ARCADIA, Calif.— One of Angeles National Forest’s roads in the Upper San Gabriel River watershed—West Fork Road or National Forest System Road No. 2N25—will be temporarily closed to all recreationists on weekdays only (except on Federal holidays) for public safety from April 1 through Dec. 1 in both 2022 and 2023. This road closure is requested by Los Angeles County Public Works for sediment removal operations.
The goal is to remove up to 2 million cubic yards of sediment that has accumulated in the Cogswell Reservoir because of the Station Fire of 2009 and the Bobcat Fire of 2020. (Sediment has accumulated because fire burns away vegetation and leaves little to hold soil and rocks in place.)
Project work includes unclogging inlets/outlets and excavating and transporting sediment from the reservoir via heavy construction equipment to the adjacent sediment placement site. This sediment removal work provides vital flood control capacity to protect downstream communities.