www.sensemetrics.com PERRIS DAM PROBLEM Built in 1973, Perris Dam was classified as a high-priority Dam during the California Department of Water Resources’ (CA DWR) statewide assessment identifying Dams in need of structural upgrades. As part of this assessment, it was determined that Perris Dam required seismic retrofits and Cement Deep Soil Mixing (CDSM) reinforcement work. In general, the statewide initiative analyzed dams for structural integrity, specifically dams near fault lines. Perris Dam was determined to have a failure zone that was at risk during a seismic event. Terracon was awarded a contract to work with California DWR to complete construction of the seismic retrofit in 2017 through 2018. SOLUTION Condition monitoring of the dam and surrounding foundation was param

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