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Oroville spillway damage DWR Picks Board of Experts on Oroville Spillway Situation
DWR has chosen five experts to form an Independent Board of Consultants to assess operations, conditions, and risk reduction actions being taken at Lake Oroville in response to erosion damage to Oroville Dam’s main spillway that began February 7. DWR also asks two national dam associations to empanel an independent team to investigate the possible causes of the spillway damage. These actions are described in a letter to the Federal Energy Regulatory Commission. (02/21/2017)
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Oroville spillway Oroville Spillway Incident Update - Feb. 20 AM
The Department of Water Resources increased outflow from the Oroville Dam flood control spillway yesterday, from 55,000cfs to 60,000cfs, in anticipation of the expected increase in inflows.
This proactive measure is typical of normal flood control operations and is in anticipation of forecasted weather conditions. The increase is temporary and is expected to better balance water flow in and out of the reservoir.
These measures are consistent with DWR’s established plan objectives to continually manage lake levels, water flow, and support construction activities. (02/20/2017)
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water release from Oroville spillway Oroville Spillway Incident Update - Feb. 19 PM
This afternoon, the Department of Water Resources increased outflow from the Oroville Dam flood control spillway, from 55,000cfs to 60,000cfs.
This proactive measure is typical of normal flood control operations and is in anticipation of forecasted weather conditions. The increase is temporary and is expected to better balance water flow in and out of the reservoir.
These measures are consistent with DWR’s established plan objectives to continually manage lake levels, water flow, and support construction activities. (02/19/2017)
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Oroville Oroville Spillway Incident Update - Feb. 19 AM
Today, flow from the Oroville Dam Flood Control Spillway will remain at 55,000 cfs and continue to outpace the inflow encountered. The reduction in flow has allowed assessment teams to view debris buildup and dredge debris piles below the flood control spillway. (02/19/2017)
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Oroville Oroville Spillway Incident Update - Feb. 18 PM
Today flows were reduced to 55,000 cfs and continued to outpace the inflow encountered. The reduction in flow allowed assessment teams to view debris buildup and dredge debris piles below the flood control spillway. (02/19/2017)
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Oroville spillway damage 02-17-2017 - 3 Oroville Spillway Incident Update - Feb. 18 AM
Lake elevations continue trending downward and have fallen more than 45 feet from the height of the emergency spillway. Outflows continue to outpace flow into the reservoir and the goal of achieving a reservoir depth of 850 feet remains a priority. As runoff flows into the reservoir, water levels will likely fluctuate but will remain within acceptable and typical depths during times of storm activity. (02/18/2017)
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Oroville spillway damage 02-17-2017 Oroville Spillway Incident Update - Feb. 17 PM
As of this evening, 70,000 cubic feet per second (cfs) of water is being released from the flood control spillway and inflows into the reservoir are 30,000 cfs. Currently, the elevation of the lake is slightly more than 858 feet; over 40 feet below the height of the emergency spillway.
Despite current inclement weather, DWR construction crews continue to repair erosion and remove debris from below the emergency spillway. Rock, aggregate and cement slurry continue to be placed into areas affected by erosion after use of the emergency spillway. (02/18/2017)
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Oroville Reduction DWR To Continue Outflow Reduction - Feb. 17 PM
Oroville, Ca.-At 1:00 PM this afternoon, the Department of Water Resources will once more begin reducing outflow from the Oroville Dam flood control spillway incrementally from 80,000 cfs to 70,000 cfs to support the removal of debris from the diversion pool located near the spillway. (02/17/2017)
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Oroville Spillway Oroville Spillway Incident Update - Feb. 17 AM
Despite current inclement weather, DWR construction crews continue to repair erosion below the emergency spillway. Rock, aggregate and cement slurry are being used to repair and backfill the affected areas. (02/17/2017)
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Oroville spillway damage Oroville Spillway Incident Update - Feb. 16 AM
This morning, the lake level sits at 32 feet below the emergency spillway height. Despite weather conditions, crews continue to work around the clock and are making progress with emergency repairs.
Barges and cranes have been mobilized to remove debris and sediment from the diversion pool. These efforts are designed to restore the normal flow of water into the diversion pool and through the Hyatt power plant.
100,000 cfs of water continues to flow through the flood control spillway in an effort to accommodate anticipated inflow from upcoming storms. These storms are forecasted to bring colder temperatures and inflows are anticipated to increase to 45,000 cfs. However, lake levels will continue to decrease. (02/17/2017)
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