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RULE 4 PERFORMANCE STANDARDS <br />Memorandum. <br />FOR: I A. Kiger <br />hiay 23, <br />The purpose of this ttumoraodum is to address Certification of Colawryo's Haul Road Segment A and <br />Segment B. <br />it is my understanding that CDMG rules have changed to require, for all had toads and access roads <br />constructed prior to August 1, 1995 a "relevant showing, on a cast by cue basis, which may include mamtering <br />dam or other evidence" that roads am in compliance with spplicable perfar aance standards. <br />As you am aware, Colowvo's had toad was constructed in 1977 and the a is no care at becatsm who <br />can certify the construction of the haul road. The revised CDMG regulation pas pryten <br />an* = cannot cerify construction of a rand which he did not witness or supervise. To do so would risk <br />eaaceDation of their pro assional license. Fm this reason, it is not passible for the Colowyo haiJ road <br />construction to be certified by a P.E.. <br />i can, however, provide the following qualitative haul road performance certifieatiou based in par. an 1) <br />the reported 19 year puformance history of the structure and 2) based upon my current observations of the daily <br />performance of the haul road. <br />1 atn a mining eagineer, registered in the State of Celorado, and experienced in the construction and <br />iropeciitat of haul roads. <br />To the lest Of MY k=M-4e, based upon the available informstirm regarding the reported, long term 19 <br />year pafamanca ofCdowych's Haul Road and my aagaing observation of the performance of Colowyo s Haul <br />Road, i believe then is shigizeat qualitative evidence available to suggest that the HiaW Road is in compliance <br />with the applicable performance standards of the CDMG regulations in accordance with Rule 4.411. <br />g" 'en R iiiai?etneyet <br />25436 ,Lj ado Registered P.E. <br />U. R.G. Addnson <br />Date <br />a-5 <br />Rule 4 Performance Standards 4.03-4 Revision Date: 6/23/08 <br />Revision No.: MR-91