The dam wall was raised in 1958 by the addition of gates; stabilised using ground anchors in 1989; and upgraded in 2003 to enable it to withstand overtopping.
42.
In December 2010, an independent panel of engineers published a study that determined the cause of the failure " was internal erosion in the embankment coupled with overtopping flow ".
43.
An extreme risk of embankment failure, or " overtopping ", of the spillway in the Tailings Storage Facility due to water volumes has also been identified, requiring immediate action.
44.
Lake waters rose some from April 1 through May 12 of that year, and by May 26 had risen another sixteen feet, overtopping the spillway elevation for the first time.
45.
A beam may be made of concrete or steel-many shorter bridges, especially in rural areas where they may be exposed to overtopping and corrosion, will utilize concrete box beams.
46.
Woodhead as the fountainhead would have the most extensive improvements, and with these completed there was no danger at Rhodeswood of overtopping; however, there was weakness in the north spillway.
47.
The erosion of the dam's material by overtopping runoff will remove masses of material whose weight holds the dam in place and against the hydraulic forces acting to move the dam.
48.
When evaluating wave energy as a technology type, it is important to distinguish between the four most common approaches : point absorber buoys, surface attenuators, oscillating water columns, and overtopping devices.
49.
Reclamation experts are predicting that they can handle the increased snow melt without an artificial flood, without risking an overtopping of the dam with an uncontrolled flood, and without losing electric-generating potential.
50.
The State conducted investigations including looking at eyewitness accounts, weather and hydrological data, laboratory and " in situ " tailings testing, satellite imagery, and overtopping studies using a scale model.
