LRE Water

Historical Annual Runoff

Colorado Water Supply Outlook
Click below to download the Historical Annual Colorado River Runoff diagram PDF
  • 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, 2023, contains the following estimates of runoff for the May through July 2023 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 May - July Forecasted Runoff (1000 AF) % of 30 yr avg
1 South Platte River at South Platte* 86 59%
2 Arkansas River at Pueblo Reservoir Inflow* 305 97%
3 Rio Grande River near Del Norte* 125 128%
4 Gunnison River near Grand Junction 1,890 170%
5 Colorado River near Dotsero 1,270 100%
6 Yampa River near Maybell 1,260 167%
7 Animas River at Durango 515 154%