The NPS monitors the flow of water from Coldwater Spring. This establishes an understanding of base flow and enables for observations of change. The spring and reservoir are contributing elements to the Fort Snelling National Historic Landmark, and any changes to the flow of the spring represent a potential impact to this landmark.
The water is collected using the "Bucket Fill" method which uses a bucket and stopwatch. The bucket is placed under the flow of water and the time it takes to completely fill is recorded. This process is repeated 3 times and the results are averaged.
The monitoring is conducted at two locations. The first is from a pipe that exits the southwest corner of the springhouse. The second is from a limestone rock where Wetland A drains south of the springhouse and reservoir.
Last updated: December 30, 2020