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WSP00139
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Last modified
1/26/2010 12:12:57 PM
Creation date
10/11/2006 9:32:43 PM
Metadata
Fields
Template:
Water Supply Protection
File Number
8443.600
Description
Narrows Unit - Studies
State
CO
Basin
South Platte
Water Division
1
Date
2/1/1978
Author
US DoI BoR
Title
Special Report Investigation of Review Issues Narrows Unit - Colorado Pick-Sloan Missouri Basin Program
Water Supply Pro - Doc Type
Report/Study
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<br />The microscope slide artificial substrate samplers were used to collect <br />algal samples. At both stations the clearly dominant alga was <br />Navicula sp., which constituted 71 and 94 percent of the algae observed <br />at the Masters and Ft, Morgan sites respectively, Among the other <br />common diatoms at the Masters site were Synedra sp., Cyc1ote11a sp., <br />and Oiatoma sp" along with the green alga Ulothrix sp, The only other <br />relatively common alga at the Ft, Morgan site was Dip10nia smithii, <br />The SOl's for the slides at the Masters station ranged from 1.0 to <br />2.2. At the downstream site the range was between 0,2 and 1,8. <br /> <br />The low SOl's obtained from both the macro invertebrate and the algal <br />samples are indicative of an enriched, i.e. eutrophic condition. Although <br />the actual number of organisms collected in the samples was relatively <br />low, an SOl of less than three is usually considered indicative of a <br />trend toward such enrichment (Otto, 1974). This fully confirms the. <br />results of the al ga 1 assays. <br /> <br />Suitabil ity of Reservoir for Recreation and Fishery <br /> <br />The following factors were considered in appraising the probability of <br />primary body contact sports with respect to bacteriological conditions: <br />(1) the water quality meets the proposed State standards for primary <br />contact sports, (2) the only current standard not met during the <br />recreation season is the fecal streptococcus standard. However, there <br />are indications that the fecal streptococci that are present are not <br />of human or domestic origin and therefore, may be of little sanitary <br />significance, This would have to be verified with a sanitary survey. <br />On the basis of the above~ it appears the factors favoring the future <br />sui tabil ity of the reservoir for. primary contact recreation outwei gh <br />those that would prevent its development, Primary contact recreation <br />development should be retained in the plan. <br /> <br />The results of the temperature simulation indicate that the reservoir <br />would support a warmwater fishery. They also show that a put-and-take <br />co1dwater tailwater fishery could usually be maintained for about 10 <br />months of the year, In some years there could be some oversummer <br />survival of co1dwater fishes in such a tai1water fishery. <br /> <br />23 <br /> <br /> <br /> <br /> <br />!,-.' <br /> <br /> <br />. ,.~ <br /> <br />
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