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Mountain Coal Company <br />West Elk Mine <br />Post OtTiee Bmr 591 <br />Somnset, Colorado 81434 <br />Tdeplnrr 970.97D5015 <br />September 12, 1996 <br />n~r`.FIVF_D <br />CEP 16 1996 <br />Mr. David Berry <br />Colorado Division of Minerals and Geology DIVIbitl~lUllriiHClpioGUdtlIU9Y <br />1313 Sherman Street, Raom 215 <br />Denver, CO 80203 <br />lte: Mautz Damage Complaint - Response to CDMG Letter Dated 9/5/96 <br />Dear Mr. Berry: <br />III IIIIIIIIIIIIIIII <br />999 <br />/\ <br />MCC has received your letter dated September 5, 1996, which requests additional information <br />regarding item number two of the Division's letter dated August 9, 1996. MCC provides the <br />following additional comments concerning the Division's item number two of the Auguri 9, 1996 <br />letter. <br />The conclusions of the Daman and Moore report of 1993 titled "I-andshde investigation Report, <br />Jumbo Mountain, Somerset, Colorado", are supported by reon ground observations of the area by _ <br />MCC and Dames and Moore (see page 3 of the Dames and Moore report, labeled Drawing No. 1, ` <br />titled "Plan of Jumbo Mountain Landslide"). Dames and Moore concluded in 1993 that: <br />historically, Were has been landslide activity in We area, and smaller scale, active landslides are <br />occurring on steeper parts of the old landslide mass; Were movements are likely to continue wiW or <br />without mining, particularly during spring snowmelt; however, subsidence from longwall mining <br />may lead to surface cracking, which may be difficult to distinguish from cracking due to landslide <br />movement <br />During We inspection of the Mautz property on August 27, 1996, Mr. Jim Pendleton of your office <br />slated that We conclusions of the Dames and Moore report of 1993 were essentially accurate. MCC <br />agrees wiW Mr. Pendleton and We Dames and Moore report that We cracks observed during We <br />inspection are primarily related to landslide activity, wiW We possibility of some influence from <br />mining related subsidence. The ground observations of recent weeks by MCC and Dames and <br />Moore also substantiate We current permit predictions (see page 2.05-107) regarding subsidence. <br />Sincerely, t`'~.pv/~J/ <br />Norm~~E ry ~ ~ v <br />Project Engincer <br />ce: Phil Schmidt <br />Christine Johnston <br />KaWy Welt <br />