Oroville Dam emergency spillway fails as cracks threaten California reservoir
California's Oroville Dam is using its emergency spillway for the first time after cracks and erosion damaged the main structure. Water levels near 890 feet as repairs continue.
English · Original discussion in Spanish · Published
Oroville Dam emergency spillway fails as cracks threaten California reservoir
The Oroville reservoir in California is being forced to use its emergency spillway for the first time in its history after cracks and erosion were detected in the main spillway.
Data from the California Department of Water Resources (DWR) points to a water level of 889–890 feet, just 18 feet below the 908-foot barrier that would trigger a total flood. The emergency spillway, designed for excess water, has become the only discharge route.
Repairs began on 14 February after faults were detected on 12 February during a controlled test. Workers have poured concrete and applied shot‑crete to the face of the spillway, and a live webcam is tracking pogre.
The main spillway, a 1963 concrete ramp, suffered a series of failures: a sinkhole, erosion at its base and vibrations detected by DWR sensors. The emergency spillway, used only once in 1987, is now the only conduit for excess water.
Residents of Sacramento and surrounding counties are expressing concern. Sacramento, the largest city within the flood zone, could be inundated if the structure fails. A 2017 report estimated that a breach could displace up to 1,000 cubic hectometres of water.
Experts are debating whether the repairs are sufficient. Some argue that the concrete shot‑crete may not withstand the erosive force of the water, while others believe the current measures will buy time until a permanent solution is designed.
The DWR has issued a statement indicating that the spillway will remain in use until the water level falls below 890 feet. It also notes that the reservoir has a capacity of 3.4 million acre‑feet and that inflow exceeds discharge by more than double.
Meanwhile, the state has requested additional funding to reinforce the dam's foundations, citing the 2017 incident when the main spillway broke and the emergency one was activated for the first time in history.
The situation remains fluid. The livestream shows the water level rising almost two feet in 24 hours, a rate that could reach 901 feet by the end of the week. If that happens, the emergency spillway will have to discharge more water, accelerating erosion.
In the absence of a definitive resolution, the conversation continues. The DWR has committed to carrying out a full structural assessment and involving federal agencies in the repair plan. The public will have to wait for the results of those investigations.
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The Oroville reservoir in California is being forced to use its emergency spillway for the first time in its history after cracks and erosion were detected in the main spillway.
Data from the California Department of Water Resources (DWR) points to a water level of 889–890 feet, just 18 feet below the 908-foot barrier that would trigger a total flood. The emergency spillway, designed for excess water, has become the only discharge route.
Repairs began on 14 February after faults were detected on 12 February during a controlled test. Workers have poured concrete and applied shot‑crete to the face of the spillway, and a live webcam is tracking pogre.
The main spillway, a 1963 concrete ramp, suffered a series of failures: a sinkhole, erosion at its base and vibrations detected by DWR sensors. The emergency spillway, used only once in 1987, is now the only conduit for excess water.
Residents of Sacramento and surrounding counties are expressing concern. Sacramento, the largest city within the flood zone, could be inundated if the structure fails. A 2017 report estimated that a breach could displace up to 1,000 cubic hectometres of water.
Experts are debating whether the repairs are sufficient. Some argue that the concrete shot‑crete may not withstand the erosive force of the water, while others believe the current measures will buy time until a permanent solution is designed.
The DWR has issued a statement indicating that the spillway will remain in use until the water level falls below 890 feet. It also notes that the reservoir has a capacity of 3.4 million acre‑feet and that inflow exceeds discharge by more than double.
Meanwhile, the state has requested additional funding to reinforce the dam's foundations, citing the 2017 incident when the main spillway broke and the emergency one was activated for the first time in history.
The situation remains fluid. The livestream shows the water level rising almost two feet in 24 hours, a rate that could reach 901 feet by the end of the week. If that happens, the emergency spillway will have to discharge more water, accelerating erosion.
In the absence of a definitive resolution, the conversation continues. The DWR has committed to carrying out a full structural assessment and involving federal agencies in the repair plan. The public will have to wait for the results of those investigations.
SFGate article
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Summary of a discussion on Burbuja.info - Foro de economía, actualidad y política., translated from Spanish and reviewed before publication. Read the full discussion (4103 replies).
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