She noted that approximately 75 percent of the City of Cheyenne's public water supply is provided from surface water supplies. These four reservoirs are connected by pipelines in a totally gravity-driven system. Although each of the reservoirs have been in place for many years, little was known about basic water quality parameters in this four-reservoir system. The scope of this study was limited, in the main, to fall sampling that took place in 1997. Total dissolved solids, total algae and major ions concentrations are significantly higher in Granite Springs and Crystal Reservoirs than in the other two, higher-elevation reservoirs.
Manganese concentrations increase with depth in the reservoirs.
There was a limited number of algae species in the reservoir system. The water quality in these reservoirs is very good and the total dissolved concentrations, even in the lower two reservoirs, is low in comparison to the water supply with which many other cities have to contend. Ogle encouraged anyone seeking more information concerning the data and findings of her study to feel free to contact her.