•RECOMMENDED FLOW APPORTIONMENT 

 IN THE POPLAR RTVER BASIN 



The aggregate natural flow of all streams and tributaries in the Poplar River Basin crossing the 

 International Boundary shall be divided equally between Canada and the United States subject to 

 the following conditions: 



1 . The total natural flow of the West Fork Poplar River and all its tributaries crossing the 

 International Boundary shall be divided equally between Canada and the United States but 

 the flow at the International Boundary in each tributary shall not be depleted by more than 

 60 percent of its natural flow. 



2. The total natural flow of all remaining streams and tributaries in the Poplar River Basin 

 crossing the International Boundary shall be divided equally between Canada and the 

 United States. Specific conditions of this division are as follows: 



(a) Canada shall deliver to the United States a minimum of 60 percent of the natural 

 flow of the Middle Fork Poplar River at the International Boundary, as determined 

 below the confluence of Goose Creek and Middle Fork. 



(b) The delivery of water from Canada to the United States on the East Poplar River 

 shall be determined on or about the first day of June of each year as follows: 



(i) When the total natural flow of the Middle Fork Poplar River, as determined 

 below the confluence of Goose Creek, during the immediately preceding 

 March 1st to May 31st period does not exceed 4,690 cubic decameters 

 (3,800 acre-feet), then a continuous minimum flow of 0.028 cubic metres 

 per second (1.0 cubic feet per second) shall be delivered to the United 

 States on the East Poplar River at the International Boundary throughout the 

 succeeding 12 month period commencing June 1st. In addition, a volume 

 of 370 cubic decameters (300 acre-feet) shall be delivered to the United 

 States upon demand at any time during the 12 month period commencing 

 June 1st. 



(ii) When the total namral flow of the Middle Fork Poplar River, as determined 

 below the confluence of Goose Creek, during the immediately preceding 

 March 1st to May 31st period is greater than 4,690 cubic decameters (3,800 

 acre-feet), but does not exceed 9,250 cubic decameters (7,500 acre-feet). 



Canada-United States, 1976, Joint studies for flow apportionment. Poplar River Basin, Montana-Saskatchewan: Main Report, 

 International Souris-Red Rivers Board, Poplar River Task Force, 43 pp. 



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