Work Delayed on Devil’s Gate Restoration Project

Due to an unavoidable delay, grading work for habitat restoration as part of the Devil’s Gate Restoration Project will be completed late this month.
As part of the restoration, grading work to properly contour slopes will be followed by planting and seeding with native riparian species.

Approximately half of which will be harvested from nearby Hahamongna Watershed Park by the Hahamongna Native Plant Nursery.

The work at Johnson Field and Mining Pit was previously scheduled to be completed by mid-December.

Light construction equipment will be in use. Public access to trails will be open at all times. Working hours will be from 7 a.m. to 5 p.m.

The construction work, supervised by Public Works officials and an environmental consultant for the county, is not part of sediment removal operations currently underway in the reservoir.

The Devil’s Gate Reservoir Restoration project is a four-year effort to increase flood protection for communities downstream of Devil’s Gate Dam and restore habitat within a popular section of the Arroyo Seco Watershed.

The county Public Works Department plans to remove 1.7 million cubic yards of sediment from the reservoir immediately behind the 100-year old dam.
In addition to providing flood relief to communities that have endured nearly a decade of elevated flood risk in the Arroyo Seco, the project will establish a permanent stormwater maintenance area that allows for the creation of 70 acres of enhanced habitat and recreational opportunities for local communities.

Devil’s Gate is the oldest dam constructed by the L.A. County Flood Control District, providing flood protection for Pasadena, South Pasadena and Los Angeles.

A large amount of sediment has not been removed from Devil’s Gate since 1994, when workers hauled out 160,000 cubic yards. The Station Fire in 2009 dumped a million cubic yards of soil and debris into the basin.

For more information on the full range of enhancements at Devil’s Gate Reservoir, visit the website at DevilsGateProject.com. You can also ask questions or share your concerns at devilsgateproject@pw.lacounty.gov or call the Devil’s Gate Project Hotline at (626) 458-2507.