Rock Creek—Cresta Sediment Management Plan

by Larry L. Harrison, Pacific Gas and Electric Co, San Francisco, United States,

Document Type: Proceeding Paper

Part of: Water Resources Planning and Management: Saving a Threatened Resource—In Search of Solutions


Pacific Gas and Electric Company (PG&E), an investor owned utility serving northern and central California, is working to manage sediments at its Rock Creek - Cresta Hydroelectric Project, FERC No. 1962, (Project) on the North Fork Feather River to ensure continued operation of the 182 mW Project. The Project's two reservoirs have accumulated 5.2 million cubic meters of sediment since completion in 1950. PG&E plans to dredge 382,000 cubic meters from each reservoir beginning in 1993. In follow-up to dredging, PG&E plans to modify the two dams to pass-through sediments during high flows. In addition, PG&E is participating in an erosion control program in partnership with 13 local, state and federal agencies, and private landowners to reduce the volume of sediments flowing to the reservoirs. The preferred sediment management program was adopted following studies of environmental factors, optimum dredging volumes, disposal sites, transportation plans, and dredging methods.

Subject Headings: Rocks | Sediment | Management methods | Hydro power | Sediment transport | Project management | Natural gas | Electric power | California | United States

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