♦RECOMMENDED FLOW APPORTIONMENT 

 IN THE POPLAR RIVER 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: 



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

 crossing the International Boimdary 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. 



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 

 Boimdary, 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 foot 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 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 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 

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



A3-2 



