Malibu Lake Dredging Project

Malibu Lake Dredging Project

The Applicant proposes to alter two (2) perennial streambeds, Malibu Lake, and three sediment catch basins (Medea, Middle and Crags) for routine maintenance dredging and sediment removal activities. Work associated with routine maintenance and dredging at the confluence of Triunfo and Medea Creeks involves backhoes and tractors to remove sediment and return or maintain the low flow areas of the creeks at their confluence with Malibu Lake. Work associated with routine maintenance dredging at Malibu Lake involves one hydraulic dredge and three sediment catch basins inro which dredge spoils are pumped from the lake bottom. While operating on the lake, the dredge pumps spoils through floating segmented pipe sections that can be connected to permanent inflow pipes associated with any one of the three basins. The location of the dredge on the lake determines which basin receives dredge spoils during dredging operations. Typically, between 5,000 and 20,000 cubic yards of sediment are removed from the lake annually. When dry enough for rehandling (less than 50% moisture in soil, no standing water) dredge spoils are periodically excavated from the basins with back hoe and loaded directly into trucks for subsequent reuse or stockpiled in adjacent upland locations, if necessary, prior to removal and reuse. The project site and adjacent parcels support a mosaic of moderate to dense native plant communities and a diverse variety of wildlife.

Los Angeles