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Mountain Coal Company <br />Date: October 7, 1994 <br />Subject: Monitoring Nell Data <br />From/Location: Mark Scanlon <br />TolLocation: Kathy Welt <br />Internal Correspondence <br />The following monitoring well information is contained within the A4CC drill hole files: <br />WELL INFORMATION <br />SOM-38-H-3 No data pertaining to this well e,~ists in MCC's drill hole files. Wel)s H-1 <br />and H-2 were constructed using 4" diameter steel casing. <br />B-32 No data pertaining to this well exists in MCC's drill hole files. <br />SOM-80 Records show that a 7 7/8" hole at SOM-80-H vas advanced to 142.E ft. <br />The records do not indicate the diameter of the casing which was installed. <br />The PVC casing which .vas installed is presumed to be 4" I.D. <br />SG-1 The records indicate that this well has a total depth of 84 ft. The bottom <br />depth is presumed to be the same. The diameter is utilotown but might be <br />calculated from draw down data or presumed to be 4 1/2" O.D. which is the <br />same as in wells SG-2, 3, 8 4.. <br />GP-~ No data pertaining to this well exists in MCC's drill hole files. <br />SObI-13 SOM-13-H was completed using 4" [.D. PVC casing. <br />SOM-38-H-2 The collar elevation per the USGS well report is 7873 ft (a.m.s.l.). Total <br />Depth (T.D.) of the hole per the geophysical logs is 862 ft. Coring <br />description indicates this hole was advanced to at least 948.4 ft. A hand <br />written note suggests this hole may have been advanced to 960 ft. The true <br />T.D. of this hole is unknown. <br />SW-1 thru 6 No data pertaining to these wells exists in MCC's drill hole files. <br />(alw laawn u SUB P I dw SUB P 6) <br />SOM C-72 See attached Well Completion Report. <br />SOM-127-H See attached Well Completion Report. <br />SOM-23 H-2 SOM-23-H-2 vas completed using 4" I.D. plastic casing. <br />SOM-l28 H See attached Well Completion Repoli. <br />®® <br />West Ell: Mine, Somerxt, Colorado <br />