Devil’s Gate Reservoir Restoration Project

Devil’s Gate Reservoir Restoration Project

Notice: UPDATED: Sediment Removal to Start June 4, 2020

LA County Public Works will resume sediment removal at Devil’s Gate Reservoir on Thursday, June 4, and continue its operations through November. Hauling hours are from 7 a.m. to 3:30 p.m., Monday through Friday.

LA County Public Works listened to and worked with community leaders and implemented mitigations to further contain and reduce fugitive dust emissions from entering communities surrounding Devil’s Gate Reservoir. We will continue to take the following steps to keep neighborhood streets clean:
• Pre-watering sediment prior to the loading of the trucks
• Watering all loaded trucks before they leave the reservoir to control material from blowing out of truck beds
• Street sweepers continuously sweeping paved surfaces, including the truck access ramp and the local sediment haul route
• Maintaining tire wash stations to remove dirt from tires and undercarriages of trucks

In addition, LA County Public Works performed the following improvements in the off-season surrounding Devil’s Gate Reservoir to address community concerns:
• Pavement treatment for local haul routes.
• Traffic signal improvements at major intersections along the sediment removal route to add dedicated left turn arrows for more efficient traffic flow and increased safety

This year, improvements to air quality monitoring systems are in place and LA County Public Works is pleased to announce the launch of a new real-time air monitoring website. We welcome feedback and are committed to making improvements to allow community members to make more informed decisions.

For more information on the full range of enhancements at Devil’s Gate Reservoir, visit the website at You can also ask questions or share your concerns at or by calling the project hotline at (626) 458-2507.