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STATE OF COLORADO nlC Hnap D. LAMM. Gavemm III IIIIII III IIII III <br />D EPAflTMENT OF NATURAL RESOURCES 999 <br />D. Monte Pascoe, Executive Director <br />MIlVED LAND RECLAIVIA'TION <br />423 Centennial Building, 1313 Sherman Street <br />Denver, Colorado 80203 Tel. (300) 866-3567 <br />August 9, 1982 <br />Ms. Kathleen Gordon <br />Colorado Westmoreland Inc. <br />P.O. Box E <br />Paonia, Colorado 81428 <br />David C. Shelton <br />Director <br />RE: Stipulation No 5 to Permit C-038-81 <br />Monitoring System Layout for Surface Facilities <br />Dear Pis. Gordon: <br />The Division has reviewed the above referenced submittals. In response <br />to stipulation No. 5, Colorado Westmoreland Inc., has committed to <br />semi-annual subsidence monitoring reports, whose proposed format satisfies <br />our informational requirements. Therefore, Colorado Sestmoreland Inc., <br />has satisfied the report format submission requirements contained in <br />Stipulation No. 5 to permit No. C-038-81. <br />The report prepared by Geo-Hydro Consulting'besign of Ponitoring System <br />Layout for Surface Facilities, Orchard Valley P1ine, Paonia, Colorado" was <br />reviewed by Jim Pendleton. The report details a proposed installation of <br />electronic tiltmeters and water pressure transducers within the areas <br />of the surface facilities at the Orchard Valley mine which have been <br />determined to be marginally stable. This determination was arrived at <br />in the Phase II stability analysis prepared by Geo-Hydro Consulting, Inc. <br />and approved by the Division. <br />The proposed monitoring system represents state-of-the-art monitoring <br />techniques. As such, it is acceptable to the Division for use in monitoring <br />the stability of the surface fills and cuts in question. Tl~e system <br />should be installed as soon as possible. <br />If you Dave any questions on these items, please call me. <br />Since~rely~, <br />t ~ ~~~ <br />Sandra L. Emrich <br />Reclamation Specialist <br />SE/ep <br />cc: P1r. Floyd Johnson, OSP1 <br />Y <br />