For more information on the Hydraulic Permit Application (HPA) Program, please contact:
WDFW Habitat Program
(360) 902-2534


Hydraulic Project Approval (HPA)

Online HPA Application

Emergency HPA Information

Contact a WDFW biologist

Hydraulic Project Approval (HPA)

Welcome to the Hydraulic Project Approval (HPA) website for Washington State.

Since 1943, anyone planning certain construction projects or activities in or near state waters has been required to obtain an environmental permit commonly known as an HPA. Thousands of HPAs are issued each year for activities including work on bulkheads, piers, docks, culverts, bridges, and sediment dredging projects.

The Washington Department of Fish and Wildlife (WDFW) administers the HPA program under the state Hydraulic Code, which was specifically designed to protect fish life. WDFW Habitat Biologists are available to assist with the application process and ensure projects meet state conservation standards for fish and their aquatic habitat.

The Department uses an online Aquatic Protection Permitting System (APPS) to manage permit applications. APPS allows applicants to:

  • Submit an application and any required or supporting documents.
  • Convert the submitted APPS application into a Joint Aquatic Resource Permit Application (JARPA) with one click.
  • Check the status of an application.

APPS also allows the public to search for and receive updates about HPA applications.

Use the tabs above to learn more about the application process and WDFW's APPS online application system.


Cover of HPA brochure
Download the
HPA brochure

New update summarizes public comments on HPA program

In the fall of 2015, the Washington Department of Fish and Wildlife asked citizens to comment on recent changes in the HPA program as part of its "Washington Wild Future" public outreach initiative. Comments received from 157 people attending public meetings and 21 received via email are summarized in a recent HPA Program update.

Interactive Map of HPA Issued Permits