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Up to 100 homes in Manawa in central Wisconsin, including a nursing home, were evacuated Friday after erosion caused the bank at the edge of the Manawa Mill Pond dam to fail.
"In the years to come, state and local leaders face difficult choices about where to invest in maintaining and improving dams," a new report said.
The Manawa Dam itself appears in tact and did not fail, Severson said at a Friday news conference, but there is a lot of erosion on the north side of the structure and in the land surrounding the dam.
The condition of the dam was not available in the online data. As the storms swept the Chicago area late Monday, employees at a suburban weather service office had to pass coverage duties to a Michigan post for five minutes. The agency reported wind speeds in the region as high as 75 mph (120 kph).
Following is a list of dams and reservoirs in Wisconsin.. All major dams are linked below. The National Inventory of Dams defines any "major dam" as being 50 feet (15 m) tall with a storage capacity of at least 5,000 acre-feet (6,200,000 m 3), or of any height with a storage capacity of 25,000 acre-feet (31,000,000 m 3).
The lake became nearly empty and the escaping flood water created a new channel for the Wisconsin River about a quarter mile away from the dam. [49] [50] Wisconsin National Guard engineers began repairs on the dam the same day, but with the breach being about 400 feet (120 m) wide, the repairs weren't expected to be completed for over a year. [51]
The company had completed the Kilbourn Dam upriver at Wisconsin Dells in 1909, but found it unprofitable, leading to the decision to build a larger dam at Prairie du Sac. [4] Construction of the new dam began in the winter of 1911 with general contractor J. O. Heyworth of Chicago and a crew of around 400 laborers. [5]
The dam breach happened after the National Weather Service said a deluge of about 5 inches (12.7 centimeters) of rain fell on that area of eastern Wisconsin in a few hours Friday.