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r •A•+I' I <br /> y RES LTS OF SUBS i DENCE SURVEYS RECEIVED <br /> COAL BASIN MINES <br /> ITK N COUNTY, WMADO SCN 1,41983 <br /> MINED LAND RECLAMATION DIVISION <br /> Colo. Dept. of Natural Resources . <br /> 1 .0 INTRODUCTION � . <br /> s. This report resents the results of three surveys of the subsidence <br /> P P Y <br /> monitoring points In the I Basin area, Pitkin County, Colorado.:, The three <br /> monitoring surveys were pe formed In August 1981 , July 1982 and August 1983. <br /> ;. <br /> They were performed at the request of Mr. Douglas W. Bowman, Environmental <br /> Coordinator for MId-Conti nt Resources, , Inc., Carbondale, Colorado. <br /> 2.0 SCOPE OF WORK <br /> The scope of work for this project was outlined in a letter to Mr. Bowman - <br /> 4{ <br /> from Mining b Subsidence E gineering Company dated April 5, 1983. The scope of <br /> work was as follows: <br /> 1 . Survey the existing monitoring points during August 1983 2. Prepare a rep rt with the following information - - <br /> a. Method of survey ;. .a <br /> b. EquipEntrol <br /> nt used <br /> � . c. Coordates and elevations of existing <br /> points (TP-series) ' <br /> d. Coordinates and elevations of the nine .„ <br /> on i for i ng points for each of the 4.4fi <br /> field surveys in 1981, 1982 and 1983 ' <br /> e. Surtma les of the survey field data <br /> The field survey data which provide the basis for the engineering <br /> calculations in this repo t are presented In the Appendix to this report. <br /> 3.0 SURVEYING EQUIPMENT AND METHODOLOGY <br /> . 1 <br />