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
WDFW North Puget Sound Region Office
16018 Mill Creek Boulevard
Mill Creek, Washington 98012-1296