Dam breaches

Vegetation thrives where a boat ramp once did at the Sanford Lake Marina, while erosion could threaten homes on the opposite shore of what was once Sanford Lake, July 30, 2020, near Sanford, Mich. Nature is returning to the dry beds of a string of mid-Michigan lakes that drained in May after two dams failed during torrential rains. (AP Photo/ Jeff McMillan)

FILE - In this May 29, 2020 file photo, two cars are flipped over after major flood damage, in Sanford, Mich. Sanford village, with a population of 859, is pulling together after the devastation of two dam failures in May. Volunteers are still clearing muck and providing supplies to those whose homes were destroyed since there's no telling when major state and federal help will come.(Kaytie Boomer/The Bay City Times via AP File)

In this Wednesday, May 20, 2020, photo, people survey the flood damage to the Curtis Road Bridge in Edenville, Mich., over the Tittabawassee River. The bridge sits just south of Wixom Lake where the dams failed. (Neil Blake/The Grand Rapids Press via AP)

Ryan Stadelmaier, 16, gives a piggyback ride to his sister Rachel Stadelmaier, 27, as they cross Walden Woods Drive while helping residents tend to their flooded homes, Wednesday, May 20, 2020, in Midland, Mich. (Katy Kildee/Midland Daily News via AP)

Dan Dionne looks over his former deck outside his home, Wednesday, May 20, 2020, in Edenville, Mich. Some people living along two mid-Michigan lakes and parts of a river have been evacuated following several days of heavy rain that produced flooding and put pressure on dams in the area returned to the area to survey the damage. (AP Photo/Carlos Osorio)

Mark Musselman brings a chair to the front of his house from the back yard, wading through floodwater, Tuesday, May 19, 2020 in Edenville, Mich. People living along two mid-Michigan lakes and parts of a river have been evacuated following several days of heavy rain that produced flooding and put pressure on dams in the area. (Katy Kildee/Midland Daily News via AP)

FILE - This combination of file photos provided by the Nebraska Department of Natural Resources, shows the Spencer Dam near Spencer, Neb., in November 2013, top, when it was holding back water on the Niobrara River and again in March 2019, after the dam failed during a flood. The dam that collapsed under pressure from an icy flood had a history of unaddressed ice issues and had no formal emergency plan because regulators wrongly assumed that no one would die if it failed, according a report released Tuesday April, 21, 2020. (Nebraska Department of Natural Resources via AP)

FILE - In this Feb. 11, 2020, file photo provided by the Mississippi Emergency Management Agency, area officials monitor a potential dam/levee failure in the Springridge Place subdivision in Yazoo County, Miss. Heavy rains and recent flooding across the Southeastern U.S. have highlighted a potential public safety concern for some dams. An Associated Press review has identified hundreds of high hazard dams in the South that lack formal emergency action plans. (David Battaly/Mississippi Emergency Management Agency via AP, File)

County officials work on the Oktibbeha County Lake Dam, Tuesday, Jan. 14, 2020, near Starkville, Miss., after County Engineer Clyde Pritchard warned the dam's failure was imminent. Emergency management officials in one Mississippi county say heavy rains could cause a failure in the dam at Oktibbeha County Lake and they're urging residents near there to evacuate as a precaution. (Brad Robertson/The Starkville Daily News via AP)