Lake Yankton, also known as Brockway Crossing, is a gravity dam located in Lyon County, Minnesota, with a primary purpose of flood risk reduction. Completed in 1942, this dam stands at 8 feet high and spans 17 feet in length, with a storage capacity of 380 acre-feet and a drainage area of 4.6 square miles. The dam is state-regulated and undergoes regular inspections to ensure its structural integrity and satisfactory condition.

Situated on Dog Creek-TR, Lake Yankton serves as a crucial water resource in the region, offering flood protection and storage for the surrounding area. With a low hazard potential and a history of satisfactory condition assessments, this dam provides a sense of security for residents in Balaton, Minnesota, and beyond. The dam's location within the Rock Island District and its oversight by the Minnesota Department of Natural Resources further underscore its importance in managing water resources in the area.

Lake Yankton's role in flood risk reduction, coupled with its efficient design and state regulation, highlights its significance as a vital infrastructure for water management in Lyon County. As climate change continues to impact water resources, the presence of well-maintained structures like Lake Yankton becomes increasingly essential in safeguarding communities against potential flooding events. With a history dating back to 1942, this gravity dam stands as a testament to the ongoing efforts to protect and manage water resources in Minnesota.