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Navajo Reservoir Operations CRFS Technical Committee November 8 , 2011 Fall Technical Meeting

Navajo Reservoir Operations CRFS Technical Committee November 8 , 2011 Fall Technical Meeting. Review of Water Year 2011 Operations. AVAILABLE WATER (April) PATH Min Prob : 376,960 af #2 Most Prob : 500,429 af #2

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Navajo Reservoir Operations CRFS Technical Committee November 8 , 2011 Fall Technical Meeting

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  1. Navajo Reservoir Operations CRFS Technical Committee November 8, 2011 Fall Technical Meeting

  2. Review of Water Year 2011 Operations

  3. AVAILABLE WATER (April) PATH Min Prob: 376,960 af #2 Most Prob: 500,429 af #2 Max Prob: 643,061 af #2

  4. Chasing the Target Baseflow • Temporary increases to 650 cfs were required in mid April and early May due to late runoff and dry conditions • Base releases remained at 500 cfs until August 9th • Late runoff kept the river within Target Base Flow range without additional releases later than usual • Increased release to 800 cfs on August 9th, up to 900 cfs on August 17th • Returned to 500 cfs base release on October 6th. • Reduced release to 350 cfs for trout habitat improvements (should be complete by December)

  5. Elevation = 6058.4 (97% of Average) Storage = 1,327,727 af (78% Full) Inflow = 485cfs Release = 350cfs NIIP = 6 cfs (Not Diverting) San Juan-Chama Diversion = 16 cfs Navajo Current Conditions(as of 11/7/2011)

  6. Western Colorado Area Office Contact:Ryan Christianson970-385-6590, rchristianson@usbr.gov

  7. Forecasting Challenges • Over forecasting in the winter/early spring • Animas @ Farmington forecast point

  8. Actual Inflow – 576,275 af (78% of Average)

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