Today the Department of Water Resources (DWR) provided an update on construction activities on the Lake Oroville Spillways Emergency Recovery Project.
Construction on the Main Spillway
• General site cleanup, concrete finishing, joint sealing and completion of drainage systems continues at the 3,000-foot gated flood control spillway, also known as the main spillway. This finishing work is expected to be complete by the end of 2017.
• As noted previously on November 1, the main spillway has been substantially reconstructed to handle flows of 100,000 cubic feet per second for the 2017/2018 flood season.
• The structural concrete sections of the main spillway have cured as anticipated. FERC has agreed with DWR that there are no repairs needed.
• Construction will resume on the main spillway in spring of 2018, likely in May. The exact date will be determined by hydrology and snowpack conditions.
Construction at the Emergency Spillway
• Work continues at the emergency spillway. The underground secant pile wall is on schedule for completion in January 2018.
• Crews have completed approximately 60 percent of the secant pile wall.
• Earlier this month, crews began excavation of bedrock to prepare the site for construction of the roller-compacted buttress and splash pad below the emergency spillway in 2018.
• DWR has posted memo #13 from the independent Board of Consultants recapping the 13th meeting. DWR is meeting with the BOC for the 14th time this week.