From email from Reclamation (Dan Crabtree):
The Uncompahgre Valley Water Users Association (Water Users) continue to fill canals for the irrigation season and are in immediate need of additional water from the Gunnison River. The only operating powerplant at Blue Mesa Dam is operating at full capacity and the bypass tubes will not be operational until next week. Therefore the Water Users will divert another 100 cfs at the Gunnison Tunnel which will reduce flows in the river by a corresponding amount. The result will be a flow of about 1,300 cfs in the Black Canyon and Gunnison Gorge.
More Aspinall Unit coverage here.