From email from the Colorado Division of Water Resources (Erin Light via Scott Hummer):
Right in step with the unprecedented year of 2020, the Yampa River is going on call for the second time in three years. And once again, the structures located at the bottom of the system do not have enough natural flow to meet their diversion demands.
We, the Division of Water Resources, are currently protecting reservoir water released from Elkhead Creek Reservoir for the protection of the endangered fish species. The amount of reservoir water currently being released for the Endangered Fish Recovery Program is 75 cfs. This in turn requires that there is 61 cfs at the Yampa River at Deerlodge Park gage station. The flow this morning is hovering around 50 cfs which means reservoir water is being diverted by water users upstream.
The entire Yampa River system is under administration for several reasons, the most obvious of which is that if the reservoir water was not in the system the structures at the bottom of the system would have no water and we would be instituting what one might consider a standard or more typical call that would encompass the entire Yampa River and its tributaries. Additionally, the water users on the mainstem of the Yampa River between Elkhead Creek and its confluence with the Green River should not have to bear the brunt of the entire Yampa River being short of water simply because their structure is located within the Critical Habitat Reach (the protected reach for the Endangered Fish).
Actions have already been put in place to institute the call and as of 12:00 PM today, the Yampa River and all of its tributaries are considered under administration. The Calling Priority right (or most junior water right that may divert at this time) is located at the Craig Station Power Plant with an administration number of 37149.00000 (this water right has an adjudication date 9/1/1960 and an appropriation date of 9/17/1951). This Calling Priority may change as the call progresses. In order to follow the call you may visit the following website:
If you have a water right junior to the above listed priority and you are diverting water, please cease your diversions unless your diversion can operate under a decreed augmentation plan or substitute water supply plan approved by the State Engineer. Also, if you are the owner of a pond, you are required to bypass all out of priority inflows.
If you have any questions or concerns please feel free to contact me or your water commissioner.
Erin Light, P.E.
Division Engineer, Water Division 6