Figure 3.2 Flow Hydrograph of the East Poplar River at International Boundary. 



3.2.4 On-Demand Release 



In addition to the minimum flow, the IJC apportionment recommendation entitles Montana to an on- 

 demand release to be delivered on the East Poplar River during the twelve-month period commencing 

 June 1. Based on the runoff volume of 4,790 dam^ (3,880 acre-feet) recorded at the Poplar River at 

 International Boundary gauging station during the March I to May 31, 2001 period, Montana was 

 entitled to an additional release of 617 dam (500 acre-feet) from Cookson Reservoir during the 

 succeeding twelve-month period commencing June 1, 2001. Montana requested this release to be made 

 between May 1 and May 31, 2002. A volume of 542 dam (439 acre-feet), in addition to the minimum 

 flow, was delivered during this period. A hydrograph showing cumulative volume of the on-demand 

 release request and on-demand release delivery made at the East Poplar River at International Boundary 

 is shown m Figure 3.3 



