2025-05-05_REVISION - M1999050 (3)

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. Mr. Joel Renfro RE: Timnath Connell Pit M-1999-050 April 29, 2025 the reclamation seed mix to a fast growing, cover crop grass mix to quickly stabilize soils prior to the anticipated development. Prior to the 2024 permit amendment, maintenance of the requested release area was to encourage the native grass growth, so herbicides have not been used and weed control of the area has been restricted to mowing. Active maintenance and mechanical weed control is still being performed in the area for perennial weeds (i.e. kochia, Russian thistle). However, significant growth of noxious weeds has not been observed within the area. With the approval of Amendment No. 1, annexation of the requested release area by the Town of Timnath, and the planned development, we believe that the area has been sufficiently reclaimed and is ready for release from the Timnath Connell Pit permit. A summary of compliance with Subsections 3.1.5 through 3.1.12 of Section 3.1, Reclamation Performance Standards, Construction Material Rules and Regulations, is provided below. 3.1.5 Materials Handling Backfilling and grading meets reclamation requirements. • No mining steep slopes or highwalls, drill or auger holes, or adits or shafts were created or left in the permit area for release. • Backfill has been adequately compacted for stability and future development and to prevent leaching of toxic or acid forming materials. However, no refuse, acid-forming, or toxic producing materials have been mined, produced on the site, or used in the backfill. • All slopes are 3H:1 V or flatter to stabilize soil and minimize erosion, sediment transport, and siltation on the affected land and adjacent properties. • Material from mining that could potentially cause unauthorized releases of pollutants to the surface drainage system was not mined or disposed of within the proposed area for release. • No unauthorized release of pollutants to groundwater occurred from materials mined or handled within the permit area. 3.1.6 Water—General Requirements Disturbances to the prevailing hydrologic balance caused by the proposed area for release were minimal. • The operator has complied with applicable Colorado water laws and regulations governing injury to existing water rights. • The operator has complied with applicable federal and Colorado water quality laws and regulations, including statewide water quality standards and site-specific classifications and standards adopted by the Water Quality Control Commission. • The operator has complied with all applicable federal and Colorado dredge and fill requirements. • No temporary or permanent siltation structures were constructed or left within the proposed area for release. • No dams were constructed in conjunction with the Timnath Connell Pit permit. Page 2 of 4