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CALCULATIONS of FLOW AUGMENTATION 

 EQUIVALENT to JOHN DAY at MOP 



Method 



John Day Normal Pool to MOP 

 Flow Augmentation required in Lower Columbia only 

 (Source: NPPC) 



John Day MIP to MOP 



Flow Augmentation required in Lower Columbia only 

 (Source: NPPC) 



John Day MIP to MOP 



Flow Augmentation required in Middle Columbia, in 



Lower Snake, and in Lower Columbia 



(Source: Corps) 1 ,529,000 50 



John Day MIP to MOP 



Flow Augmentation required in Lower Snake and in 



Lower Columbia 



(Source: Corps) 844,000 91 



Corps - U.S. Army Corps of Engineers 



NPPC - Northwest Power Planning Council staff 



STORAGE behind U.S. DAMS 



in the UPPER COLUMBIA 



Dam (State) Storage 



(acre-feet) 



Grand Coulee (WA) 5,190,000 



Libby (MT) 4,980,000 



Hungry Horse (MT) 3,160,000 



Source: U.S. Army Corps of Engineers 



