The last mass of concrete for the Folsom auxiliary dam is set to be placed July 11, completing the structure of the new dam east of Sacramento on the American River, the U.S. Army Corps of Engineers says.

 Work will then shift to completing installation of its remaining electrical and mechanical components, including its 12 giant gates.

 Concrete placement for the dam began in May 2012, and crews have worked nearly around the clock, six days a week to pour more than 100,000 cubic yards of concrete for the structure – enough to lay more than 4,000 foundation slabs for 2,000-square-foot homes.

 While construction of the new dam is scheduled to be complete in 2015, additional work on the spillway’s approach channel, downstream chute and stilling basin, which helps dissipate the energy of water released from the dam before it enters the American River, will continue until the project’s planned October 2017 completion.

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