Glacial Lakes and Prairies, South Dakota Area Lakes and Reservoirs
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Lake Thompson
Lake Thompson is the second largest natural lake in South Dakota encompassing 18,000 acres. Lake Thompson was formed in the glacier age, but in the 1930s, the lake was completely dry and used for pasture. In the 1980s, the area was a 9,000-acre marsh. Heavy rains and snowmelt in the mid 80s filled ... Continue