Big Tujunga Reservoir Sediment Removal Project
Summary
SCH Number
2013051025
Lead Agency
Los Angeles County Flood Control District
Document Title
Big Tujunga Reservoir Sediment Removal Project
Document Type
MND - Mitigated Negative Declaration
Received
Present Land Use
Big Tujunga Reservoir (BTR) and Maple Canyon Sediment Placement Site; Open Space zoning; O-NF designation
Document Description
The project involves restoring flood management and water conservation capacity by excavation up to 4.4 million cubic yards of sediment within Big Tujunga Reservoir and placing the sediment within the adjacent Maple Canyon SPS up to its capacity. Sediment removal would occur during the non-storm season via trucks or conveyor belts. Sediment removal is anticipated to take approximately five years, or more if needed. During each year of sediment removal, activities would start on or shortly after April 16 and would include: (1) installing a bypass line to divert inflow from the reservoir (upstream of the Dam) into Big Tujunga Creek; (2) dewatering the plunge pool and fish removal; (3) installing sediment filtration best management practices at the plunge pool's outfall into Big Tujunga Creek; and (4) dewatering the reservoir. Dam functions would be restored for normal operations during the storm season on October 15 of each year.
Contact Information
Name
Eric Lim
Agency Name
Los Angeles County Flood Control District
Contact Types
Lead/Public Agency
Address
Phone
Location
Coordinates
Counties
Los Angeles
Cross Streets
Big Tujunga Canyon Road / Angeles Forest Highway
Zip
91501
Total Acres
45/29
State Highways
SR-2
Waterways
Big Tujunga Canyon Creek
Township
2N
Range
13W
Section
1
Other Location Info
La Crescenta-Montrose, Sunland
Notice of Completion
State Review Period Start
State Review Period End
State Reviewing Agencies
Air Resources Board, Major Industrial Projects, California Department of Fish and Wildlife, South Coast Region 5 (CDFW), California Department of Parks and Recreation, California Department of Public Health (CDPH), California Department of State Parks, Division of Boating and Waterways, California Department of Transportation, District 7 (DOT), California Highway Patrol, California Native American Heritage Commission (NAHC), California Regional Water Quality Control Board, Los Angeles Region 4 (RWQCB), California State Lands Commission (SLC), Office of Emergency Services, California, Resources Agency, Resources, Recycling and Recovery, State Water Resources Control Board, Division of Water Rights, Department of Water Resources
State Reviewing Agency Comments
Department of Water Resources
Development Types
Other (Sediment Removal and placement, flood control)
Local Actions
Sediment Removal
Project Issues
Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Cultural Resources, Cumulative Effects, Drainage/Absorption, Flood Plain/Flooding, Geology/Soils, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Mineral Resources, Noise, Population/Housing, Public Services, Recreation, Solid Waste, Transportation, Vegetation, Wetland/Riparian, Wildfire, GHGE
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.