Bureau of Reclamation Banner, Upper Colorado Region
Fontenelle Dam

 

 

 

 

 

FONTENELLE

Inflows to Fontenelle Reservoir for the month of June were 332,000 acre-feet (AF), or 111 percent of average. The current reservoir elevation is 6498.5 feet, which amounts to 83 percent of live storage capacity. The current inflow rate is 1,950 cubic feet per second (cfs), with recent daily averages ranging from 2,080 cfs to 2,400 cfs.

Fontenelle releases were held steady between 1,750 cfs and 1,850 cfs in April and May. Releases were increased at the beginning of June and reached 7,000 cfs on Tuesday, June 9th. Due to warm temperatures and persistent storm activity, runoff inflows peaked during the second week of June near a daily average of 7,500 cfs.

Spring runoff has peaked and reservoir inflows continue to decline. While weather conditions are expected to be relatively cool and wet this week, the forecasted inflow volume for July has decreased significantly, as indicated by the Colorado Basin River Forecast Center.  Fontenelle will be operated to accommodate the anticipated hydrologic conditions.

Beginning Monday, July 6th, 2015, at 8:00 a.m., releases from Fontenelle will be decreased to 1,200 cfs according to the following schedule:

Date

Time
MST

Initial Release
(cfs)

 

 

Change
(cfs)

 

Final Release
(cfs)

7/6/2015

0800

2900

 

 

-200

 

2700

7/6/2015

1600

2700

 

 

-200

 

2500

7/7/2015

0800

2500

 

 

-200

 

2300

7/7/2015

1600

2300

 

 

-200

 

2100

7/8/2015

0800

2100

 

 

-200

 

1900

7/8/2015

1600

1900

 

 

-200

 

PP (~1,700 cfs)

7/9/2015

0800

PP (~1700)

 

 

-150

 

1550

7/9/2015

1600

1550

 

 

-150

 

1400

7/10/2015

0800

1400

 

 

-100

 

1300

7/10/2015

1600

1300

 

 

-100

 

1200

After the final change at 4:00 p.m. on Friday, July 10th, 2015, releases will remain at 1,200 cfs until further notice. It is currently anticipated that reservoir releases will be maintained at 1,200 cfs until mid-August, when releases will be reduced to a winter baseflow level of 1,000 cfs. This is subject to change based on observed hydrology.  

The official July forecast of April-July inflow is for 730,000 AF (101% of average). While seasonal reservoir inflows from April through July are projected to be near average, forecasted inflow volume for July is expected to be well below average at 88,000 AF (49% of average).

To view the most current reservoir elevation, content, inflow and release, click on: Fontenelle Reservoir Data.

WORKING GROUP

The next Fontenelle Working Group meeting is scheduled for August 26, 2015, at 10:00 am at the Joint Powers Water Board in Green River, Wyoming. The Fontenelle Working Group is an open public forum for information exchange between Reclamation and other parties associated with the operation of Fontenelle Reservoir.

The spring Fontenelle Working Group meeting was held on April 15, 2015 at Seedskadee Wildlife Refuge in Green River, Wyoming. Minutes from the meeting are currently being drafted and will be posted on the Working Group webpages

Updated July 6, 2015
Lee Traynham

Email comments/inquires to: ResourceMgr@usbr.gov