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1990 



Saskatchewan Environment and Public Safety reported quarterly on the 

 water quality at four locations in the Poplar River Basin during 1990. 

 Sites included Girard Creek south of Coronach, Cookson Reservoir at 

 Highway 36, Cookson Reservoir near Morrison Dam, and East Poplar River 

 immediately below Morrison Dam. Sampling at these sites was carried out 

 in February, May, August, and November. 



A review of the data from these locations showed concentrations of vir- 

 tually all water quality variables to be within the recommended water- 

 quality objectives for the East Poplar River (Table 4) . At the Girard 

 Creek station, single anomalous excursions were noted for zinc and chro- 

 mium. Spring runoff in 1990 was much below the long term normal. Res- 

 ervoir water quality (dissolved salts) improved only marginally in the 

 spring relative to the preceding winter water quality. Figures 27, 28, 



Figure 27. — TDS concentrations in Cookson Reservoir at 

 Morrison Dam for the period 1981-90. 



