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<br /> <br />Susan Mowry <br />April 7, 1987 <br />Page 2 <br />o Impacts of mining can be adequately assessed by keying <br />monitoring locations to current and past mining and <br />adding monitoring locations as mining advances. <br />Applied Hydrology Associates, Inc. has reviewed the existing <br />plan, the permit renewal application, and the adequacy responses <br />(AHA prepared a large portion of the adequacy responses) and has <br />developed a revised monitoring plan which WECC feels will detect <br />potential impacts from mining should they occur. <br />Should production increase the <br />simply be expanded in a shorter <br />extent of mining. <br />hydrology monitoring plan will <br />time frame to keep up with the <br />The revised monitoring plan currently includes all areas to be <br />mined north of the Minnesota Creek Drainage Basin divide, so no <br />monitoring changes or additions will be necessary until mining <br />begins south of the divide. <br />Reporting will change to an annual basis, with raw data kept at <br />the mine site. Summaries of data will be provided in the Annual <br />Hydrologic Report. <br />Should you have questions regarding the revision, please contact <br />me. <br />Si erely, <br />~~-.ids ~~yL <br />Dennis Conn <br />Director of Permitting and <br />Environmental Compliance <br />DC/sds <br />Enclosures <br />cc: Bill Wagener <br />Joanne Williams, Gunnison County <br />