Silver Lake is a reclaimed lake located immediately east of De Smet, on the north side of U.S. Highway 14. Big Slough is a marsh connected to the southwest end of Silver Lake. Silver Lake and Big Slough were written about extensively by Laura Ingalls Wilder in her novel By the Shores of Silver Lake. Caroline Ingalls named the lake for the silvery appearan…Silver Lake is a reclaimed lake located immediately east of De Smet, on the north side of U.S. Highway 14. Big Slough is a marsh connected to the southwest end of Silver Lake. Silver Lake and Big Slough were written about extensively by Laura Ingalls Wilder in her novel By the Shores of Silver Lake. Caroline Ingalls named the lake for the silvery appearance of its surface. The Ingalls home and Surveyor's House are very close to it. The lake is a "prairie pothole," a depression in which rain and snow-melt collect without any outlet that regulates its level. A drainage ditch to nearby Lake Henry was built in the 1920s with the support of local land owners to prevent the lake from fluctuating and flooding the surrounding land. The dry lakebed was used as a rubbish dump, although a portion of the lake has since filled again with water.
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