Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
U.S. Geological Survey Hydrologic Technician, Ian Lynch, deconstructs a water quality deployment, removing it for the winter, at USGS gage 03012545 Allegheny River below Kinzua Dam at Big Bend, PA.
Winter 2026 Photo Contest Winner: Lindsey Sabo, Honorable Mention
Public Domain.
