*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 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. 



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 1 st to 

 May 3 1st 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 Boundar>' throughout the succeeding 1 2 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 1 st to 

 May 3 1 st 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. 



A3-2 



