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<br />-z- <br />permit application stems from inadequate details in the mine plan for these <br />facilities and areas. The assessment of mining impacts should be quantified, <br />and the analyses used in assessing each projected impact should be included in <br />the application. <br />In other words, the Division needs to know the following before it can make <br />permit findings: <br />1) what areas the applicant is going to disturb, <br />2) what are the hydrologic characteristics of disturbed and adjacent <br />areas (the present hydrologic balance), <br />3) how the company is going to disturb the areas, <br />4) how the mining operation's disturbances will affect the hydrologic <br />balance, <br />5) what specific measures the company will take to minimize impacts to <br />the hydrologic balance in disturbed areas. <br />Alluvial Valley Floors - Rules 2.06.8 and 4.24 <br />The Division has adequate information to make the finding that the Colorado <br />River's alluvial terraces and alluvium within and adjacent to the permit area <br />are alluvial valley floors (AVF's). <br />Additional information on the Colorado River AVF's is needed prior to making <br />the required written alluvial valley floor findings. The necessary additional <br />information includes: <br />1) a map of all lands that are currently or were historically flood <br />irrigated, within two miles of the mining operation (this includes <br />rail lines), <br />2) a detailed map of AVF areas disturbed by the rail line to the <br />loadout, the loadout, the access and light use roads, as well as any <br />other mine-related surface facilities on a map which includes all <br />irrigated and historically irrigated lands. <br />3) a calculation of the total area of the AVF's within and adjacent to <br />the permit area. <br />4) a calculation of the total disturbance to the AVF's during <br />construction of the mine facilities and during operation of the <br />facilities, <br />5) a characterization of the essential hydrologic functions of the AVF's <br />(infiltration rates of soils, depth to ground water through the <br />growing season, application rates of Irrigation waters, and aquifer <br />characteristics of the alluvial and colluvtal bodies), <br />6) measurements of vegetation productivity and type on the AVF's, both <br />in the permit area and adjacent areas, <br />