From email from Reclamation (Kara Lamb):
Starting today [June 19], we’ll be doing a little work on one of the hydro-electric generating units at the Green Mountain Power Plant on Green Mountain Dam. As a result, releases from the dam to the Lower Blue began cutting back late last night/early this morning. By early afternoon today (June 19) we anticipate having releases down to around 750 cubic feet per second.
Releases are scaling back in 100 cfs increments. The first change was at 10 p.m. last night, then 1 a.m. this morning, and again this morning at 6 a.m. Early this afternoon, when the unit is removed from service for maintenance, we will drop the last 100 cfs. That last change will leave about 750 cfs going through the other generating unit and flowing down the Lower Blue.
Right now, we are estimating the work will complete by Wednesday. Once the unit is returned to service, we will start ramping releases up again. However, with new snow in the mountains lately, we are not yet sure how high the releases will go later this week. I will update you once we have a better idea.
As for the reservoir, it is currently at a water level elevation of 7930 feet. That’s about 20 feet down from full. The reservoir has been filling pretty steadily for the last two weeks. It has gone up half a foot since midnight.
More Colorado-Big Thompson coverage here.