Lake Fordyce Dam Seepage Mitigation - Mitigated Negative Declaration and Notice of Intent

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 - Mitigated Negative Declaration and Notice of Intent
Document Type
MND - Mitigated Negative Declaration
Received
Project Applicant
El Dorado Irrigation District
Present Land Use
Forest

Document Description
Lake Fordyce 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 northwest of Truckee, California. Water released from Lake Fordyce flows into Fordyce Creek, which then drains to PG&E’s Lake Spaulding. In 2005, the California Department of Water Resources, Division of Dam Safety (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 consists of a number of prescribed improvements designed to reduce seepage. 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 and possible a fourth

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 Completion

Review Period Start
Review Period End
Reviewing Agencies
California Air Resources Board California Department of Conservation California Department of Fish and Wildlife, North Central Region 2 California Department of Forestry and Fire Protection California Department of Parks and Recreation California Department of Transportation, District 3 California Department of Water Resources California Energy Commission California Highway Patrol California Native American Heritage Commission California Natural Resources Agency California Regional Water Quality Control Board, Central Valley Sacramento Region 5 California Regional Water Quality Control Board, Lahontan South Lake Tahoe Region 6 California State Lands Commission Central Valley Flood Protection Board Department of Toxic Substances Control Office of Historic Preservation Sierra Nevada Conservancy State Water Resources Control Board, Division of Water Quality

Attachments

Environmental Document
FORDYCE - Summary_Form_for_Document_Submittal   PDF 579 K Fordyce NOI ISMND   PDF 364 K Fordyce Public Draft ISMND_09_24_2020-with Appendices   PDF 30306 K
NOC
NOC   PDF 327 K

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