Lenihan Dam Outlet Modifications Project
7 Documents in Project
Summary
SCH Number
2003022090
Lead Agency
Santa Clara Valley Water District
Document Title
Lenihan Dam Outlet Modifications Project
Document Type
EIR - Draft EIR
Received
Present Land Use
Lenihan Dam and Lexington Reservoir are used primarily for water storage. Existing zoning is "Hillside (HS d1sr)."
Document Description
Since the late 1980's, sections of the Lenihan Dam Outlet outlet pipeline have experienced buckling. Due to these conditions, the Divisions of Safety of Dams (DSOD) has imposed an operation restriction limiting discharges through the outlet pipe to 70 cubic feet per second (cfs) reducing optional flexibility. The project is intended to provide a fully functional outlet works through the construction of the following elements: 1) a tunnel through the hillside to the south of Lenihan Dam to carry a new outlet pipe; 2) a multi-port inclined intake structure in Lexington Reservoir adjacent to the dam; 3) an energy dissipation structure in Los Gatos Creek at the new pipeline discharge; and 5) new control buildings for operation of the control valve located near the adjacent Santa Clara County Department of Parks and Recreation parking lot and the proposed outlet energy dissipation structure. Construction period would be about 18 months, using several staging areas including an existing paved lot that provides parking for public recreational uses. Reservoir levels will be lowered for one year and a coffer dam will be installed to allow for construction of the new intake structure.
Contact Information
Name
Tiffany Hernandez
Agency Name
Santa Clara Valley Water District
Contact Types
Lead/Public Agency
Phone
Location
Cities
Los Gatos
Counties
Santa Clara
Cross Streets
Alma Bridge Road
Total Acres
~85
Parcel #
53701001
State Highways
17
Waterways
Los Gatos Creek
Township
8S
Range
1W
Section
32
Base
Mt.
Notice of Completion
State Review Period Start
State Review Period End
State Reviewing Agencies
California Department of Parks and Recreation, California Energy Commission, California Highway Patrol, California Native American Heritage Commission (NAHC), California Regional Water Quality Control Board, San Francisco Bay Region 2 (RWQCB), Office of Historic Preservation, Resources Agency, State Water Resources Control Board, Division of Water Rights, Department of Water Resources, California Department of Transportation, District 4 (DOT), California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW)
State Reviewing Agency Comments
Department of Water Resources, California Department of Transportation, District 4 (DOT), California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW)
Development Types
Water Facilities (Type dam), Other (tunnel)
Local Actions
Dam Outlet
Project Issues
Aesthetics, Air Quality, Cultural Resources, Flood Plain/Flooding, Geology/Soils, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Noise, Public Services, Recreation, Transportation, Vegetation, Wetland/Riparian, Wildlife, Fisheries
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.