L.L. Anderson Dam Spillway Modification Project
3 Documents in Project
Summary
SCH Number
2008052096
Lead Agency
Placer County Water Agency
Document Title
L.L. Anderson Dam Spillway Modification Project
Document Type
MND - Mitigated Negative Declaration
Received
Present Land Use
Project area zoned: Timberland; Surrounding areas zoned Agriculture, Resource Protection, Rural Residential, Timberland, Urban Uses (1994)
Document Description
The presently proposed project involves widening the existing spillway at L.L. Anderson Dam and replacing and raising the dam crest parapet wall to pass the PMF. The spillway crest would need to be widened 32' to maintain the peak reservoir stage at El. 5273' during the general storm PMF. The spillway widening would be achieved by rock excavation with blasting and machinery, construction of new spillway structure, seepage cutoff through grouting of new spillway structure rock foundation, rock bolting and shotcrete, re-establishing automatic control system to the existing power adjacent to the new spillway structure, demolition of the existing spillway structure, and placement of excavated rock spoil against downstream face of the dam.
Contact Information
Name
Jon M. Mattson
Agency Name
Placer County Water Agency
Contact Types
Lead/Public Agency
Address
Phone
Location
Coordinates
Counties
Placer
Zip
95631
Total Acres
15
Parcel #
067-160-104-510
Waterways
Middle Fork American River
Township
15N
Range
13E
Section
36
Other Location Info
Foresthill
Notice of Completion
State Review Period Start
State Review Period End
State Reviewing Agencies
California Department of Fish and Wildlife, North Central Region 2 (CDFW), California Department of Parks and Recreation, California Department of Transportation, District 3 (DOT), California Regional Water Quality Control Board, Central Valley Sacramento Region 5 (RWQCB), California State Lands Commission (SLC), Central Valley Flood Protection Board, Office of Emergency Services, California, Resources Agency, Resources, Recycling and Recovery, State Water Resources Control Board, Division of Water Rights, State Water Resources Control Board, Divison of Financial Assistance, California Native American Heritage Commission (NAHC), Department of Water Resources, Cal Fire
State Reviewing Agency Comments
California Native American Heritage Commission (NAHC), Department of Water Resources, Cal Fire
Development Types
Other (Spillway Widening)
Local Actions
Project Approval
Project Issues
Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Cultural Resources, Geology/Soils, Hazards & Hazardous Materials, Hydrology/Water Quality, Noise, Recreation, Vegetation, Wetland/Riparian, Wildfire, Wildlife
Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, 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.