Single Family Home Construction near unnamed tributary to Latigo Canyon

Single Family Home Construction near unnamed tributary to Latigo Canyon

The Operator proposes to alter three ephemeral drainages (drainage A and B and C) to construct a catch basin, drainage swale and culvert with outfall to convey storm water from two ephemeral drainages. The project is associated with the construction of a proposed single family home and driveway. The small catch basin will intercept runoff from drainage A and B and combine the flows into drainage C via an underground culvert beneath a dirt access road at the foot of the driveway. The outfall with energy dissipater will be constructed at the outlet of the culvert into drainage C. Drainage A and drainage B support chaparral upland species while drainage C supports very few scattered mulefats, willows and chaparral vegetation immediately on the down grade side of the dirt road where the culvert outlet and associated energy dissipater is proposed. The Operator also proposes to clear vegetation from drainagea A and B to reduce fuel loads to comply with Los Angeles County Fire Department codes. An approximate 10 foot wide by 20 foot long section of drainage A will be cleared of vegetation while an approximate 20 foot wide by 180 foot long section of drainage B will be cleared of vegetation and then filled in to reduce bank slope steepness while maintaining a drainage swale. The Operator proposes to plant native vegetation within drainages A and B which will be periodically cut and or mowed subject to fire department fuel reduction compliance standards. The proposed project will result in approximately 20 square feet (0.0004 acres) of permanent impacts to the culvert and rip rap energy dissipater in drainage C and a total of 3,800 square feet (0.087 acres) of permanent impacts to drainage A and B from fill and fuel modification activities for a total of 0.087 acres of impacts to Department jurisdiction.

Los Angeles