310 PERMIT

The 310 Permit is required for certain projects that physically alter or modify the bed or banks of a perennial stream in Montana.

The permit helps protect the natural condition of streams, minimize sedimentation and recognize beneficial uses of Montana’s waterways. Local Conservation Districts administer the 310 Law.

AGENCY: Conservation Districts

  • WHO IS THIS PERMIT FOR?

    A 310 Permit is for private individuals and nongovernmental entities planning work that physically alters or modifies the bed or banks of a perennial-flowing stream.

    The permit is administered by the local Conservation District where the project is located.

    Find Your Conservation District →

  • DO I NEED 310 PERMIT?

    You need a 310 Permit if you are a private individual or nongovernmental entity proposing work that will physically alter or modify the bed or banks of a perennial-flowing stream.

    See examples of 310 projects →

APPLY AND SUBMIT

  • 1. COMPLETE JOINT APPLICATION IN GILLY

    1. Create an account or log in

    2. Start a new application

    3. Select 310 Permit under the permits that apply to your project

    4. Complete the required application information

    5. Save your progress and return as needed

  • 2. SUBMIT YOUR 310 APPLICATION

    Complete your 310 application in Gilly, then submit it to your local Conservation District through Gilly.

    Gilly handles how the application is delivered to your Conservation District.

    Find out your conservation district here

  • REVIEW:

    Your Conservation District reviews the application and may conduct a site inspection. They can also help identify whether additional permits or agency approvals may be needed.

  • FEE:

    NO FEE for application

  • REVIEW TIME:

    Each conservation district varies, depending on project complexity and completeness of application.

  • ADDITIONAL PERMITS NEEDED:

    Project depending

Examples of Projects Requiring a 310 Permit

  • Requiring a 310 Permit. Bridges and Culverts: Installation, removal, or repair of bridges and culverts that cross or are in a perennial stream. Apply with the Joint Application

    Bridges and Culverts:

    Installation, removal, or repair of bridges and culverts that cross or are in a perennial stream. 

  • Requiring a 310 Permit. Bank Stabilization: Projects aimed at protecting or stabilizing streambanks, such as using riprap or other methods. Apply with the Joint Application

    Bank Stabilization:

    Projects aimed at protecting or stabilizing streambanks, such as using riprap or other methods. 

  • Requiring a 310 Permit. Fences and Decks: Construction of fences, decks, and other structures near or in a stream. Apply with the Joint Application

    Fences and Decks:

    Construction of fences, decks, and other structures near or in a stream. 

  • Agricultural projects: Headgate

    Agricultural Projects:

    Modifications to irrigation diversions, headgates, and ditches. 

  • Recreational Structures:

    Recreational Structures:

    Building boat ramps and docks. 

  • Requiring a 310 Permit. Dams and Ponds: Creating or modifying dams and ponds. Apply with the Joint Application

    Dams and Ponds:

    Creating or modifying dams and ponds. 

  • Requiring a 310 Permit. Channel and Bank Alterations: Dredging, channel changes, and other activities that physically modify the stream's course or bed. Apply with the Joint Application

    Channel and Bank Alterations:

    Dredging, channel changes, and other activities that physically modify the stream's course or bed. 

  • Requiring a 310 Permit. Projects can include sandbagging, utility installation and maintenance, and removal of debris. Apply with the Joint Application

    Other Projects:

    This can include sandbagging, utility installation and maintenance, and removal of debris.