Skip to main content
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.
Monitoring location Gila Gravity Main Canal at Imperial Dam, Az-ca - USGS-09522500
Urgent for you to know:
- Due to a lapse in government funding, this website will not be updated except to provide important public safety information. For more information please visit: www.doi.gov/shutdown.