A bridge over Green Creek in Bridgeport, Calif., was damaged on June 20, 2017, after flood warnings were issued by the National Weather Service in Reno, who said that high temperatures were contributing to rapid snowmelt in high-elevation basins. The nearby Twin Lakes Resort posted footage of the bridge damage to Instagram, commenting: “Green Creek, once that little trickle, is now strong enough to rip apart the bridge.”
As the heat rises, repair work at the Oroville Dam spillway continues in this June 20, 2017. With temperatures forecast in the area for 110 degrees or more, protections are in place for construction employees, Jeff Petersen, Kiewit's project director, said in a news call Wednesday morning, as reported by the Chico Enterprise-Record.
Not so long ago, California was in the middle of a deep drought but in June its snow water equivalent rose to a heaping 170 percent of normal. NASA shows in its latest video that satellites were capturing that change.
Oroville Dam’s main flood control spillway cracked in two Feb. 7, leaving an enormous chasm that hindered water releases and eventually triggered the evacuation of 188,000 downstream residents. On Wednesday, July 7, 2017, state officials said they’re making good progress on phase 1 of the spillway’s reconstruction, which will last through 2018. In this video, Kiewit, the company charged with repairing the Lake Oroville spillway, begins pouring concrete in the lower section of the chute onto recently cleaned rock.
Department of Water Resources tests the siren at Oroville Dam spillway on Friday, June 2, 2017 at noon. Future tests will happen the first Friday of every month. The new siren was installed to replace the one that was lost in February as water flowed down the emergency spillway. Repairs on the spillway are continuing with the goal of having it operational by the rain season.
As of June 1, 2017, the central Sierra snowpack had about ten times more water than it did on the same day in 2016. In several recent years, no water was recorded at all on June 1. This series of satellite images shows the snow accumulation from space at roughly the same time of year for the past five years.
The Department of Water Resources are using controlled blasting methods to break up intact rock on the slopes along the damaged gated flood control spillway at Oroville Dam. Crews report they're a week ahead of schedule, which is important with a wet season deadline that's just months away.
The reconstruction of Oroville Dam’s flood-control spillways is taking place, and California officials vow the structures will become stronger and safer than ever. Here's a look from above in a video taken this week.
With the spillway gates closed, Kiewit Infrastructure begins demolition work on the lower chute of the spillway. This area, shown on May 21, 2017, is known as “The Bridge” for the stretch of concrete that spans the erosion area beneath it. Reconstruction efforts will be conducted in phases, the Department of Water Resources said. This year’s work will focus on rebuilding the upper and lower portions of the main spillway and creating a cut-off wall on the emergency spillway. DWR's goal is to get systems in place by Nov. 1, 2017, to ensure safe management for the winter weather.
An updated look (May 16, 2017) shows the Kiewit Corp. mobilizing for repair work at the Oroville Dam spillway boat launch parking lot, the main spillway flowing at 20,000 cubic feet per second, and the continued excavation of the left slope to allow access into the canyon for repair work.