Montana Department of Transportation

Malcolm “Mack” Long, Director


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Storm Water Management Program Update

Public Input Requested for MDT's Storm Water Management Program Update

Storm Water Runoff and Protecting State Waters

Why should Montanans care about storm water? Montana’s streams, lakes, and wetlands are valuable resources that contribute to our economy, public health, and ecosystems. No matter where you live in Montana – when it rains, the water needs to go somewhere and can runoff directly to state surface waters. Runoff can pick up sediments, nutrients, chemicals and pathogens and pollute our surface waters, negatively impacting water quality. To learn more about storm water, please visit MDT’s Stormwater Information page.

MDT's Storm Water Management Program

bridge under construction

To protect Montana’s surface water resources, MDT implements a statewide Storm Water Management Program (SWMP). This program is intended to reduce the discharge of pollutants from our transportation infrastructure into local surface waters. Components of this program include:

  • Public education to raise awareness of behaviors and activities that impact storm water and to motivate action to reduce pollution;
  • Strategies to involve key target audiences in the development and implementation of the SWMP;
  • Detection and elimination of illicit (i.e. unauthorized) discharges;
  • Reduction of pollutant runoff from construction activities;
  • Control of storm water runoff from new development and redevelopment projects; and
  • Implementation of an operation and maintenance program, including training, that prevents or reduces pollutant runoff from MDT operations.

In accordance with regulatory requirements, MDT’s SWMP is specifically targeted to control storm water pollutant discharges in the following urban areas: Billings, Missoula, Great Falls, Butte, Helena, Kalispell, and Bozeman. The SWMP is the formal document that contains the strategies MDT is taking to reduce storm water runoff pollution into Montana’s waterbodies.

Public Input Request

MDT is currently taking action to update the SWMP and is asking for public input to improve the function of the program and further protect water quality. MDT’s current SWMP is available online at the following location: Stormwater Management Program ( If you have areas of concern regarding storm water discharges from MDT’s transportation infrastructure and/or suggestions to improve other areas of the program listed above, please complete the public comment form by selecting “MS4 SWMP Update” from the ”Commenting on a project or activity” dropdown list, or email comments to the following address: Alternatively, comments can be mailed to the following physical address:

Montana Department of Transportation
Environmental Services Bureau
Attention: Tom Gocksch, P.E., Environmental Engineering Section Supervisor
2701 Prospect
PO Box 201001
Helena, MT 59620-1001

It is MDT’s intent to complete revisions to the current SWMP by the end of 2021. Once the revised SWMP is drafted, it will be offered for public review and comment before finalizing. If you have any questions, please feel free to contact Tom Gocksch at 406-444-9412.