The Washington State Hydraulic Code laws (Chapter 77.55 RCW) and rules (Chapter 220-660 WAC) require that people planning hydraulic projects in or near state waters obtain a Hydraulic Project Approval (HPA) permit from the Washington Department of Fish and Wildlife (WDFW) before conducting work. This includes most marine and fresh waters. An HPA ensures that construction is done in a manner that protects fish and their aquatic habitats.
For information regarding other environmental permits, the Office of Regulatory Innovation and Assistance (ORIA) has in-depth information on their website, including a Regulatory Handbook, Project Questionnaire, and Permit Timeliness Data repository.
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About HPAs
Learn what kind of projects require an HPA and who to call for an emergency HPA.
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Types of HPAs
WDFW can help you determine what kind of HPA best meets your needs.
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Apply for an HPA
You can apply for an HPA online through the Aquatic Protection Permitting System.
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HPA application process
Submitting the correct information from the start can help accelerate the HPA process.
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Resources for fish-friendly hydraulic projects
WDFW offers technical assistance to help ensure your project protects fish.
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HPA Compliance
WDFW works with permittees to ensure construction activities protect fish and their habitats.
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Hydraulic Code rule making 220-660 WAC
Learn about the ongoing rulemaking process to modify regulations for activities in or near water.
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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.
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SEPA requirements
A complete HPA application must include proof that your project complies with SEPA.