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Somerset Mining Company <br />1994 Annual Hydrologic Report <br />The Division stated: "This monitoring data is valuable in <br />characterizing the seasonal fluctuations of the springs in the area <br />that will be mined. The Somerset Mine should have resumed <br />monitoring these springs to establish a correlation between the old <br />data and what is occurring currently. In lieu of this, the mine <br />should conduct a spring and seep survey next year and compare this <br />data with that already collected. This will be necessary to <br />establish the baseline. The baseline will be used to see if the <br />proposed mining activity will have a detrimental impact on the <br />springs. Somerset should submit an interpretation of the <br />correlation of the monitoring results of the new data. This should <br />be .incorporated into the permit's statement of probable <br />hydrological consequences. The Somerset Mine should also commit to <br />a. monitoring plan that will monitor these springs during <br />subsidence. The following is a suggested monitoring plan and <br />schedule for submittal of information. <br />(a) The Somerset Mine will monitor springs and seeps 1 through 6 <br />monthly from March through October. Springs and seeps 7 <br />through 11 will be monitored monthly.. This will begin when <br />practicable and will continue through the end of 1993. <br />(b) The springs and seeps will be monitored for flow, pH, <br />electrical conductivity and temperature. <br />(c) The data from this monitoring and an interpretation will be <br />submitted with the 1992 Annual Hydrological Report. <br />(d) Monitoring will recommence one year prior to retreat mining <br />in the area of the springs and seeps and continue for an <br />additional two years after the area is retreat mined. An <br />interpretation of the results and correlation with past <br />monitoring results will be submitted with the next annual <br />report. <br />(e) For this permit revision, the application should identify the <br />source and use of these springs." <br />SMC responded by including new pages 2.04-29xviii & xix which <br />incorporated 1992 spring monitoring, revised pages 2.04-38i S ii to <br />add a discussion of Springs 1-11 and described the source and use <br />of the springs, revised page 2.05-46iii to include hydrologic <br />monitoring of the springs, revised page 2.05-46iv to include <br />interpretation and correlation of the spring monitoring data in the <br />1992 and 1993 annual hydrologic reports, and revised page 2.05-47 <br />to commit to the required monitoring plan. The Division then made <br />an additional requirement for SMC to commit to augmenting the flows <br />in the North Fork should any reduction in flows from the undermined <br />ephemeral drainages or springs be attributed to effects of mining. <br />