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As shown in the table of Figure 4, this segment of the stream is classified for aquatic life, recreation, and <br />agriculture. In 1988, a revision was done to specifically address the classification of Stream Segment Number Nine. <br />In this revision, it was decided that "no water supply uses exist or are anticipated in upper Imogene and Sneffels <br />Creeks and the existing quality is poorer than the dissolved manganese criterion for a water supply classification" <br />[1]. This indicates that the water impacting Sneffels Creek will be most greatly affected by aquatic life, recreational, <br />and agricultural standards. Because recreation standards are very fundamental, the overall impact of these <br />classification standards on the overall DRMS standard recommendation is neglected. Thus, the in- stream and <br />agriculture classifications play an important role in determination of the proposed DRMS standards, and will be <br />discussed further in the explanation of methodology section. <br />An important aspect of the data displayed in the table above are the "table value standard," or TVS limitations. <br />Any parameter with a "TVS" limitation required a hardness calculation to be completed to determine this value. <br />The hardness downstream noted in the current CDPHE discharge permit for the Revenue Mine was used to <br />complete this calculation. The permitted downstream hardness is equivalent to 96 mg/L as CaCO3. The complete <br />set of in- stream standards used to aid in development of DRMS standards are shown below in Table 3. <br />10 <br />