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NWE Contact Bar, in Montana dial 1-888-467-2669, in South Dakota or Nebraska dial 1-800-245-6977

NorthWestern Energy developed a water quality and biological monitoring program for the Missouri and Madison Rivers to identify long-term
trends and spatial variation of water quality and biological parameters throughout the system, as well as to evaluate the effects of operation and maintenance of the hydroelectric facilities on these rivers. This page provides detailed information about this program and its components.
For more information, see our Missouri-Madison Water Quality Program brochure.

For questions please contact:

Jordan Tollefson
Hydro Compliance Professional
Office (406) 443-8907

Andy Welch
Manager, Hydro License Compliance
Office (406) 444-8115

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Water Quality Monitoring

Madison River Thermal Program

Madison River Flushing Flow Program

Missouri-Madison Reservoirs Shoreline Erosion Plan

Great Falls Reservoirs Drawdown Plan

Hebgen Lake Toxic Algae Program
Toxic Algae Plan | 2017
Contact Information
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