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.
Hydrologic technician Kelly McVicker examines water-quality readings along the Conowingo Dam as Shane Mizelle lowers the sensor into the waters below.
Spring 2024 Photo Contest Winner: David Fisher, People category
Public Domain.
