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What is the purpose of a hydraulics project approval permit?

The purpose of a hydraulics project approval permit, issued by Washington State Department of Fish and Wildlife (WDFW), is to see that construction activities that affect the bed or flow of state waters is done in a manner that prevents damage to the state's fish and shellfish and their habitat.

What activities require this permit?

A Hydraulic Project Approval is required when any construction activity in or near state waters is proposed. State waters include all marine waters and fresh waters of the state.

For application forms or other information

  • Go to Hydraulic Project Approval (HPA) on WDFW's Web site

  • Contact:

    WDFW North Puget Sound Region Office
    16018 Mill Creek Boulevard
    Mill Creek, Washington 98012-1296
    Telephone: 425-775-1311
    Fax: 425-338-1066.

Legal authority

Chapter 77.55 of the Revised Code of Washington

Administered by

Washington State Department of Fish and Wildlife

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