The Lower San Fernando Dam is located at the southern end of LADWP’s Van Norman Complex. The dam has a low-level outlet that discharges into what LADWP refers to as the San Fernando Creek. The creek receives flow from the Lower San Fernando Detention Basin and discharges into the Bull Creek Extension Channel. The total length of San Fernando Creek is approximately 1,265 feet.
The State of California, Department of Water Resources, Division of Safety of Dams (DSOD), regulates dams, including out-of-service reservoirs, to prevent failure, safeguard life, and protect property. DSOD regularly inspects the Lower San Fernando Dam and has requested a number of actions be taken in their October 2018 and May 2020 inspection reports, including the activity subject to this Notification. Per DSOD, vegetation is obstructing the low-level outlet and, thus, needs to be removed by November 1, 2021.
The vegetation obstructing the outlet is dominated by southern cattail with a few arroyo willow. LADWP proposes to trim the vegetation approximately 20 feet back from the outlet and 20 feet across the width of the creek, impacting approximately 0.006 of southern cattail and 0.004 acres of arroyo willow. The cattail would be cut down to base using hand tools only. Water is present in the creek; however, maintenance activities will avoid the wetted portion of the creek. The cut vegetation would be transported offsite for disposal. Work will take approximately 2-4 days to complete.