* 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: 



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 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 



* 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. 



A4- 2 



