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~~.-, <br />-2- <br />6) The mine plan map indicates that lands outside the permit area <br />(Minnesota Basin) will be mined in later years (1987-1994). WECC <br />should include a mine plan the works for the current permit area <br />(assuming we can't permit within Minnesota Creek Basin), The Division <br />in its findings document will need to look at all "anticipated <br />mining." The mine plan map 3.4.4A would imply that WECC and the <br />Division anticipate mining in the Mlnnesota Creek Basin. <br />7) WECC should include a breakdown of both total (cummulative) and permit <br />revision lands that will be "affected" (including subsidence) and <br />"permitted". <br />8) A map should be included that identifies the total "affected" area. <br />That is, the area to be potentially affected by subsidence. <br />9) The permit application should include a discussion of mine inflow <br />currently experienced and a prediction of how this wil] change during <br />mining in the new permit area. A current and future discussion of mine <br />consumption should also be included. <br />10) The 1984 Annual Hydrologic Report indicated that nearly one half of <br />mine inflow is from sources not being measured by WECC since the source <br />is less than 3 gpm. WECC needs to delineate and estimate all inflows <br />into the mine. This is needed to characterize current impacts and <br />understand what future impacts could occur from mining. A discussion <br />of the source of all inflows as well as a prediction of future <br />anticipated inflows in the permit area should be provided. <br />11) WECC should indicate how mine inflows are collected and measured. In <br />line flow meters or flume/weir installations will be needed to <br />accurately measure all mine inflow and discharge. <br />12) The regulations concerning impacts to the hydrologic balance as well as <br />a stipulation to the existing Mt. Gunnison permit requires WECC to <br />characterize the quality of mine inflows and discuss the impacts of <br />discharging the water. WECC should provide the results of full list <br />water quality analysis (including metals and trace elements) on the two <br />major sources of mine inflows and the discharge (if any) of water from <br />the Sylvester gulch portal. An interpretation of the data is also <br />needed. <br />/fw <br />Doc. No. 9721 <br />