Sacramento Levee Upgrades DMM Cutoff Wall
A drill rig digging a Deep Mixing Methods (DMM) cutoff wall on 2 miles of levee improvements along the Sacramento River East Levee (SREL) in the Pocket neighborhood, Sacramento, Calif., July 12, 2022. Cutoff wall depths range from 50 to 150 feet and prevent water seepage through and under the levee during high water events. This is the third major construction contract to address seepage and stability concerns with the levee. This work is part of the American River Common Features 2016 project, which is a $1.5 billion collaborative effort between the U.S. Army Corps of Engineers, California’s Central Valley Flood Protection Board, California Department of Water Resources, and the Sacramento Area Flood Control Agency to modernize Sacramento’s aging flood infrastructure for more than 500,000 people in the greater Sacramento region.