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III IIIIIIIIIIIII III <br />STATE OF COLUKADO <br />MINED LAND RECLAMATION DIVISION <br />Department of Natural Resources <br />1313 Sherman St.. Room 215 <br />Denver, CO 80203 <br />303 866-3567 <br />FAx 303 832-8106 <br />Mr. Jim Stover <br />Minrec, Inc. <br />2768 Compass Drive, Suite 101 <br />Grand Junction, CO 81506 <br />oF.=~~ <br />~Q~_' 9 <br />NP ~.~'8 <br />. i' ~ <br />~ -~~.v <br />L, <br />~ l8P6 ~ <br />Roy Ramer, <br />Governor <br />Michael B. Lorry, <br />Diviswn O~reclor <br />RE: Quarterly Bench Stability Monitoring and Semi-Annual <br />Hydrologic Bench Monitoring; Blue Ribbon Mine; File No. C-81-047 <br />Dear Mr. Stover; <br />The Division has reviewed the two reports which list the data <br />collected during June 1992 for the mine bench stability monuments <br />and the April and June 1992 data for the piezometer water levels at <br />the Blue Ribbon Mine. <br />The survey results indicate that the bench continues to be <br />structurally stable. Very little movement has occurred since the <br />monuments were installed in 1985. No Division concerns have <br />resulted from review of the data collected in June 1992. <br />The monitoring of the water levels in the piezometers installed on <br />the face and crest of the portal bench do not indicate any reason <br />for increased concern. I am assuming that depth to water in the <br />piezometers are measured in feet. In future reports, please make <br />sure that all data includes units. Also, it would be helpful in <br />the Division's review of the data, if graphs of water levels for <br />all piezometers were included in your semi-annual reports. No <br />Division concerns have resulted from review of the data collected <br />in April and June 1992. <br />Please let me know if you have any questions. <br />Sincerely, <br />C~G~~~~ <br />Christine E. o nston <br />Reclamation cialist <br />a:brbenchrpts <br />