BUREAU OF RECLAMATION
ASPINALL UNIT SPRING OPERATIONS
June 2, 2017
The peak release period of the spring peak operation has concluded. Flows at the Whitewater gage were over 14,000 cfs for four days and a peak daily flow of 15,400 cfs was achieved on May 26.
Releases are now being made to sustain half bankfull flow levels at the Whitewater gage. Releases from the Aspinall Unit have been decreasing over the past week and now flows in the Gunnison River through the Black Canyon are around 6,000 cfs. Another decrease is planned for this afternoon and that should result in flows in the lower Gunnison River at the Whitewater gage dropping down towards 8,500 cfs over the weekend.
It is expected that flows in the Gunnison River through the Black Canyon will remain near 5,500 cfs during the half bankfull flow period. River flow levels will be assessed again next week and further adjustments may be necessary to set a release level that will achieve the half bankfull target of 8,070 cfs in the lower Gunnison River at the Whitewater gage.