The largest limestone bedrock spring in the Twin Cities is Camp Cold Water Springs in Minneapolis. About 144,000 gallons of water flow through the spring each day (Jeffery, 2000). However, concerns that the Hwy 55/Hiawatha Light Rail project may have altered flow in this historic site led to the MCWD conducting weekly discharge monitoring since August 2006. The monitoring results are being used to verify that the Highway 55 project did not affect the flow of Camp Cold Water Springs.

The area also contains a limestone well tower and pump house that was built in the 1880s with a reservoir holding pond that was expanded by Fort Snelling soldiers. The fort had access to the spring water until the 1940s (Jeffery, 2000). The reservoir flows underground through a culvert toward the Mississippi River.

Jeffery, S. 2000. A History of Camp Coldwater. Preserve Camp Coldwater Coalition, Minneapolis, MN. http://www.preservecampcoldwater.org/