39 



6.0 COOKSON RESERVOIR 



6.1 Storage 



On January 1 , 1 991 , Cookson Reservoir storage was 23 300 dam^ or only 54% of the full- 

 supply volume. During the year, precipitation was below normal resulting in below normal 

 inflows. Reservoir contents reached a maximum of 26 700 dam^ on July 6. Elevations 

 and corresponding volumes for several dates are shown in Table 6.1. In addition to 

 runoff, reservoir volumes were supported and maintained by ground water pumping. 

 Wells in the abandoned west block mine site supplied 5 700 dam^ to Girard Creek; 

 approximately one half of this volume was estimated to have reached Cookson Reservoir. 

 Wells in the soil salinity project area supplied 947 dam^ directly to the reservoir. 



Table 6.1 Cookson Reservoir Storage Statistics for 1991. 



