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<br />6.3 Sanborn Creek Mine Water Discharge <br />Outfa11011 is OMI's CDPS mine water discharge point from Sanbom Creek Mine that <br />discharges into Sanborn Creek. Outfal1011 was sampled in May, June, September and <br />December of 2000 and analyzed for the full-suite of groundwater quality pazameters, as required <br />by Technical Revision No. 20. The data collected from Outfa11011, along with the results of <br />laboratory analyses aze presented in Section 5. Minimum and maximum measurements for the <br />baseline year(s) of this resource maybe referenced in OMI's 1998 Annual Hydrology Report. <br />Although analyses of mine water samples may have shown higher levels than baseline data for <br />some pazameters, based on a January 30, 1995, Colorado School of Mines, Division of <br />Environmental Science and Engineering final report entitled, "Aquatic Impairment Study of the <br />Sanbom Creek Mine Discharge, Somerset, Colorado", OMI believes that no impact resulted. <br />The report concluded that mine water dischazges from the Sanborn Creek Mine have minimal <br />effect on stream macroinvertebrates. Also, there is little, if any effect on the overall food base <br />for fish, and the use of the river for fishing is not impaired. <br />The mine inflow locations are presented on the Mine Inflow Map in Section 7. <br />170 <br />