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AIM <br />Wriaht Water Enaineers. Inc. <br />2490 West 26th Ave., Suite 100A www.wrightwater.com <br />Denver, Colorado 80211 e-mail: gwitt@wrightwater.com <br />(303) 480-1700 TEL <br />(303) 480-1020 FAX <br />February 28, 2018 <br />Mr. Leigh Simmons <br />Colorado Division of Reclamation, Mining and Safety <br />1313 Sherman St., Rm. 215 <br />Denver, CO 80203 <br />Re: Fall 2017 Subsidence Monitoring Report Preparation — Mountain Coal Company, LLC. <br />Dear Mr. Simmons, <br />The following report entitled Fall 2017 Subsidence and Geologic Field Observations — South of <br />Divide and Dry Fork Mining Areas, was prepared by, and under the supervision of, Gary D. Witt, <br />a licensed professional geologist and employee of Wright Water Engineers, Inc. <br />Sincerely, <br />WRIGHT WATER ENGINEERS, INC. <br />By MIA X,1 AUA\j <br />G W , P.G., CM <br />13332 Vie es nt <br />,�„J, , �� i t • 11 Sr. drogeologisdGeolcgical Engineer <br />Z:\Project Files\72-99\831-032\831-032.799\Engineering\Fall Subsidence 2017\Report\Covers, Dividers and Signature Page\signaturepage.doc <br />GLENWOOD SPRINGS DURANGO <br />(970) 945-7755 TEL (970) 945-9210 FAX (970) 259-7411 TEL (970) 259-8758 FAX <br />