Flows to start dropping

This just arrived from Reclamation: Yellowtail Stakeholders and Interested Parties: This message is to provide you with notification of Reclamations plans to continue reducing releases from Yellowtail Dam to the Bighorn River. All storage in the exclusive flood control zone is expected to be successfully evacuated by late Thursday, October 27. In order to maintain the reservoir at the operating criteria elevation target, and to prepare for setting the fall/winter river release, Reclamation plans to make the following changes:Thursday, October 27 at 4:00 PM: Releases from the Yellowtail Afterbay will be reduced from 4,340 cfs (river stage 61.74) to 3,850 cfs (river stage 61.44).Monday, October 31 at 4:00 PM: Releases from the Yellowtail Afterbay will be reduced from 3,850 cfs (river stage 61.44) to 3,350 cfs (river stage 61.12).Please let me know if you have any questions about our operations at Yellowtail Dam.Thanks, Tim Felchle (sent on behalf of): Steve DaviesU.S. Bureau of ReclamationMontana Area OfficeOffice: 406-247-7322Cell: 406-855-1446sdavies@usbr.gov

Flows to decrease from 4,840cfs to 4,340cfs

This Reclamation update came this afternoon while I was floating the river with two other good Friends of the Bighorn River: Yellowtail Stakeholders and Interested Parties: This message is to provide you with notification of Reclamations plans to reduce releases from Yellowtail Dam to the Bighorn River. Based on streamflow measurements conducted by the U. S. Geological Survey earlier today, actual releases from the Yellowtail Afterbay to the Bighorn River are higher than planned (4,840 cfs compared to 4,000 cfs). This disparity is likely attributed to the seasonal reduction in aquatic vegetation in the river. In order to control the rate of reservoir storage evacuation, Reclamation will be making the following changes:Monday, October 24 at 4:00 PM: Releases from the Yellowtail Afterbay will be reduced from 4,840 cfs (river stage 62.03) to 4,340 cfs (river stage 61.74).Additional adjustments later this week may be necessary to ensure we meet our end-of-month reservoir elevation target.Please let me know if you have any questions about our operations at Yellowtail Dam.Thanks, Dan Jewell, sent on behalf of: Steve DaviesU.S. Bureau of ReclamationMontana Area OfficeOffice: 406-247-7322Cell: 406-855-1446sdavies@usbr.gov

Flows to increase to 4,000cfs

This arrived a short time ago from Reclamation: Due to the recent precipitation received during October 6-7, inflows into Bighorn Lake have increased. To continue evacuating flood storage in Bighorn Lake, the following operation change is required at Yellowtail Dam and Powerplant. At 4pm today, river release were increased from 3,750cfs to 4,000cfs

Flows to increase to 3,750cfs

Word just came from Reclamation that due to the recent precipitation received during October 6-7, inflows into Bighorn Lake increased to nearly 12,000cfs. Storage has entered the exclusive flood pool and continues to slowly increase. To slow the rate of fill and evacuate flood storage in Bighorn Lake, the following operation change is required: At 4pm on Tuesday, October 11, river releases will be increased from 3,250cfs to 3,750cfs.

Flows to drop to 3,250cfs

Yellowtail Stakeholders and Interested Parties: This message is to provide you with notification of Reclamations plans to reduce our releases from Yellowtail Dam to the Bighorn River. Yellowtail Reservoir is currently at about elevation 3640.1 feet, and is expected to reach elevation 3640.0 feet and be out of the exclusive flood control pool in the coming days. In order to control the rate of evacuation of the reservoir, we are planning to make the following reduction in our releases:Wednesday, October 5 at 4:00 PM: Releases from Yellowtail Dam will be reduced from about 3,500 cfs to about 3,250 cfs.Additional information regarding the current operational conditions at Yellowtail Dam and Reservoir can be obtained at http://www.usbr.gov/gp/lakes_reservoirs/montana_lakes.htm. Please let me know if you have any questions about our current operations at Yellowtail Dam. Thanks again, Steve DaviesU.S. Bureau of ReclamationMontana Area OfficeOffice: 406-247-7307Cell: 406-855-1446sdavies@usbr.gov