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91 10 ~ d7RM COLUWYO i~~qL <br />r <br />CONTRACICJRS <br />ENGINEERS <br />DEVELOPERS <br />~MORRlSON•KNUDSEN COMPANY, INC. <br />ExEGUi'vE OFFICE <br />MORR190N~KNU09EN PLASA <br />PO 60x1101/BC19E.IOA~.O U.9.A 8.7126 <br />PNONE QBBI 7B}90001 :Eldx: 79BU0 <br />April 14, 1986 <br />Mr. D. J. Rose <br />Operations Manager <br />Yampa Mining Company <br />P. 0. Box HH <br />Hayden, Colorado 81639 <br />P.hiB <br />LTC-10 (901) <br />RER.T 10. MORR16C~WKNUCSEN COMPANY MC. <br />Po eo%naiv <br />9AN ANTL`NIO. TE7fA9 U.9.A 71St) <br />PNONE: (91 a(Bt1.B111 <br />Subject: Certification of Outfall 006 -s'Tip~1e••pond-"A", <br />Dear Mr. Rose: <br />On April 11, 1986 I performed an inspection of the outfall 006, located at <br />the Tipple Pond "A" 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 ~ 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 the 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 <br />defined ab `~ <br />44~ ~~e(s <br />• ~~ ' <br />/- ['eE a . `175+ <br />JES:sr <br />the structure as meeting the criteria of the CMLRD as <br />,approved in the current Mine Permit. <br />o ~pXa o: egi stered P. E. No. 17570 <br />.,...•- <br />~. <br />~--..= <br />