Repair milestone: The spillway repair at the Oroville Dam "is indeed ready to safely handle winter flows if needed,” says Grant Davis, director of the Department of Water Resources. Our drone fly-over shows the spillway on Wednesday, November 1, 2017.
Randall BentonThe Sacramento Bee
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The Department of Water Resources has released a fly-over video of the State Water Project, the water storage and delivery system of reservoirs, aqueducts, power plants and pumping plants serving 25 million Californians and 750,000 acres of irrigated farmland. The video begins in Northern California.
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This compilation of drone footage from May 20, 2017 through November 1, 2017 highlights the transformation of Lake Oroville’s main spillway during repairs. Kiewit Infrastructure has led the massive construction effort to repair and reconstruct the main spillway by Nov. 1, 2017 to handle flows of 100,000 cubic-feet per second this winter.
Crews lay the last layer of concrete on the Oroville Dam spillway before the state Department of Water Resources’ deadline to have the structure ready to pass flows of 100,000 cubic-feet per second. This video was taken October 30, 2017, just two days before the deadline. The cost for reconstruction rang in at $500 million, nearly double the initial estimate.
Oroville Dam in Northern California is the tallest dam in the United States at 770 feet. In this flyover showing the continuing repair work on the dam's spillway, you can see just how enormous the structure is. In February 2017, the main and emergency spillways failed, leading to the evacuation of 188,000 people living near the dam. Repairs are expected to exceed $500 million. The project is on schedule to finish pouring concrete on the main spillway by Nov. 1, 2017.
Work to repair and reconstruct the main spillway at Oroville Dam has been under way since April 2017. By November 1, 2017, the main spillway at Lake Oroville is expected to be ready to handle releases of up to 100,000 cubic feet per second. When fully reconstructed, it's expected to handle 270,000 cfs, according to news reports. This video of the repair progress was posted October 17, 2017.
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Crews continue laying roller-compacted concrete in the middle of the Lake Oroville spillway, filling the erosion area to connect the upper and lower chutes in this update on the repairs at the dam. The state Department of Water Resources said last month that reconstruction of the spillway is on track to reach a Nov. 1 deadline.
This September 25, 2017 video shows progress on the Oroville Dam spillway. In February, the spillway at the nation's tallest dam was damaged, placing tens of thousands of people in the Butte County community of Oroville under evacuation orders due to the threat of flooding. The crisis began after heavy rain from one of the wettest winters on record.