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.
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.
Technical assistance program
WDFW offers technical assistance to help ensure your project protects fish.
SEPA requirements
A complete HPA application must include proof that your project complies with SEPA.
Hydraulic Code rule making 220-660 WAC
Learn about the ongoing rule-making process to modify HPA regulating suction dredging activities