The U.S. Geological Survey has several sites and maps which gives information on hydrology , including current national streamflow conditions and groundwater studies . Hydrology is the study of water resources and their relationship with the environment. Another site is maintained by Purdue's Environmental Education program. It includes a multi-media presentation on groundwater that includes background vocabulary, information, graphics and pictures. You may also want to check out NMP's mountain environments resource page for other sources.
Mill Creek is located just northeast of the upper-western most corner where Wyoming meets Montana.
Yellowstone park is just south of the region and the Yellowstone river flows through here. Click on icons to see larger images. May take a few minutes. Discuss geographic features. The creek site this activity will explore is located in the Gallatin National Forest .