By 1981, the dam had a new look: the narrow road atop the dam was closed and replaced with a domed concrete cap. Also, a concrete slope was added to the dam's downstream side to reduce structural ...

Rainwater erosion alongside the Oroville Dam’s main spillway appears to have contributed to the heavy damage that prompted a crisis, forcing more than 100,000 to be evacuated from their homes, a ...

On Feb. 11, the elevation rose to 901 feet, causing water to flow over a weir into the dam’s unpaved emergency spillway and erode a deep fissure into an earthen slope that helps support the 770 ...

Oroville Dam: Bigger walls, thicker concrete, ... “Folsom stepped the slabs every 7 to 30 feet once the slope was more than 30 degrees and depending how steep the slope,” Souder wrote.

Feb. 8 (UPI) --Engineers say there is no threat to the Oroville, Calif., dam spillway, closed after massive sections of eroded concrete were noticed. The state's Department of Water Resources ...

In contrast, concrete dams can withstand overtopping, particularly if they are designed to do so. The Forest Lake dam, downstream of Cary Lake, held up during the October 2015 storm, researchers said.

The actual danger here is that the headward erosion will erode the slope up to the base of the weir, causing the collapse of the concrete wall of the emergency spillway. (The Oroville Dam itself ...

OROVILLE, Calif. — The rock-and-slurry armor workers are applying to a damaged California spillway is a patchwork fix no one wants to test.patchwork fix no one wants to test.

Maybe the Oroville Dam was cursed from the start. In December 1964, three years into the massive barrier’s construction, a huge flood struck the northwest, killing dozens. The dam was nearly ...

In the late 1990s, the Lake Tranquility dam was categorized as a Class I structure, a dam that — if breached — could result in loss of life or property downstream. The township was told to fix ...

The slope between the dam’s foundation and ... consisted of 40% fly ash—a composition that is different than that described in the generic existing guidelines for concrete dams at ICOLD ...

By 1981, the dam had a new look: the narrow road atop the dam was closed and replaced with a domed concrete cap. Also, a concrete slope was added to the dam's downstream side to reduce structural ...