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08/24/99 <br />identified between monument nos. 109 and 111. No repair work has been performed in <br />these areas to date. <br />III. Map <br />The monitoring locations for the first half of 1999 aze shown on the First Half 1999, <br />Subsidence Map. The map also indicates the location of the longwall face on a monthly <br />basis. <br />IV. Conclusions <br />Subsidence monument and power pole surveys disclosed no unusual developments <br />during the reporting period. Subsidence magnitudes and projected draw angles were <br />within the anticipated ranges previously documented for the area. <br />Structures remained essentially unaffected during the period with the exception of the <br />predicted impacts to the county road, power poles and the two dwellings. During the <br />period of subsidence, the county road was maintained in good condition. The required <br />repairs to County Road No. 33 are tentatively scheduled for late summer/eazly fall 1999, <br />pending Routt County maintenance/road repair schedules. No adverse impacts, i.e. <br />imminent failure of structure, were evident with regard to the power lines. <br />Impacts to the two residential dwellings were as predicted. The cabin-t}~pe dwelling (#]) <br />nearest the gate road will require only minor repairs. Arrangements are in process with <br />the owner to replace the larger dwelling (#2) with a replacement structure. Replacement <br />of the structure is scheduled for this fall, pending completion of the required Routt <br />County building permits and weather conditions. <br />991 stHalfSubReport.doc Page 2 of 2 <br />