OROVILLE (AP) — With stormy weather approaching, state water managers announced Thursday they will resume releasing water down a damaged spillway at the nation’s tallest dam.
The badly eroded main spillway at California’s Oroville Dam hasn’t been used since March 27. Workers have been reinforcing the massive concrete chute in hopes of protecting it from further damage during the remainder of the wet winter season.READ MORE: 'Non-Specific Threat' Shuts Down San Francisco State Campus
Major repairs are expected to begin later this spring and could take up to two years and cost hundreds of millions of dollars.
Nearly 200,000 people were ordered to evacuate Feb. 12 when a second, emergency spillway began breaking apart from floodwaters. To avert a potential disaster, operators released huge amounts of water down the damaged main spillway to lower the level of the lake behind the dam, cutting the flow over the second spillway. Residents were allowed to return home later that week.
Authorities say the dam itself suffered no damage.READ MORE: Deadly Rip Tide Warning Issued For Northern California Beaches
Oroville reservoir is the state’s second-largest, and anchors the system of aqueducts, canals and pumps that moves water from Northern California to more arid Central and Southern California.
A federal investigation into the crisis is underway.
Earlier this month, Gov. Jerry Brown waived some permitting and review requirements to speed up repairs to the main spillway. The state Department of Water
Resources, which operates the dam, is reviewing proposals for the work and could award a contract shortly.MORE NEWS: Simone Biles Opens Up About Olympic Struggles Before Taking Stage In San Francisco
Meanwhile, operators will have to carefully manage the lake level, with more rain and melted snow expected to pour in. Releases down the main spillway are scheduled to begin Friday, and last up to two weeks.