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Water Information-Amendment <br /> consists of two eastward-trending reverse faults, each with a down throw <br /> to the south with vertical displacement along the two faults of 350-475 feet. The <br /> sedimentary units associated with the San Juan Basin are shown below and a <br /> broader discussion is presented in Attachment G-1. The shaded units are located <br /> in the mine area. (Sources: Eckel, 1949); <br /> San Juan Basin Hydrologic <br /> Age Formation Hydrogeologic <br /> Characteristics <br /> Unit <br /> Upper Cretaceous Mancos Shale Confining Layer Well yields as much as 10 gpm <br /> Dakota Sandstone Dakota Aquifer Well yields as much as 10 gpm <br /> Upper Jurassic Morrison Formation Morrison Aquifer Well yields as much as 25 gpm <br /> Junction Creek Sandstone <br /> Wanakah Formation <br /> Entrada Sandstone Not significant in Colorado <br /> Jurassic and Dolores Formation Not considered significant in <br /> Upper Triassic Colorado <br /> Permian Cutler Formation Base of San Juan Basin-not considered significant in <br /> Colorado <br /> Rico Formation <br /> Pennsylvanian Hermosa Formation <br /> Further discussions on the relationships of aquifers with respect to the mining <br /> operations are presented in Section 6.4.21(8), Exhibit U. <br /> (d) Surface and groundwater monitoring <br /> The Operator commits to complying with applicable CDPHE and the Water <br /> Quality Control Commission's applicable permits and surface and groundwater <br /> baseline quality criteria. <br /> 6.4.7(3) Projected Water Requirements <br /> Water Rights: Water will be used for mining and if necessary,dust control. <br /> The Operator has La Plata River water rights to consumptively use 12 acre feet(ac/ft.) <br /> and to divert one cubic feet per second(cfs.) <br /> Mining: The estimated project maximum"out of priority"water consumption <br /> requirement for the mining operation is estimated to be approximately 2 ac/ft. per year <br /> May Day and Idaho Mine Application <br /> 112(d)Permit <br /> M-1981-185-Amendment <br /> Revised March 10,2017 <br /> Exhibit G—Rule 6.4.7 Page 3 of 5 <br />