From email from Reclamation (Brittany Jones):
The Bureau of Reclamation will increase diversion of Colorado River water to Horsetooth Reservoir at midnight tonight. The change will require a decrease in the Big Thompson River diverted for power generation at Olympus Dam.
Reclamation is currently releasing 125 cfs to the Big Thompson River from Olympus Dam. The flow will increase to 265 cfs beginning tonight. Our current forecast indicates that runoff into Lake Estes will substantially increase over the next week. It is possible the Olympus Dam required release to the Big Thompson River will exceed 600 cfs.