From the Sky-Hi Daily News:
The channel had been closed since early October for a rehabilitation project to increase the safety and efficiency of the 65-year-old structure. Because most of the project work is completed, normal water operations have resumed. Workers will continue paving and re-vegetation work through mid-November. The channel is part of the Colorado-Big Thompson Project, which is owned by the U.S. Bureau of Reclamation and operated by Northern Water, a public agency created in 1937 to contract with the U.S. Bureau of Reclamation to build the Colorado-Big Thompson Project, which collects water on the West Slope and delivers it to the East Slope through a 13- mile tunnel that runs underneath Rocky Mountain National Park.
More Colorado-Big Thompson Project coverage here