Skip Navigation

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.  

March 19, 2015



Fontenelle Reservoir releases are currently 1,250 cfs. The current rate of inflow is approximately 1,290 cfs and increasing due to several consecutive days of warm weather. Current and projected hydrology are for continued warm and dry conditions resulting in an earlier spring peak followed by lower than average base flows.  Fontenelle will be operated to accommodate the current shifted hydrologic conditions.

Beginning Monday, March 30, 2015, at 8:00 a.m., releases from Fontenelle will be increased to powerplant capacity (~1,700 cfs) over the course of three days according to the following schedule:

Date             Time    Initial Release          Change               Final Release

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

03/30/2015      0800      1250                      +100                 1350

03/30/2015      1600      1350                      +100                 1450

03/31/2015      0800      1450                      +100                 1550

03/31/2015      1600      1550                      +100                 1650 

04/01/2015      0800      1650                      +50                 P-Plant Capacity (~1,700) 


After the final change at 8:00 a.m. on Wednesday, April 1, 2015, releases will remain at power plant capacity (~1,700 cfs) until further notice. All times identified are local time (Mountain Prevailing Time) and not hour ending.

Releases will likely increase again sometime toward the beginning of May in anticipation of increased inflows.  The release rate will be determined once the forecast has been received.

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: Mar 24, 2015
Return to main navigation