Hydraulic Project Approval (HPA)

Washington State law (RCW 77.55) requires people planning hydraulic projects in or near state waters to get a Hydraulic Project Approval (HPA) from the Washington Department of Fish and Wildlife (WDFW). This includes most marine and fresh waters. An HPA ensures that construction is done in a manner that protects fish and their aquatic habitats.

The Office of Regulatory Innovation and Assistance (ORIA) has in-depth information about most environmental permits in their Regulatory Handbook. WDFW permit processing and issuing times can be found in the handbook and are also available in ORIA's Permit Timeliness Data repository.

  • About HPAs

    Learn what kind of projects require an HPA and who to call for an emergency HPA.

  • Types of HPAs

    WDFW can help you determine what kind of HPA best meets your needs.

  • Apply for an HPA

    You can apply for an HPA online through the Aquatic Protection Permitting System.

  • HPA application process

    Submitting the correct information from the start can help accelerate the HPA process.

  • Resources for fish-friendly hydraulic projects

    WDFW offers technical assistance to help ensure your project protects fish.

  • HPA Compliance

    WDFW works with permittees to ensure construction activities protect fish and their habitats.

  • Hydraulic Code rule making 220-660 WAC

    Learn about the ongoing rulemaking process to modify regulations for activities in or near water.

  • Report a violation

    Report what you suspect is unauthorized in water work, illegal blocking of streams and rivers, or improper construction and other work in or near water that may be harming fish life.

  • SEPA requirements

    A complete HPA application must include proof that your project complies with SEPA.