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HALL IRWIN 155 RECEIVED <br /> CORPORATION <br /> JUL 0 7 2021 <br /> DMSION OF RECLAMATION <br /> MINING&SAFETY <br /> Eric Scott July 7,2021 <br /> Environmental Protection Specialist <br /> Colorado Division of Reclamation, Mining & Safety <br /> 1313 Sherman Street RM#215 <br /> Denver, CO 80203 <br /> RE: Response to DRMS letter dated May 6, 2021, Adequacy review for Baseline Resources M1997- <br /> 058 Amendment to Technical Revision No 3 dated April 28,2021. <br /> Dear Eric Scott: <br /> To follow-up with Hall-Irwin's letter dated June 7`h, 2021, and to formally respond to Item No.5 <br /> of your letter dated May 61h, 2021, regarding the above listed technical revision for the Baseline <br /> Resources Permit NO. M 1997-058, we offer the following: Enclosed you will find the attached <br /> documents required to satisfy the Baseline Pit which currently has a small area above grade <br /> classifying it as a jurisdictional dam. These documents include the design review by Civil <br /> Resources and the response by the State Engineers Office. The requirements for the pit now <br /> require a new at grade concrete cut-off wall in lieu of a spillway. Per the attached letter, the State <br /> Engineer has agreed with the approach and classified the dam as a non-hazardous dam. The <br /> design now calls for a minor 100 ft at grade concrete cut-off wall as well as some minor <br /> earthwork along the North end of the Site. <br /> Hall-Irwin has completed the earthwork and is now the process of getting the small concrete cut- <br /> off wall built. Additionally, we have included an updated site map to remove the spillway and <br /> added the at grade concrete cut-off wall at the North-East corner of the North cell. <br /> We believe that with these new documents we now have completed the required response from <br /> your letter dated June 61h, 2021, as it relates to Item No. 5. <br /> After you have had a chance to review, feel free to reach out to me with any questions or <br /> comments. <br /> Sincerely, <br /> Ed Lafferty <br /> Executive VP <br /> Hall-Irwin Corporation <br /> Office 970-587-6908 <br /> Cell 970-539-1336 <br /> Email eafferty@hall-irwin.com <br /> 5586 W 1 9" ST. SUITE 200 , GREELEY, CO 80634 <br /> 970-587-7200 ♦ 970-352-6284 FAX <br />