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Remediation Projects

Perris Lake

Dam Remediation – construction underway

The repair to the dam will be limited to approximately 5000 feet of the left reach, shown in the picture above. Crews will strengthen this portion of the foundation by mixing cement with the existing deep soil. When complete, a stability berm will be added on top. The dam's existing drain system will be excavated and extended as well. These repairs will allow DWR to return the reservoir to its previous operating level. More...

Emergency Release Facility - Draft EIR Available

An emergency outlet, a standard feature of all regulated dams, is currently located near the southeast end of the dam. The outlet is designed to drain the reservoir to avert any potential failure of the lake should a dam emergency occur.

Due to the slope of the land, the current emergency outlet directs water to the southwest and across the Ramona Expressway. From this direction the water naturally flows toward the Perris Valley Channel, a flood control facility operated and maintained by the Riverside County Flood Control District. This flow direction would pose a risk to the residential homes that are now standing on the farmland that was located southwest of the dam when the dam was first constructed.

The proposed Emergency Release Facility Project (ERF) would reduce the damage that would be caused to life and property resulting from an emergency release by directing the water northwest through a system of levees and channels. That system is designed to run parallel to the Ramona Expressway and send water directly into the Perris Valley Channel.

The Emergency Release Facility Environmental Impact Report is available here. A printed copy of the EIR is available at the Office of Planning and Research, Riverside County Library, Perris Branch (163 E. San Jacinto Ave., Perris, CA 92570), and Moreno Valley Public Library (25480 Alessandro Blvd., Moreno Valley, CA 92553). A public comment meeting will be held on Tuesday, September 27th, 2016 at the Lake View Pavilion, Lake Perris State Recreation Area (SRA) 17801 Lake Perris Drive, Perris, CA 92571. Please click here for a map and directions to the meeting. The review period will begin on September 9, 2016 and end on October 24, 2016. Please submit all comments to Tom Barnes by COB October 24, 2016.

Outlet Tower Replacement or Refurbishment – in evaluation

DWR is currently evaluating the seismic stability of the outlet tower located at the southeast corner of the lake and will determine if the tower needs rehabilitation or needs to be replaced. DWR expects to have a decision by the end of 2016.