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<li><em>Annual totals by water year (Oct 1 &ndash; Sep 30).</em></li>
<li><em>Most recent water year data may be provisional.</em></li>
<li><em>Years with incomplete gauge data have been omitted.</em></li>
<li><em>Annual runoff totals are in units of 1000 Acre-Feet.</em></li>
</ul>
<p><em><strong>Graphs are interactive, hovering over data will show the runoff values.</strong></em></p>
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<h3 id="cwso-header">Colorado Water Supply Outlook</h3>
<p id="runoff-intro">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):</p>
<div class="content">
<table class="runoff-table" style="border-collapse: collapse; margin-left: auto; margin-right: auto;" cellspacing="0">
<thead>
<tr>
<th>Division</th>
<th>River</th>
<th>April - July Forecasted Runoff (1000 AF)</th>
<th>% of 30 yr avg</th>
</tr>
</thead>
<tbody>
<tr>
<td>1</td>
<td>South Platte River at South Platte*</td>
<td>200</td>
<td>88%</td>
</tr>
<tr>
<td>2</td>
<td>Arkansas River at Pueblo Reservoir Inflow*</td>
<td>350</td>
<td>77%</td>
</tr>
<tr>
<td>3</td>
<td>Rio Grande River near Del Norte*</td>
<td>320</td>
<td>62%</td>
</tr>
<tr>
<td>4</td>
<td>Gunnison River near Grand Junction</td>
<td>785</td>
<td>53%</td>
</tr>
<tr>
<td>5</td>
<td>Colorado River near Dotsero</td>
<td>1,400</td>
<td>100%</td>
</tr>
<tr>
<td>6</td>
<td>Yampa River near Maybell</td>
<td>920</td>
<td>98%</td>
</tr>
<tr>
<td>7</td>
<td>Animas River at Durango</td>
<td>255</td>
<td>62%</td>
</tr>
</tbody>
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<div class="content">&nbsp;</div>
<div class="content"><small>*Runoff forecasted for April - September 2020 period.</small></div>

Headwater Arkansas River Small

Historical Annual Runoff

Riverrunoffdiagram2020

River Through The Mountains

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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%

Posted On July 4, 2020 | Article By Janet Williams

Historical Annual Runoff

Colorado Water Supply Outlook