Flood in Bon Homme County, South Dakota

Rainfall amounts across Bon Homme County from June 20-22 ranged from 2 to 3 inches with an estimated 5 to 6 inches across the far northern portion of the county. Overland flooding ensued with additional major flooding along the James River.

One home experienced a partial basement collapse and 3 businesses received flood damage.

During peak flooding on June 21, water was overflowing at least 60 roads county-wide with the worst impacts north of South Dakota Highway 46, including South Dakota Highway 25 and the intersection of South Dakota Highways 46 and 37. Water also overran South Dakota Highway 50 near the Bon Homme Golf Course. Preliminary damage assessments estimate loss to public infrastructure across the county to be nearly 1.17 million dollars.

The majority of overland flooding subsided by June 22, but river flooding continued through the end of the month. For additional information on river flooding, please see other flood entries for Bon Homme County.

A multi-day significant heavy rainfall event from June 20-22 resulted in widespread rain totals between 5 and 10 inches with pockets in excess of 15 inches across portions of southeast South Dakota, northwest Iowa, and southwest Minnesota. As rainfall reached area streams and rivers, major to record flooding was observed, devastating several towns and communities. Extensive overland flooding also resulted in significant impacts and damages. All river crest information is preliminary until made official by the gauge owner.

A Presidential Disaster Declaration was signed for Aurora, Bon Homme, Brule, Charles Mix, Clay, Davison, Douglas, Gregory, Hanson, Hutchinson, Lake, Lincoln, McCook, Miner, Minnehaha, Moody, Sanborn, Turner, Union, and Yankton Counties.