(iii) 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 9,250 cubic decameters 

 (7,500 acre-feet), but does not exceed 14,800 cubic 

 decameters (12,000 acre-feet), then a continuous minimum 

 flow of 0.085 cubic metres per second (3.0 cubic feet 

 per second) shall be delivered to the United States on 

 the East Poplar River at the International Boundary 

 during the succeeding period June 1st through August 

 31st. A minimum delivery of 0.057 cubic metres per 

 second (2.0 cubic feet per second) shall then be main- 

 tained from September 1st through to May 31st of the 

 following year. In addition, a volume of 617 cubic 

 decameters (500 acre-feet) shall be delivered to the 

 United States upon demand at any time during the 12 

 month period commencing June 1st. 



(iv) When the total natural flow of the Middle Fork Poplar, 

 as determined below the confluence of Goose Creek, 

 during the immediately preceding March 1st to May 31st 

 period exceeds 14,800 cubic decameters (12,000 acres- 

 feet) then a continuous minimum flow of 0.085 cubic 

 metres per second (3.0 cubic feet per second) shall be 

 delivered to the United States on the East Poplar River 

 at the International Boundary during the succeeding 

 period June 1st through August 31st. A minimum delivery 

 of 0.057 cubic metres per second (2.0 cubic feet per 

 second) shall then be maintained from September 1st 

 through to May 31st of the following year. In addition, 

 a volume of 1,230 cubic decameters (1,000 acre-feet) 

 shall be delivered to the United States upon demand at 

 any time during the 12-month period commencing June 1st. 



(c) The natural flow at the International Boundary in each of the 

 remaining individual tributaries shall not be depleted by more 

 than 60 percent of its natural flow. 



The natural flow and division periods for apportionment purposes 

 shall be determined, unless otherwise specified, for periods of time 

 commensurate with the uses and requirements of both countries. 



A4 - 3 



