Laserfiche WebLink
Doc Date:1 211 1120 01 II I I II I II I II IIII III <br />sss <br />ENGINEERING & SURVEYING COMPANY <br />DODGE ST. • DELTA, COLORADO 81416 • 303-874-7593 • FAX 303-874-7570 <br />7881-93 <br />Subsidence and Slope Stability <br />March 12, 1993 <br />!~?R 5 7993 <br />• <br />Mined Land Reclamation <br />423 Centennial Building <br />1313 Sherman Street <br />Denver, Colorado 80203 <br />~_ .... <br /> <br />Re: Subsidence and Slope Stability monitoring: <br />Bear Coal Company <br />Bear Mine No. 3 <br />Somerset, Colorado <br />iTTE ENrINEERINr AND SUR~TEYING COMPANY rnmpleted th? subsirianra <br />and slope stability survey during November, 1992 for the Bear <br />Mine #3. <br />This survey is based on 2 control monuments located across the <br />canyon on the property of the Somerset Mining Company (formerly <br />Kaiser Coal Company), that have been in place for several years. <br />The monuments are referred to as D-11-U and D-12-U. See Map for <br />location. The monuments are 3-inch pipe with a 4-inch plate so <br />the elevation will be fixed for each reading. The coordinates of <br />the monuments are: <br />Northing <br />D-11-U 405,065.78 <br />D-12-U 405,418.32 <br />Easting ELevation <br />1,440,549.5'/ 6185.92 <br />1,441,625.51 6195.50 <br />These coordinates and elevations will remain fixed and all other <br />points will be relative to them. <br />We have developed a sequence for the surveys that divides the sta- <br />tions into primary control loops and points tied by sideshot <br />only. All stations are 3" diameter steel pipe described in our <br />report dated August 10, 1985 unless noted otherwise. <br />C~ <br />