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Fontenelle Dam Releases & Green River Flow Updates

1966 Telephone Island 2-512x219We will post upcoming flow changes as they become available, with the link to Fontenelle Dam daily release information.  Large boulders, rock sills and structures in the river bed pose a constant risk to boaters on this stretch of the Green.  High water has the potential to drastically alter instream characteristics, such as locations of gravel bars, riffles and holes.  Float times during high water can also be expected to decrease.  Low flows will reveal more obstacles for boats and longer float times.  Visitors should be aware of changing flows and the associated risks.  

June 25, 2015



Fontenelle Reservoir is at elevation 6503.4 ft (94% full) and declining. Releases will be reduced to 5,000 cfs by the end of the day. Additional information regarding the current status of Fontenelle Reservoir can be found on the Reclamation website.

Spring runoff has peaked and reservoir inflows continue to decline. The current rate of inflow is roughly 3,290 cubic feet per second (cfs), with recent daily averages ranging from 3,680 cfs to 7,090 cfs. Weather conditions are expected to be warm and dry for the next two weeks and Fontenelle will be operated to accommodate the current hydrologic conditions.

Beginning Monday, June 29th, 2015, at 8:00 a.m., releases from Fontenelle will be decreased to 2,900 cfs according to the following schedule:

Date             Time    Initial Release          Change               Final Release

                      (MST)     (cfs)                     (cfs)                 (cfs)

06/29/2015      0800      5000                      -350                 4650

06/29/2015      1600      4650                      -350                 4300

06/30/2015      0800      4300                      -350                 3950

06/30/2015      1600      3950                      -350                 3600  

07/01/2015      0800      3600                      -350                 3250   

07/01/2015      1600      3250                      -350                 2900   


After the final change at 4:00 p.m. on Wednesday, July 1st, 2015, releases will remain at 2,900 cfs until further notice.  All times identified in this notification are local time (Mountain Standard Time) and not hour ending. 

Your cooperation is greatly appreciated.


Thank you,

Lee Elizabeth Traynham, P.E.

Civil Engineer (Hydrology) 

Bureau of Reclamation


 Visit the Bureau of Reclamation's website to monitor daily Fontenelle releases at 

Last Updated: Jun 30, 2015
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