40 



The Poplar River Power Station is dependent on water from Cool<son Reservoir for 



cooling. Power plant operation is adversely affected when reservoir levels drop below 

 749 metres. The dead storage level for cooling water used in the generation process is 

 745 metres. The 1991 recorded levels and associated operating levels are shown In 

 Figure 6.1. As indicated in Figure 6.1, 1991 reservoir levels are below ten-year median 

 levels. 



_, 756 



Zj 754 

 i$ 7S3 

 7S2 



(/) 



> 751 



CO 749 



UJ 



aC 748 



^ 747 



Z 746 



-£ 74S 



Q 744 



^ 743 



3 742 



^ 741 



y Full Supply Level 



"VMi 



nimum Desired Operating Level 



''Unusable Storage Level 



MEAN DAILY WATER LEVEL FOR 1 991 



— MEDIAN OF MONTHLY MEAN ELEVATION FOR 1 981 -1 990 



JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 



1991 



Figure 6.1 Cookson Reservoir l\/lean Daily Water Levels for 1991 

 and Median IVIonthly Water Levels for 1981-1990. 



