associated with spillway stability by constructing post-tensioned anchors, installing an upstream geomembrane cutoff, overlaying the spillway apron, and installing a cut off wall and erosion protection measures to prevent movement of the new apron panels and reduce scour and erosion in the spillway channel during flow events. The contract is expected to take approximately four years and take place in areas restricted to authorized personnel only. No impacts to recreation or water supply are anticipated.
Additional Lewisville Dam Safety Modification Project information is available at https://www.swf.usace.army.mil/Home/Lewisville-Lake-Dam/.
Questions regarding the Lewisville Dam Safety Modification project can be directed to USACE Public Affairs Specialist Clay Church at 817-886-1314 or email@example.com.
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Release no. 22-013