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<br /> <br /> <br /> <br /> <br />June 27, 2024 <br /> <br />Neil Thomson <br />E-470 Public Highway Authority <br />22470 E. 6th Parkway <br />Aurora, CO 80018 <br /> <br /> <br />Re: Henderson Development - File No. M-1980-110, E-470 Public Highway Authority <br /> Technical Revision (TR-6) <br /> <br />Dear Mr. Thomson: <br /> <br />On June 27, 2024 the Division of Reclamation, Mining and Safety concluded its review of the <br />Technical Revision application submitted to the Division on March 28, 2024, addressing the <br />groundwater conditions at the Henderson Development site. The revision includes the following: <br /> Summary of perimeter drainage investigation; <br /> As-built backfill conditions in the pit; <br /> Groundwater Monitoring Plan; <br /> Groundwater report summarizing existing conditions; <br /> Proof of compliance with Division of Water Resources requirements, and; <br /> Proposed Mitigation Plan. <br /> <br />The decision reached by the Division is: approve. <br /> <br />The terms of Technical Revision No. 6 approved by the Division are hereby incorporated into Permit <br />No. M-1980-110. All other conditions and requirements of Permit No. M-1980-110 remain in full <br />force and effect. <br /> <br />If you have any questions, please contact me by telephone at (303) 866-3567 x 8126, or by email at <br />Nikie.gagnon@state.co.us. <br /> <br />Sincerely, <br /> <br /> <br /> <br />Nikie Gagnon <br />Environmental Protection Specialist <br /> <br /> <br />M-GR-04