310 PERMIT

The 310 Permit is required for private, nongovernmental work that physically alters or modifies the bed or banks of a perennial-flowing stream in Montana.

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 A 310 PERMIT?

You need a 310 Permit if your project will physically alter or modify the bed or banks of a perennial-flowing* stream.
*A perennial-flowing stream is a stream that normally has flowing water throughout the year.
See Examples of 310 Projects →

APPLY & SUBMIT

BEFORE YOU START:

See what information, photos, plans and project details you may want to have ready.
Prepare Before You Apply →

1. COMPLETE THE JOINT APPLICATION FORM IN GILLY

Create an account, start your application and work through the required project information. Gilly saves your progress as you go.
2. SUBMIT TO YOUR LOCAL CONSERVATION DISTRICT

When your application is complete, submit it through Gilly.
Gilly sends your 310 application to your local Conservation District.
After submitting, download a copy of your completed application for your records.
Find Your Conservation District →

REVIEW:

Your Conservation District can help identify whether other permits or agency approvals may also be needed.
REVIEW TIME:

30–60 days after the application is accepted.
FEE:

No application fee.
ADDITIONAL PERMITS NEEDED:

Your Conservation District can help identify whether other permits or agency approvals may also be needed.

EXAMPLES OF PROJECTS REQUIRING A 310 PERMIT

Bridges and Culverts:

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

Projects aimed at protecting or stabilizing streambanks, such as using riprap or other methods.
Fences and Decks:

Structures placed in or near the stream where construction may alter the bed or banks.
Agricultural Projects:

Modifications to irrigation diversions, headgates, and ditches.
Recreational Structures:

Building boat ramps and docks.
Dams and Ponds:

Creating or modifying dams and ponds.
Channel and Bank Alterations:

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

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