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III IIIIIIIIIIIII III <br />999 <br />r ~Ua:: ~:!±• <br />~` ~la~:~ z`' C. <br />COAL COMPANY <br />RECEI~/E® <br />August 8, 1990 <br />nuc i o ~sso <br />MINEd LAND <br />REr~MATION DIVISION <br />Mr. Harry Ranney <br />Colorado idined Lar.3 P.cclamation <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203-2273 <br />RE: File No. C-81-041 <br />Dear Mr. Ranney: <br />In response to our phone conversation August 6, 1990, the <br />following information is being supplied on monitoring wells: <br />Cottonwood and Rapid Creek piezometers were drilled through <br />surface alluvial material until bedrock was encountered. The <br />first 10' of each well was cased with 8" steel pipe. A 4" PVC <br />pipe was installed in the hole and packed with gravel. A <br />cement plug was poured between the 8" and 4" pipe at <br />approximately ground level. The holes were drilled the <br />following depths: <br />GWMS-OlA 23' <br />GWMS-O1B 22' <br />GWMS-02A 40' <br />GWMS-02B 40' <br />GWMS-03A 35' <br />GWMS-03B 20' <br />Unit 'Frain Loadout piezometers were drilled into surface <br />alluvial material. Approximately 5' of each hole was cased <br />with 8" steel pipe. A 4" PVC pipe was installed in the hole <br />and packed with gravel. A concrete plug was poured between the <br />8" and 4" pipe at approximately ground level. The holes were <br />drilled the following depths: <br />UTL-O1 29' UTL-03 22' <br />UTL-02 23' UTL-04 25' <br />POWDERHORN COAL COMPANY • P.O. BOX 1430 • Palisade, Colorado 81526 • (303) 464-7951 <br />