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J. E. STOVER & ASSOCIATES <br />2768 COMPASS DRIVE, SUITE 101 <br />GRAND JUNCTION, COLORADO 81506 <br />PHONE: (970) 245-4101, FAX 242-7908 <br />MINE ENGINEERING <br />MINE RECLAMA710N <br />December 6, 1999 <br />Dan T. Mathews <br />Division of Minerals and Geology <br />2148 Broadway, #C5 <br />Grand Junction, CO 81503 <br />Re: Powderhorn Coal Company <br />Roadside Portals; Permit No. C-81-041 <br />Quarterly Report -Hydrology Monitoring <br />Dear Mr. Mathews: <br />III IIIIIIIIIIIIIIII <br />999 <br />CIVIL ENGINEERING <br />CONST. MANAGEMENT <br />DEC - 7 1999 k <br />~. '. b . <br />~. <br />The following data are presented for the third quarter (July ~J September) 1999. <br />Surface Water <br />SWGS-01 Rapid Creek <br />SWGS-02 Cottonwood Creek <br />SWGS-03 Rapid Creek <br />SWGS-06 Coal Creek <br />SWGS-08 Jerry Creek <br />Spring and Seep <br />Data enclosed pages SG-27 & SG-28 <br />Data enclosed page SH-25 <br />Data enclosed page SI-25 <br />August 11 peak 700 - 800 cfs <br />August 11 peak >356 cfs <br />March or April - No data enclosed <br />Ground Water <br />GWMS-01,02 & 03 -May & September <br />Refuse pile piezometers <br />Unit train loadout <br />Piezometer N-1 North Decline <br />Rollins 1, 2, 3, 4 <br />Please let me know if you have any questions. <br />Sincerely, <br />~O~ "~ <br />J. E. Stover, P.E. <br />Consulting Engineer <br />Data enclosed page GA-2 <br />Data enclosed form dated 8/14/99 <br />Data enclosed pages GB-1 & GD-12 <br />72.6 8/25/99 <br />Data enclosed pages GE-1, GE 6 ~J 9 <br />cc: PCC File <br />