Scientists will use drone to collect fishway structure data in Clark, Cowlitz, Klickitat, and Skamania counties


This document is provided for archival purposes only. Archived documents do not reflect current WDFW regulations or policy and may contain factual inaccuracies.

News release Oct 11, 2021

Danny Didricksen, 509-571-5559
Sam Montgomery, 360-688-0721

RIDGEFIELD – Starting Oct. 27, scientists with the Washington Department of Fish and Wildlife (WDFW) will use a drone to collect data on fishway structures in Clark, Cowlitz, Klickitat, and Skamania counties. Drone flights will take place exclusively on public land for up to three days between October and December.

These drone flights will help WDFW biologists assess fishway structures in remote areas and help determine if the structures need any repairs.

"This aerial survey will gather important data about structures that may need repaired for better fish passage,” said Danny Didricksen, WDFW fish screening section manager. “This data will help us improve fish habitat across a variety of WDFW-managed lands.”

Drone flights will take place occasionally on weekdays between 10 a.m. and 5 p.m. in compliance with all federal and state regulations.

The Washington Department of Fish and Wildlife works to preserve, protect and perpetuate fish, wildlife and ecosystems while providing sustainable fish and wildlife recreational and commercial opportunities. 

Individuals who need to receive this information in an alternative format, language, or who need reasonable accommodations to participate in WDFW-sponsored public meetings or other activities may contact the Title VI/ADA Compliance Coordinator by phone at 360-902-2349, TTY (711), or email ( For more information, see