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Somerset Mining Company <br />1993 AHR <br />Page 3 <br />included to present flow, conductivity, iron, total dissolved <br />solids and Manganese for Hubbard Creek and the North Fork of the <br />Gunnison River. The graphs for Hubbard Creek compare data from <br />1991 through 1993. The graphs for the North Fork of the Gunnison <br />River compare upstream and downstream results from 1991 through <br />1993. <br />Sanborn Creek, the Unnamed Drainage, Coal Gulch, and Hawksnest <br />- Creek all had recorded flows during the spring thaw in March and <br />Aril. Lower Sanborn Creek also had recorded flows as a result of <br />the mine water discharge. The flow from these drainages was <br />_ consistent with prior years monitoring results. The flow in <br />Hubbard Creek and the North Fork of the Gunnison River was <br />- monitored as in prior years. <br />There was no recorded flow at A-Gulch, B-Gulch, C-Gulch, Hoopla <br />- Gulch or Bardine Canyon. Bear and Elk Creeks are not monitored. <br />Springs 1 through 6 were monitored during June, July, August and <br />September. The historical data for the springs is presented in the <br />permit on pages 2.04-29vii through 2.04-29xii. Spring 1 was noted <br />as dry. Springs 2 through 5 had conductivity measurements that are <br />comparable to the historical data. However, the high pH <br />measurements for the springs taken during 1993 are suspect. <br />Spring 6 had a recorded flow of 1 gpm in June 1993. Its <br />conductivity was 360 umhos/cm. The historical data indicates the <br />conductivity for this spring should not exceed 175 umhos/cm. This <br />lack of correlation indicates a potential problem with spring <br />numbering and location. <br />. Springs 7 through 11 were monitored June through December 1993. <br />The historical data for the springs is presented in the permit on <br />pages 2.04-29 xiii through 2.04-29 xviii. Spring 7 had recorded <br />• flow in June 1993. The historical data for Spring 7 indicates it <br />is typically dry. <br />Spring 8, the flow from the Oliver Mine, had recorded flow during <br />all of the monitoring events during the year. The monitoring data <br />collected during 1993 compares quite well with the historical data. <br />The conductivity measured during 1993, (1600 to 4900 umhos/cm) is <br />almost the same range contained in the historical data which is <br />1900 to 4000 umhos/cm. The pH measurements taken during 1993 are <br />suspect. The flow measurements taken during 1993 were somewhat <br />less than the historical data. <br />The monitoring data for both Springs 9 and 10 also compare quite <br />well with the historical data. Both of these springs exhibit high <br />conductivity (1700 to 4900 umhos/cm), which indicates the water has <br />been in contact with coal and/or shale formations. The historical <br />