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Lachel & <br />rn1 Associates <br />A SCNNABEL ENGINEERING COMPANY <br />March 31, 2014 <br />Ms. Julie Mikulas <br />Martin Marietta Materials, Inc. <br />10170 Church Ranch Way, Suite 201 <br />Westminster, CO 80021 <br />Subject: Project 13364013, 2014 Annual Report, Structural Geology Evaluation, <br />Specification Aggregates Quarry, Golden, Colorado <br />Dear Ms. Mikulas: <br />LACHEL & ASSOCIATES, INC. (Lachel) is pleased to submit our geological engineering report for the <br />annual structural geologic evaluation for the Specification Aggregates Quarry located in Golden, <br />Colorado. This report documents the results and conclusions of our 2013 -2014 field mapping effort and <br />structural geology evaluation. This study was performed in accordance with our proposal dated October <br />4, 2013. <br />Lachel appreciates the opportunity to work with you on this project. Please call us if you have any <br />questions regarding this report. <br />Sincerely, <br />LACHEL & ASSOCIATES, INC. <br />Matt Koziol, EIT <br />Senior Staff Engineer <br />Wen L. Lee, Ph.D.,PG <br />Senior Associate <br />MK:WL:CC <br />\ \dunnsvr1 nt \projects \13364013 - Spec Ag Quarry\report\FINAL 2014Spec- Agg- Report_Lachel.docx <br />2014 ANNUAL REPORT <br />ladhel.00m <br />T/ 972 - 250 -3322 F/ 972 - 250 -3325 <br />17330 Preston Road, Suite 120A / Dallas, TX / 75252 <br />