Jan. 22—The California Department of Water Resources (DWR) said late last week that there would be "routine testing" conducted on Wednesday morning on Oroville Dam's main spillway gate hoist system.

The USDA-ARS Experiment Lake Dam in Woodward has been redesigned to include a new spillway design to maintain base flow and limit overflow during a flood. The spillway design is based on standardized ...

OROVILLE — With Lake Oroville creeping toward capacity, concerns over emergency spillage loom. The California Department of Water Resources, however, said this won’t happen because of controlled ...

MARION — The Little Grassy Lake dam and spillway structure on Crab Orchard National Wildlife Refuge (Refuge) is now over 80 years old. The age of this structure is beyond its engineered design life.

On the morning of Feb. 7, 2017, two electricians were working on a warning siren near the spillway of Oroville Dam, 60 miles north of Sacramento, when they heard an explosion. As they watched, a giant ...

East of Harrisburg, Lake Alvin has hit the point of bursting. Significant rains, starting Thursday and continuing into late Friday night, filled the lake's spillway, a water control structure meant to ...

A recent letter from the Four Lakes Task Force was sent to lake property owners dated July 2025. Restoration progress was reported on the individual dams including anticipated lake refill dates.