♦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 



I more than 60 percent of its natural flow. 



t 



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

 I 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 



I 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 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 Report, 



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



A3-3 



