Navajo Reservoir

Navajo Dam

Current Status

Last Updated: January 12th, 2021

***Notices for the latest release changes are posted here. Email sbehery@usbr.gov or call 970-385-6560 for questions***

Navajo Reservoir On January 11th, the daily average release rate from Navajo Dam was 400 cfs while reservoir inflow was averaging approximately 140 cfs. The water surface elevation was 6036.38 feet above sea level. At this elevation the live storage is 1.074 maf (63 percent of live storage capacity) and the active storage is 0.412 maf (40 percent of active storage capacity). NIIP is not diverting.  The San Juan-Chama project is not currently diverting from the basin above the reservoir.  The river flow measured at the Animas River at Farmington USGS gage was at 170 cfs. River flow at the San Juan River at Four Corners USGS gage was 525 cfs.


Releases from Navajo Dam are made for authorized purposes of the Navajo Unit and are pursuant to the Record of Decision for the Navajo Reservoir Operations. Releases target the San Juan River Recovery Implementation Program's recommended downstream baseflow range of 500 cfs to 1,000 cfs through the critical habitat reach of the San Juan River (Farmington, NM to Lake Powell).  Current modeling shows the release will most likely vary between 250 and 500 cfs to accomplish this for the remainder of fall and early winter. The current weekly calculated baseflow average is 506 cfs, which is within the SJRIP’s recommended range.


Navajo was at 6036.9 ft of pool elevation and 1,079,469 acre-ft of storage by the end of December, which was 82% of average for the end of the month. The release averaged 360 cfs and totaled 21,860 af, which was 51% of average for the month.  Preliminary modified unregulated inflow (MUI) into Navajo was 10,171 af.  Calculated evaporation for the month was 528 af.   Navajo had a net storage loss of 14,973 af in December.

The most probable inflow forecast (adjusted to include observed flows and the short term forecast) for January, February, and March is 8,910 af (41% of average), 14,000 af (46% of average), and 37,000 af (40% of average), respectively. 

The April-July runoff forecasts are as follows:
Min Probable: 275,000 af (37% of average)
Most Probable: 450,000 af (61% of average)
Max Probable: 740,000 af (100% of average)

Reclamation conducts Public Operations Meetings three times per year to gather input for determining upcoming operations for Navajo Reservoir. Input from individuals, organizations, and agencies along with other factors such as weather, water rights, endangered species requirements, flood control, hydro power, recreation, fish and wildlife management, and reservoir levels, will be considered in the development of these reservoir operation plans. In addition, the meetings are used to coordinate activities and exchange information among agencies, water users, and other interested parties concerning the San Juan River and Navajo Reservoir. The next meeting will be held virtually on Tuesday, January 19th at 1:00 PM. For a link to the meeting please email westcoloareaoffice@usbr.gov.

Susan Behery
sbehery@usbr.gov

Contact

Please contact the Operations Group via e-mail at ResourceMgr@usbr.gov for additional information.

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Last Updated: 1/15/21