Lake Skinner Outlet Tower Shutdown Dewatering, (Streambed Alteration Agreement # EPIMS-RIV- 16967-R6)
- SCH Number
- Public Agency
- Metropolitan Water District of Southern California
- Document Title
- Lake Skinner Outlet Tower Shutdown Dewatering, (Streambed Alteration Agreement # EPIMS-RIV- 16967-R6)
- Document Type
- NOE - Notice of Exemption
- Document Description
- The Project is a dewatering event and shutdown of the Lake Skinner Outlet Tower. Dewatering is to allow staff to conduct maintenance. This event will begin April 4, 2021 continuing through April 10, 2021, or modified dates with CDFW approval. Project activities in the stream areas include the placement of erosion control measures and the release of water into jurisdictional areas from one discharge locations within Tucalota Creek. Dewatering methods include releasing water via an existing outlet pipe; diverting raw water through a filtration system, dissipation socks, or dewatering hoses; and discharging the water to stream areas.Between the defined dates, 3.1 acre feet (AF) of raw water will be released into the Lake Skinner concrete spillway, located near the southern end of the Lake Skinner Dam, and temporarily held in a grouted riprap basin at the base of the spillway. The water will be released from the basin to Tucalota Creek through an existing drain valve at a rate of 75-100 gallons per minute, equal to about 0.17-0.22 cubic feet per second (cfs). The release will be regulated at the release valve to maximize percolation into Tucalota Creek. While one dewatering discharge is planned for this location, Metropolitan may be required to dewater the Lake Skinner Outlet Tower up to five additional times at up to 5 cfs to make the necessary repairs, if deemed necessary following the post-repair inspection.
- Contact Information
Department of Fish and Wildlife
3602 Inland Empire Blvd. Suite C-220
Ontario, CA 91764
Phone : (909) 549-8245
- Southern California
- Other Location Info
- The Lake Skinner Outlet Tower Shutdown Dewatering project (Project) is located at the base of the Lake Skinner Dam in Riverside County, California. The Project is located within Townships 7S, Range 2W, Section 3 on the U. S. Geological Survey Bachelor Mountain 7.5 minute series quadrangle topographic map, Riverside County.
Notice of Exemption
- Exempt Status
- Categorical Exemption
- Type, Section or Code
- Type – Class 1; California Code of Regulations, title 14, section (15301) Type-- Class 4; California Code of Regulations
- Reasons for Exemption
- This Project is limited to the repair and maintenance of an existing structures and will result in minor alterations to the land which do not involve removal of healthy, mature, scenic trees.
- County Clerk
- Notice of Exemption
- EPIMS-RIV-16967-R6_NOE PDF 182 K
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