SCH Number 2021090475
- Big Tujunga Reservoir Restoration Project
- The proposed Project involves the removal of sediment from the Big Tujunga Reservoir (BTR) and placement of the sediment in the adjacent Maple Canyon Sediment Placement Site (SPS), which is located approximately 1.9 miles (when traveling via existing access roads) from BTR to the upper reach of Maple Canyon SPS. Maple Canyon SPS can accommodate approximately 4.4 million cubic yards (mcy) of additional sediment, which would bring the SPS to its ultimate planned sediment capacity. The Project involves the use of trucks and equipment to remove sediment and restore capacity to the BTR, and to allow it to adequately perform its main functions of flood control and water conservation. The following minor activities would occur in conjunction with the proposed sediment removal: (1) hydroblasting to flush a stilling well on the dam crest; (2) repairing the hydraulic sluicegate; (3) paving the unpaved sections of the north access road and repairing the culvert crossing; (4) incorporating slope protection measures adjacent to the spillway; (5) rehabilitating the northern reservoir access ramp to safely access the Reservoir bottom; (6) installing a boat dock at the dam face; and (7) performing minor coring on existing dam riser and installing a slide gate to facilitate dewatering.
2 documents in project