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01/04/1999 11:44 9700748615 <br />E SC~WAF & <br />E. SCHAAf & ASSOCIATES, INC. <br />U.S. MINERAL and REGISTERED LAND SURVEYt7RS <br />• Alaska, Arizona, [olorada, Nevada and New Mexico <br />361 Palmer Street. P.O. Box 631 <br />Delta, Colorado 81416 <br />PA(~ 02 <br />(970) 874.7413 <br />Fez (970) 874-8615 <br />Subsidence ,Mxritoriny AY~oort <br />Paxierhorn Coe l Ccmvany <br />Subsidence Monitoring for Stations SAK11, SM172, 9Mn.9, SM04 end SM05: ' <br />Previous monitoring date indicates the elevation without curvature and refraction <br />to be as follows: <br />Date: Fell of 1998 1 <br />Base 5,164.00 <br />SM171 4,868.81 ~ ' <br />SI~p? 4,898.44 <br />F,M73 4,970.14 <br />I , 5)Nn4 4, 985.44 <br />SM~S 5, 120.97 <br />• Asia= d/17/97 Date: 12/18/97 ~, ` <br />SAIl71 4,868.75 4, 888.90 I <br />SMC12 4,898.29 d, 8,98.47 <br />SMt73 4, 870. 13 <br />SMtld 4,985.50 <br />SIM73 3, i?1.00 <br />fie fo7laring is the rscalculatian of the Fall of 1996 data using curvature and <br />refraction: <br />Oats: Recalculation of Fel) of 1996 <br />57AD1 4,869.36 <br />SM02 4,898.68 I <br />SiMb3 4, 970.44 <br />SM1~4 4,985.68 <br />SMt)5 S, 121. B2 <br />Which would adjust the 4/17/97 and the 12/18/97 to be as follows: <br />Oata: Adjusted 4/17/97 Defe: Adjusted 12/18/97 I <br />SMt71 4,869.30 4,889.45 <br />SM172 4,898.53 4, 8918. 71 <br />9hOl? d, 970.47 <br />SMt74 4, 985. 74 <br />SAA75 5,121,85 <br />• <br /> <br />1998 Subsidence Exhibit 1 12-31-98 <br />