Historical Annual Runoff


Click here to download a PDF of the Historical Annual Colorado River Runoff diagram

  • Annual totals by water year (Oct 1 – Sep 30).
  • Most recent water year data may be provisional.
  • Years with incomplete gauge data have been omitted.
  • Annual runoff totals are in units of 1000 Acre-Feet.

Graphs are interactive, hovering over data will show the runoff values.

Colorado Water Supply Outlook

The Natural Resource Conservation Service water supply outlook, as of May 1, 2020, contains the following estimates of runoff for the April through July 2020 period at the following gauges (Note: Not all gauges shown for historical runoff are forecasted, in which case a representative gauge from the outlook report was chosen):

Division River April - July Forecasted Runoff (1000 AF) % of 30 yr avg
1 South Platte River at South Platte* 200 88%
2 Arkansas River at Pueblo Reservoir Inflow* 350 77%
3 Rio Grande River near Del Norte* 320 62%
4 Gunnison River near Grand Junction 785 53%
5 Colorado River near Dotsero 1,400 100%
6 Yampa River near Maybell 920 98%
7 Animas River at Durango 255 62%
*Runoff forecasted for April - September 2020 period.

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COLORADO HISTORICAL ANNUAL RUNOFF CLICK HERE TO VIEW