Big T (Colo) up, but not a lot
Those of you on or visiting the Big Thompson River likely noticed an increase in flows this morning. Last night, we bumped releases from Olympus Dam to the lower Big T up to about 120 cfs.
We are currently seeing a little bit of run-off come down into Lake Estes. It's not much; probably around 70 cfs. As we normally do, we are passing that 70 cfs on through Olympus Dam.
In addition, we also have a section of the Charles Hansen Feeder Canal (from Flatiron Reservoir north to the Big Thompson Canyon mouth) down for some annual maintenance. That means, the 50 cfs of Colorado-Big Thompson Project water we were sending to Horsetooth via the canal is now being rerouted down the Big Thompson River. We pick it up at the Dille Diversion Dam near the canyon mouth and, from there, send it on its way to Horsetooth via the rest of the canal not under maintenance.
The rerouted 50 cfs of project water plus the native inflow we're seeing at Lake Estes equals the 120 cfs currently in the lower Big Thompson River.
We anticipate the 120 cfs rate will continue down the Big T for the remainder of the maintenance work on the canal--a couple of weeks. What might change the release is a change in the native run-off flow we're seeing into Estes.
We will see what the weather brings.
As always, please let me know if you have any additional questions.
Eastern Colorado Office
Bureau of Reclamation