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Discharges Associated with
Portable Suction Dredges

The purpose of the Portable Suction Dredge General Permit (General Permit) is to regulate wash water effluent from portable suction dredges, to state waters in accordance with effluent limitations, monitoring requirements and other conditions set

Montana Stream
Source: Photo courtesy of Carrie Greeley,
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forth in Parts I, II, III and IV of the General Permit. A written authorization letter from the Department is required before an applicant is authorized to discharge under the General Permit.

New Applicants:

Step One: Identify the fisheries biologist assigned to the area you proposed to suction dredge using the map found here.

Step Two: Look up the contact information of fisheries biologist identified in Step One using the website found here. Contact the assigned biologist and ask for the seasonal stream restriction for the area of proposed suction dredging.

Step Three: Read the Portable Suction Dredging General Permit found here and ensure you meet the eligibility requirements of the permit and understand how to comply with the permit.

Step Four: Download the application form Notice of Intent (NOI) to discharge under the general permit found here. Fill out the NOI completely and send to the address found on the first page of the application instructions along with the appropriate application fee (also found on the first page of the application instructions). Ensure the seasonal stream restriction information provided by the fisheries biologist from Step Two is inserted in Section E of the application.

The map found here may be useful in finding location information such as latitude and longitude, and/or township, range, and section needed for the application.

Renewal Applicants:

Step One: Read the Portable Suction Dredging General Permit found here and ensure you meet the eligibility requirements of the permit and understand how to comply with the permit.

Step Two: If your proposed activity meets the requirements in the general permit download the application form Notice of Intent (NOI) to discharge under the general permit found here. Fill out the NOI completely and send to the address found on the first page of the application instructions along with the appropriate application fee (also found on the first page of the application instructions).

The map found here may be useful in finding location information such as latitude and longitude, and/or township, range, and section needed for the application.

Applicants must also seek authorization under a Natural Streambed and Land Preservation Act (Section 310) permit from the local Conservation District for recreational suction dredging.  Applying for a 310 permit is required and has no cost.  Therefore, DEQ recommends obtaining 310 permit authorization prior to applying for authorization under the fee-required General Permit for Portable Suction Dredging.