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Lorerteifo Curtyort Minr -Aquatic Terhnicat ReOOrt <br />• The metrics indicate that the stream periphyton communities within the analysis area are in good <br />condition. Shannon diversity ranged from good to excellent and had taxa ranging from 12 to 31 <br />taxa. The pollution indices indicated low to no pollution, and the siltation indices indicated some <br />siltation problems. Even with an indication of fairly high siltation, the periphyton community <br />appears to be in good health. <br />These good metric ratings observed at the Lorencito Canyon stations represent healthy conditions <br />given the intermittent nature of this drainage. As with the fisheries and macroinvertebrate data, <br />the periphyton data suggests that these sampled reaches of Lorencito Canyon are perennial. <br />Water Quality and Quantity <br />For a complete description of water quality and quantity within the aquatic resources analysis area, <br />refer to the Surface Water Resources section of the Permit Document. This section describes in <br />detail the hydrology of the stations inventoried for aquatic biota as well as several other <br />intermittent/ephemeral drainages and stock ponds. <br />SECTION 4.0 REFERENCES CITED <br />• CDOW, 1996. Personal communication from Jim Melby, CDOW regional fisheries biologist. <br />Colorado City, CO. July 8th, 1996. <br />EPA (United States Envirottmental Protection Agency) 1989. Rapid Bioassessment Protocols For <br />Use In Streams and Rivers: Benthic Macroinvertebrates and Fish. Office of Water (WH-553). <br />EPA/444/4-89-001. <br />Greystone 1996. Water Resources Technical Report for the Lorencito Canyon Mine Permit <br />Application. <br />USFWS, 1996. Letter responding to request for comments. Dated February 13, 1996. <br />Woodling, John. 1985. Colorado's Little Fish. A Guide to the Minnows and Other Lesser <br />Known Fishes in the State of Colorado. Colorado Division of Wildlife. <br />• <br />aquatic 075/December 5, 1996 8 <br />