Spring Valley is a village in Pierce and St. Croix counties in Wisconsin, United States.

This privately held natural attraction, formed millions of years ago by ground water eroding the sandstone and dolomite that underlies the area, has been open to tourists since 1942.

It was excavated, developed and promoted to the public by an Eau Claire, Wisconsin amateur geologist and advertising man.

The owners have retained the flavor of the 1950s and enjoy sharing the site's geologic history with visitors.

Promoted as the Midwest's largest earthen dam, Eau Galle Dam and Recreation, northwest of town, was built by the Army Corps of Engineers in 1965 to protect Spring Valley from the Eau Galle River's surging flood waters.

A recreational area has grown up around the dam's reservoir, Lake George.

26.9% of all households were made up of individuals, and 11.5% had someone living alone who was 65 years of age or older.

30.5% of all households were made up of individuals, and 16.8% had someone living alone who was 65 years of age or older.