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 Table 3. Cookson Reservoir Storage Statistics for 1988 



Elevation Contents 



Date (1988) (m) (dam 3 ) 



January 1 751.822 34,700 



March 23 (maximum) 751.829 34,700 



December 31 750.491 26,400 



Full-Supply Level 753.000 43,400 



Apportionment 



In 1976 the International Souris-Red Rivers Engineering Board, through 

 its Poplar River Task Force, completed an investigation and made a 

 recommendation to the Governments of Canada and the United States re- 

 garding apportionment of waters of the Poplar River basin. Although 

 not officially adopted by the two countries, the Poplar River Bilat- 

 eral Monitoring Committee has adhered to the Apportionment Recom- 

 mendations in each of its annual reports. Annex 4 contains the 

 apportionment recommendation. 



Minimum Flows 



The recorded runoff volume of the Poplar River at the International 

 Boundary from March 1 to May 31, 1988 was 1,160 dam 3 . For the 

 purposes of interpreting the apportionment recommendations of the 

 IJC, the recorded flow is assumed to be the natural flow. Based on 

 these recommendations, this volume entitled the United States to a 

 minimum discharge of 0.028 cubic metre per second (m 3 /s) from June 1, 

 1988 to May 31, 1989, on the East Poplar at the International Bound- 

 ary. The minimum flow of 0.028 m 3 /s for the first 5 months of 1988 

 had previously been determined on the basis of March 1 to May 31, 

 1987 Poplar River flow volume. 



A hydrograph of flow in the East Poplar River at the International 

 Boundary and the minimum flow as recommended by the IJC are shown in 

 Figure 2. 



