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

Long-Term Projected Reservoir Operations
Short-Term Projected Reservoir Operations
Note: The projected operations discussed in the above reports are subject to change without notice.

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

Recent Presentations

11/12/14 —Recent Power Point Presentations

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 (800) 658-5771 for recorded streamflow information.
  • Email Brian Stevens at

Check out the Regional Water Operations site>>

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: 2/16/18