Yampa River flows on the rise due to reservoir releases above Steamboat
July 17, 2018
STEAMBOAT SPRINGS — Flows in the Yampa River have seen a boost after officials began releasing reservoir water to increase the amount of water flowing in the upper Yampa.
The Colorado Water Trust will release a total of 600 acre-feet of water from Stagecoach Reservoir, initially at a rate of 15 cubic feet per second. The releases began on Saturday, said Zach Smith, an attorney for the organization.
"We've worked with them to deliver water to and through Steamboat Springs to improve both the fishery and the recreational opportunities that folks there have," Smith said.
For the most part, the river has hovered between 80 and 90 cfs since July 7. Since the releases, about 90 to 100 cfs of water have been flowing under the Fifth Street Bridge in downtown Steamboat.
Even with the boost, the river is flowing well below its average for the date. It was flowing at 90 cfs at 11 a.m. Tuesday, about 32 percent of its long-term average flow of 273 cfs for July 17.
"With low flows and high stream temperatures triggering early river closures this summer, our community has an acute awareness of how drought and over-use can impact the health of the Yampa River," City Water Resources Manager Kelly Romero-Heaney wrote in an email.
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The combined closures issued by the city and Colorado Parks and Wildlife essentially restrict recreation on the river from Stagecoach Dam through the city of Steamboat Springs.
Though the river is up, it's unlikely the city would lift voluntary recreational closures on the river through Steamboat.
"At this point, it is not likely that the increased flows from the release are enough to lift the river closure with the current weather patterns that we are seeing," Craig Robinson, interim director of the city’s Parks and Recreation Department, wrote in an email.
The river is still heating up with water temperatures above 75 degrees, he added. That high temperatures stress trout and other aquatic species that are adapted to live in the Yampa's cold-water ecosystem. The high water temperatures also decreases the amount of oxygen available to organisms in the river.
"The flows are very helpful for river health as conditions would likely be worse without this additional flow," Robinson wrote. "If the monsoon season started, and we had a pattern of daily moisture and cooler temps, these combined factors with the additional cfs from the release could reduce the stressors, and the closure could be lifted."
A mandatory fishing closure is still in place in the tailwaters of Stagecoach Reservoir. The river is closed between the dam and the lowermost park boundary. Anglers who violate the Colorado Parks and Wildlife closure order could receive citations.
The agency also has instituted a voluntary closure of the river from Chuck Lewis State Wildlife Area to the western edge of Steamboat. Area Wildlife Manager Kris Middledorf said wildlife managers and biologists continue to discuss river conditions and evaluate the agency's closures.
Once snowpack melts, increases in the Yampa's flow come from the area's sparse rainfall, reservoir releases and groundwater that returns to the river after it's used to irrigate agriculture.
Since 2012, reservoir releases have boosted flows in the Yampa in every year except 2014, Smith said. Last year, the Yampa saw the last release allowed under an approval issued by the Colorado Water Conservation Board, which allowed for three years of releases to benefit in-stream flows over the course of 10 years.
Current releases operate outside of the Water Conservation Board program and are designated to benefit municipal users.
"The fish don't care by which legal mechanism that water is in there, as long as the flow is up," Smith said.
The Water Trust purchased the water using funding from the Nature Conservancy, Tri-State Generation and Oskar Blues Brewery's CAN'd Aid Foundation.
Should flows in the river remain low once the Colorado Water Trust's initial 600 acre-feet of water is sent downstream, the trust could use other funding sources to purchase more water, Smith said. In the past, the city has cooperated to release city-owned water from the reservoir after the Colorado Water Trust has released its allocation of water, he added.
"We know that the community up there loves this river, and they love it enough to know when to get out of it when it's stressed," Smith said. "If we can improve it with additional flow for the community up there, that's what the Water Trust is around for.”