A map of Alaska with the Yukon River Watershed outlined in black. Inside the watershed boundary, light blue lines show the network of Yukon River salmon streams. Red circles with thin yellow outlines mark the locations of culvert survey sites. A legend, north arrow, and a scale bar marked in 250 mile increments appear along the bottom of the map.
Photo By/Credit

Timothy Ericson/USFWS

Date Shot/Created
08/01/2025
Media Usage Rights/License
Public Domain
Image
A map of Alaska illustrating the network of Yukon River salmon streams and the Yukon River Drainage Fisheries Association (YRDFA) culvert survey sites within the Yukon River Watershed. The map was created in August 2025.
Subject tags
Culverts
Fish migration
Surveying