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TUM & RSFOCIRTES TEL -995-7191 Rpr 13.• 3=09'No.002 P,02 <br />•~~12i 1995 2•. ~3 FROM -IOHEER EHOIHCEIl1HB 10 17130937!91 p, •2 <br />• <br />Tp; ,~ ~~ ~ DATIS: Apri112,1996 <br />8'R+OM: Carl Gerity ~~- <br />$UlfJECT: Progroea Report on Tatum BoMe Bubeidenoe issues <br /> <br />The purpose of this report is to update you on savors! items that relate to the <br />subsidence problems with your house at 6olitario ranch. This incladea a review of <br />the letters and memoranda by iaveatigatera that hs~e been sabaaitted since the <br />initial report flrom Pioneer Ea . in January 1886. A oorredion to that report <br />world include a revision of the age of the house 5rom 90 years to 60 years, this st111 <br />represents a long time tp stand without damage. <br />As a result of the reference dted by Peadlewa~ ,I conducted a literature search to <br />locate all work thnt had been done by the U$ Geological Survey or the U8 Bureau of <br />Mines in the Weston Colorado area. 0 two studies were located, a report by <br />Woodward-Clyde Consultants for the AIlea Maw, and a report by the Colorado <br />School of Mines at the York Cant Mine in Baton, New Mexico. <br />CONCLUSIONS <br />The conclusions of the letter / memo by State of Colorado, Department of Natural <br />Resources, Division of Minerals and Qco .dated February 16,1996 and the <br />Office of 8utface Miniaa in a Memo dates ebruary 18,1986 and a letter dated <br />February 28,1896 are not neceesarily au the study by Woodward- <br />Clyde at the Allen mine, or the report by e a~ineere, Inc dated March 18, <br />1996.The latter concladea that shining related sabeidance could have caused the <br />problem. <br />• The Office of Surface Mining used as incorrect model in their computer <br />subeidenoe analysis. The correct model indicates that mine-influenced ground <br />movement could certainly have ageoted the Tatum house. <br />• MBHA maps are not regaired to ba accurate with respect to surface features, <br />ezcept railroadB sad highways. There ate several examples related to the Golden <br />F.ag a mine where they are not. <br />U. S. OFFICK OF aURFA~CE MINING <br />i <br />The letter dated February 28.198b from Charles E. Sandberge bas mis- <br />aharacterized the ragas manta of MBFiA is it's map rules. Mine maps are not <br />required to show sur tbaturee ezcept for railroads and highways, and aceording <br />to Bill Kemp of the Denver MBEA offiw aqq snrfhoe features are inddental and are <br />certainly limited in aocaracy to the acceptable range associated with the scale of the <br />rasp. <br />