3.5 M 



0.35 5 





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 in the East Poplar River during the 12 -month period commencing June 1. 

 Based on the runoff volume of 10,050 dam^ (8,150 acre-feet) recorded at the Poplar River at 

 International Boundary gauging station during the March 1 to May 31, 2003 period, Montana was 

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

 succeeding 12-month period commencing June 1, 2003. Montana requested this release to be made 

 between May 1 and May 31, 2004. A volume of 728 dam^ (590 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 in Figure 3.3 



