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Ex`~:;t~~t o0C <br />Subsidence Evaluation and 200-0 Geaog~c Hazard Field Observations <br />West F~ahron ~easc Fvea <br />• <br />• The image shown in Figure ? is within the arch of mining influence of tin-mined longwall <br />panels 2(1 :md 21 in the eastern part u( the I3ux Canyon mining urea, as well as in the urea of <br />influence of thcx longwall panels that extend into the West Flatiron Lcasc ama. <br />• Overburden depth to the B Scam is atxwt ?,150 feet. <br />8.2 location 2 <br />Lcxuuun ' is at?uut -1UU feet west of the 11'cst Flatiron boundary at the cliff outcrop of the Ohiu <br />Creek Member of the Mesaverde Formation above the eastern port of tin-mined longwall panel <br />2U. <br />• A gcwd virw of the rugged cliffs and lower slopes of West Flatiron is showm in Figure 4. The <br />area shown near the left margin of Figure 4 is within the area of mining inl7ucnce of un- <br />mincd longwall panels I8 and I9 for both the Box Canyon mining ama and the Wcst Flatiron <br />Lease area. <br />• <br />Figure 4. Norlnward view of the West Flatiron Lease area from Location 2. The felt s,de of the Image is <br />tha approxima!e boundary between the Box Canyon roir'nq area and the West F1aGron Lc+ase area. The <br />R::UfB r01'<'c~' t)~'R'I'~,ai II:.UC~?IIi '1.~'V` f0 C@f`: ' J' I'n' ~ r5' ..')~~ tU 11J~ f:lB)'-! C'fs 8rl ~:.i•I-J~C@(; L'^.i'(I <br />_';;1415 bG G:'v. <br />• <br />831 032.650 Wright Water Engineers, Inc Page 20 <br />November 2004 <br />