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<br />3073 <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />5. Pueblo Reservoir makes it possible for Colorado Springs to <br />divert water for municipal and industrial purposes from the <br />Arkansas River upstream from the reservoir by providing <br />replacement water to Pueblo and other Arkansas Valley commu- <br />nities. <br /> <br />6. Pueblo Dam and Reservoir will integrate community growth with <br />open space, ventilation corridors, and recreation facilities. <br />Under the current conceptual thinking, communities that do not <br />provide adequate recreational development and open space now <br />will be areas of social decay for urban renewal in the future. <br />If this is true, then the reservoir could prove to be consid- <br />ered an integral factor and deterrent to social decay. <br /> <br />7. A permanent pool containing initially 30,000 acre-feet and <br />1,290 surface acres will provide a new reservoir-type aquatic <br />ecosystem. (See Figure 3 on page 6 for 50 and 100-year capa- <br />cities.) <br /> <br />A littoral zone will form around the lake shore inCluding various <br />aquatic plants, food sources, spawning and protective fish <br />habitat. Quality of the littoral zone will be impaired by <br />fluctuation. <br /> <br />Seasonal drawdown will assist in controlling some aquatic <br />nuisance plants at times through planned water level control. <br /> <br />8. <br /> <br />A fluctuating water body will periodically inundate and expose <br />foreshore areas. This may not be compatible with the surround- <br />ing aesthetics. <br /> <br />9. <br /> <br />The biological productivity of Pueblo Reservoir is expected to <br />initially increase, reach a peak within a few years, then <br />decline, and stabilize at a lower level. Expected chemical <br />changes of the water will include a decrease in the bicarbonates <br />due, in part, to the mixing of higher quality west slope water <br />with east slope water, and dilution of pollution concentration <br />from upstream sources particularly during low flow periods. <br />All releases of water from the reservoir, except for emergencies, <br />will be strictly controlled to prevent supersaturation of <br />nitrogen. <br /> <br />Physical changes in the impounded waters include a stabilizing <br />of extreme water temperature, a reduction of turbidity, stabi- <br />lized quality of water, and fewer coliform bacteria. Should <br />cooler water temperatures and a higher oxygen content be <br />experienced after construction, a more favorable fishery <br />habitat may be expected. <br /> <br />39 <br />