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well is designated by the title AVF-13 and the downstream alluvial well by the title AVF <br />-14. The upstream site is known as SW -13 and the downstream site is known as SW - <br />14. <br />The 17 Right Panel has one alluvial well and one surface site associated with it. The <br />alluvial well (downstream of AVF-14) is designated by the title AVF-15 and the <br />associated surface site (downstream of SW-14) is known as SW-15. These sites were <br />installed to provide non-subsidence downstream sites, following subsidence of AVF-14 <br />and SW-14. The monitoring sites are shown on the attached First Half of 2003 <br />Subsidence Map. Period of record data tables for these sites is also attached. <br />The monitoring did not indicate any significant impacts to Fish Creek due to <br />Twentymile's mining activities. The monitoring data is presented on the attached tables. <br />The monitoring program is in-place, and hopefully, 2004 will be a normal yeaz and <br />impacts, or lack thereof, to the system will be detected by the established wells and <br />surface sites. <br />V. Conclusions: <br />Subsidence monument surveys disclosed no unusual developments during the reporting <br />period. Subsidence magnitudes and projected draw angles were within the anticipated <br />ranges previously documented for the area. The angle of draw ranges between 17.5 to <br />19.5 degrees as follows. Survey data indicates the angle of draw to be approximately <br />17.6 degrees for the 14 Right panel in the vicinity where the railroad track crossed the <br />head gate entry. Survey data over the 13 Right panel indicates the angle of draw to be <br />approximately 19.4 degrees in the vicinity where the railroad track crossed the head gate <br />entry. Survey data over the current 15 Right panel indicates the angle of draw to be <br />approximately 18.8 degrees in the vicinity where the railroad track crossed the head gate <br />entry. <br />Structures remained essentially unaffected during the period with the exception of the <br />predicted impacts to the Union Pacific Railroad and Fish Creek. No adverse impacts, i.e. <br />imminent failure of stmcture, were evident with regard to these structures. <br />2003_ I stHalfSubReport.doc Page 2 of 2 10/08/03 <br />