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<br />This annual hydrologic report is the second report submitted for <br />f the Mt. Gunnison No. 1 Mine and covers the period from October 1, <br />' 1982 through September 30, 1983. The report provides a summary <br />and interpretation of hydrologic monitoring data at the Mt. <br />' Gunnison No. 1 Mine through Water Year 1983 and an assessment of <br />hydrologic impacts. Detailed listings of monitoring data for the <br />,, year are contained in the quarterly reports. <br />' This report is divided into two sections. The first section <br />describes monitoring activities through Water Year 1983. The <br />second section interprets the hydrologic data collected during <br />' the year and relates this information to mining and reclamation <br />activities at Mt. Gunnison to assess the impacts, if any, on the <br />hydrologic balance. This section also addresses hydrologic im- <br />' pacts that might be expected to occur during Water Year 1984 and <br />includes recommendations for future monitoring. <br />Report Conclusions <br />An extensive baseline monitoring data base has been developed for <br />' the Mt. Gunnison No. 1 Mine. Operational monitoring started in <br />August, 1981 with commencement of construction activities at Mt. <br />' Gunnison. <br />' Monitoring data for the period October 1, 1982 to September 30, <br />1983 show no significant adverse impacts on the hydrologic <br />balance associated with mining activities at the Mt. Gunnison No. <br />' 1 Mine. <br />-3- <br />