The Upper Snake River system is:
Total storage content:
Total storage capacity:
The change in system content is:

Upper Snake River Operations Updates

For official flood watches and warnings please visit the National Weather Service

Hydromet — Reservoir and Streamflow Data

Select Upper Snake River Basin:

AgriMet — Agricultural Weather Data

Useful Links
River Flow Data from the USGS


Upper Snake River Basin:

  • Call (208) 678-0461 ext: 25 for recorded streamflow information.
  • Email Brian Stevens at

American Falls Dam Grassy Lake Dam Island Park Dam Jackson Lake Dam Ririe Dam Palisades Dam Minidoka Dam Little Wood Dam Milner Dam Henrys Lake Dam Click on the Reservoir name to view reservoir and streamflow data.

Check boat ramp elevations>>

Last Updated: 9/29/21