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91 10~4ERM COLOWYO CORL <br />.:ONrRACTORS I~' <br />ENGINEERS <br />DEVELOPEAS <br />~MORRISON-KNUDSEN COMPANY, INC, <br />F%ECU7iYF OFFICE <br />MOPR170N~KNUOEEN PLAZA <br />Pa. ecz 7eoueo~sF. ~oA.lo uc •. e9729 <br />PHONE. (20E179&59901TELE%' aeaue <br />April 14, 1986 <br />P.4 q <br />Lrc-a (9oli- <br />REPLY l0 MORP170N•KNUO7EN COMPAHY.INC. <br />PO. BOx +7x79 <br />7AN ANiQNIQ, iERA7 U 9 A 7E217 <br />Pr+ONF cs+re2.~ae1 <br />Mr. D, J. Rose <br />Operations Manager <br />Yampa Mining Company ,- <br />P. 0. Box HH <br />Hayden, Colorado 81639 = =~ <br />Subject: Certification of Dutfall 003 -,Faci.l.i.ti.es-Pond <br />Dear Mr. Rose: <br />On Aprii II, 1986 I performed an inspection of the outfaii 003 located at <br />the Facilities Pond at the Hayden Gulch Mine. I am a registered Profes- <br />sional Engineer in the State of Colorado and am experienced in the design <br />and supervision of earthen construction. <br />The purpose of my inspection was to certify the structure as required in <br />Rule 4.05.06(7) of the Colorado Mined Land Reclamation Division (CMLRD). As <br />part of my inspection, I have reviewed the permit design documents, surveyed <br />information of the site, and have inspected the structure. I have also <br />discussed the construction of the structure with the engineering staff at <br />the mine. <br />The structure named herein has been constructed to a design that approxi- <br />mates that of the original permit application and has adequate storage and <br />flood prevention characteristics. The construction of the structure has <br />been accomplished using prudent and proper Construction techniques. <br />I hereby certify the structure as meeting the criteria of the CMLRD as <br />defined above and as approved in the current Mine Permit. <br />P. E. No. 17570 <br />