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, 2019, contains the following estimates of runoff for the April through July 2019 period at the following gauges (Note: Not all gauges shown to the left 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* 235 105%
2 Arkansas River at Pueblo Reservoir Inflow* 550 121%
3 Rio Grande River near Del Norte* 755 147%
4 Gunnison River near Grand Junction 2,120 143%
5 Colorado River near Dotsero 1,790 128%
6 Yampa River near Maybell 1,020 109%
7 Animas River at Durango 580 140%
*Runoff forecasted for April - September 2019 period.

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COLORADO HISTORICAL ANNUAL RUNOFF CLICK HERE TO VIEW