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2.05.6(3)(b)(iv) <br />Records of the above monitoring will be kept on site and submitted <br />to the Division quarterly and with the annual hydrology report. <br />Significant mine inflows that may or may not be pumped, will be recorded <br />and promptly reported to the Division. <br />The spring monitoring data, Springs 1 - 11, interpretation and <br />correlation with past monitoring will be submitted with the 1992, 1993 <br />and 1994 annual hydrologic reports. No mining will be performed within <br />the angle of draw of springs 1-6 or springs 10 & 11 until the baseline ' <br />monitoring and interpretation of the data is complete and approved by the <br />Division. <br />Flow in the ephemeral and intermittent streams and Aubbard Creek <br />will be estimated by calculating the velocity of flow through a measured <br />cross-sectional area of the stream channel. Flow in the North Fork of <br />the Gunnison will be obtained from the nearby USGS gauging station. <br />The sealing of all of the Somerset Mine portals precludes obtaining <br />underground water samples. Wells B-6 and H-10 are used to monitor <br />groundwater inflow and quality in order to predict the extent of flooding <br />in the underground workings. <br />The operations of the Sanborn Creek Mine are not expected to impact <br />the hydrologic balance of the area. Surface water monitoring points S-1 <br />and S-2 are designed to sample the flow in Sanborn Creek above and below <br />the disturbed area. Sanborn Creek will receive mine dewatering water <br />from the mine. This source of water will cause Sanborn Creek to flow <br />year around. Monitoring point S-1 flows during spring run-off and <br />significant precipitation events. The disturbed area and mine water <br />could affect the quality of water in Sanborn Creek only when there is <br />flow at S-1. For this reason, S-2 will be monitored only if S-1 has <br />flow. <br />Surface water monitoring point P-1 is located in a sediment trap <br />drop inlet located near the portal area. This monitoring point is <br />designed to assure that the surface run-off from Small Area Exemption A <br />and C meets the requirements of Rule 4.05.2(3). This monitoring point <br />is further discussed in section 2.05.3(4)(B). <br />Surface water monitoring points U-1 and C-1 are designed to verify <br />that the underground mine does not have an adverse effect on the quality <br />or quantity of run-off in the unnamed drainage or Coal Gulch which are_ <br />both ephemeral streams. Monitoring results are expected to be similar <br />to those collected in 1981 and 1982. <br />Surface water monitoring points NF-1 and NF-2 are designed to sample <br />the flow in the North Fork of the Gunnison River above and below the <br />Sanborn Creek Mine disturbed area. Monitoring results are expected to <br />be similar to those collected in 1981 and 1982 and further, no <br />significant difference in quality is expected between the upstream and <br />downstream monitoring points. <br />2.05 - 96iv <br />Rev. 1:10-15-93 -" - _- <br />