Lake Fordyce Dam Seepage Mitigation, Notice of Determination
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Summary
- SCH Number
- 2020090506
- Lead Agency
- SWRCB, Division of Water Rights (State Water Resources Control Board, Division of Water Rights)
- Document Title
- Lake Fordyce Dam Seepage Mitigation, Notice of Determination
- Document Type
- NOD - Notice of Determination
- Received
- Posted
- 11/2/2020
- Project Applicant
- Pacific Gas and Electric Company
- Present Land Use
- Forest
- Document Description
- In 2005, the California Department of Water Resources, Division of Safety of Dams (DSOD) instituted a seepage threshold of 30 cubic feet per second (cfs) for Lake Fordyce Dam. Seepage at Lake Fordyce Dam exceeded the threshold in November 2011. Accordingly, in 2012 DSOD required PG&E to submit a plan and schedule to mitigate the seepage. The Project is intended to bring Lake Fordyce Dam into compliance with DSOD’s seepage threshold. The Project includes placing an impermeable membrane liner on the dam’s upstream face to cutoff seepage through the embankment and construct a new concrete plinth and grout curtain at the upstream toe of the dam. To implement these dam improvements, Lake Fordyce Road would be improved to allow construction equipment access. Additionally, a cofferdam would be constructed in Lake Fordyce to create a dry work area on the upstream face of the dam. The Project is scheduled to occur from April to October each year for three consecutive years. The cofferdam may be removed in the fourth year of construction due to weather conditions in the third construction year. During Project construction, minimum flow releases of 5 cfs into Fordyce Creek would continue to be met. This is to advise that the State Water Resources Control Board (Lead Agency) has, based on the record before it, approved the above described project on October 30, 2020, and has made the following determinations regarding the above described project.
- Contact Information
-
Jordan Smith
State Water Resources Control Board
1001 I Street
Sacramento, CA 95818
Phone : (916) 323-3645
jordan.smith@waterboards.ca.gov
Location
- Coordinates
- 39°22'51.8"N 120°29'48.2"W
- Counties
- Nevada Placer
- Waterways
- Fordyce Lake, Fordyce Creek
- Other Location Info
- The dam is on Fordyce Creek, a tributary of the South Fork of the Yuba River, in Nevada County; the dam is about 7 miles northwest of Soda Springs, California, and 15.5 miles west-northwest of Truckee, California
Notice of Determination
- Approving Agency
- State Water Resources Control Board
- Approving Agency Role
- Lead Agency
- Approved On
- Final Environmental Document Available at
- State Water Resources Control Board 1001 I street
Determinations
- (1) The project will have a significant impact on the environment
- No
- (2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
- No
- (2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
- Yes
- (2c) An other document type was prepared for this project pursuant to the provisions of CEQA
- No
- (3) Mitigated measures were made a condition of the approval of the project
- Yes
- (4) A mitigation reporting or monitoring plan was adopted for this project
- Yes
- (5) A Statement of Overriding Considerations was adopted for this project
- No
- (6) Findings were made pursuant to the provisions of CEQA
- No
Attachments
- Notice of Determination
- 2310A-2020-10-30-SWRCB-NOD ISMND-signed PDF 275 K CDFW Filing Receipt PDF 224 K
Disclaimer: The Governor’s Office of Planning and Research (OPR) accepts no responsibility for the content or accessibility of these documents. To obtain an attachment in a different format, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at state.clearinghouse@opr.ca.gov or via phone at (916) 445-0613. For more information, please visit OPR’s Accessibility Site.