Releases from Stagecoach to #YampaRiver become more important as climate warms #Colorado: Water Trust has released more than 600 million gallons into the waterway since 2012 — Steamboat Pilot & Today #GreenRiver #ColoradoRiver #COriver #aridification

Stagecoarch Reservoir outflow June 23, 2019. Photo credit: Scott Hummer

Click the link to read the article on the Steamboat Pilot & Today website (Dylan Anderson). Here’s an excerpt:

Near the end of July, flows into Stagecoach Reservoir from the Yampa River dropped below 40 cubic feet per second for a few days. That threshold is important because it helps, in part, determine how much water flows out of the reservoir and continues downstream to Steamboat Springs. If the flow coming in is more than 40 cfs, then at least 40 cfs is usually discharged at the bottom of Stagecoach Dam. If the inflow drops below 40 cfs, the outflow generally would as well, leaving less water for critical fish habitat below the dam and in the river in general.

But on July 21, the Upper Yampa Water Conservancy District released reservoir water to bolster the river’s outflow — part of a 10-year deal for water releases with the nonprofit Colorado Water Trust meant to protect the health of the river…

The long-term deal is one of the first in the state and was made possible by a 2020 state law allowing such agreements. Before, groups like the Water Trust and Upper Yampa district needed to rehash out a contract each year…

But this year has been different. While the snowpack wasn’t impressive, spring precipitation slowed melting, and there was still snow in the basin until June 23, according to the Natural Resources Conservation service. Monsoon rains have further buoyed the river, with Steamboat measuring more than 10 inches of rain from May to July. While not necessarily a good roll, this year doesn’t seem like a bad one.

“I think it is on the low side of average,” said Emily Lowell, the district engineer for the Upper Yampa Water Conservancy District. “Runoff was pretty average, and I think monsoonal rains this summer have made it sustain that average.”

But even in a close-to-average year, releases from the reservoir are still needed, though not to the same extent. Since the first releases at the end of July, inflows and outflows have both stayed above 40 cfs and more of the trust’s water hasn’t been needed.

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