In the late 1840s, Solomon Juneau, a French Canadian agent for the American Fur Company and founder of Theresa and Milwaukee, built a dam here on the Rock River. A flume diverted water to power his grist and saw mill located 70 yards downstream. The dam created a flowage of 2,000 acres that provided fine boating and fishing and was known as Lake Theresa. The dam was removed in 1895.