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• <br />Existing Ground Level <br />Minimum 3' Compacted Fill Above Cement <br />PVC Cap I <br />7 Minimum 1' Extension Above Existing Ground <br />i <br />Material: Mine Backfill <br />Backfill Depth: Approximately 50' <br />Bore Hole Size: 12 a' - drilled with mud <br />Surface Casing: 8 g' O.D. Steel Pipe ( Schedule 20, 88" I.D.) <br />Casing Depth: Approximately 70' or at minimum 20' into competent material <br />Casing will be collar /threaded joints (8 round) and pressure cemented <br />9 Surface Casing must extend at minimum 1' foot above existing ground level <br />Ground Surface to top of cement is 3' of compacted fill <br />Material: Dakota Formation (Shale and lenticular Sandstone) <br />Depth Below Surface Casing: Approximately 100' to top of aquifer <br />Bore Hole Size: 7 8" <br />Well Casing Size: 44" O.D. PVC Pipe (Schedule 40, 4" I.D.) <br />Cement outside casing using cement basket/soft formation packer <br />Must use an approved centralizer every 50' <br />Confined Aquifer Under Pressure <br />Screen will be mill slotted (0.020 inch slot size) and same diameter as well casing <br />Depth to Aquifer: Approximately 170' below existing surface <br />Static Water Level: Expected to be approximately 40' below existing surface <br />Screened Interval expected to be approximately 40' <br />Annular space between screen and borehole left open <br />Estimated Total Depth: 210' <br />WESTERN FUELS ASSOCIATION, INC. <br />New Horizon North Mine <br />Water Well Construction <br />Specifications <br />MLLE: <br />None <br />DRAWN Of: <br />GPM <br />DATE: <br />629/2011 <br />CNRD en: <br />REVS O" <br />Dec. ND.: <br />fgurel -1 Avg <br />