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On Februan 19. 2001. cracks fmm hairline to about !%: inch were first noticed along <br />County Road #33 from stations 29] to 293. Visual observations of County Road #= <br />through the last survey on March ] S. 2001 indicated similar cracks fran stations 290 to <br />294, primarily along the road shoulder. along the centerline of the road and along pre- <br />existing cracks. No repair work was required to County Road #3 ~ as a result of TCC's <br />mining activity. <br />As of July 27, 2001. this section of County Road #33 has been sealed and chipped b~ <br />Route Counts. Twentymile therefore. does not anticipate that am' further maintenance <br />work will be perfornted on this road. <br />111. Man: <br />The monitoring locations for the first half of 2001 are shown on the First half of 2001- <br />Subsidence Map. The map also indicates the location of the longwall face on a monthly <br />basis. <br />IV. 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. <br />Structures remained essentially unaffected during the period with the exception of the <br />predicted impacts to the Union Pacific Railroad and Routt County Road No. 33. No <br />adverse impacts. i.e. imminent failure of structure, were evident with regard to these <br />structures. <br />2001_IstHalfSubRepon.dos Pagie2of2 07/31/01 <br />