2025-02-04_REVISION - M1991133 (5)

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Reclamation Plan for Robins Consolidated Expansion Pit Antonito, Colorado Exhibit E Reclamation Plan Introduction The Robins Consolidated Expansion Pit, located in Antonito, Colorado, is subject to reclamation requirements as stipulated by the Colorado Division of Reclamation, Mining, and Safety (DRMS) under the Department of Natural Resources. This reclamation plan outlines the necessary steps to ensure the pit's closure complies with all applicable regulations and promotes environmental sustainability. Objectives The primary objectives of the reclamation plan are: • To restore the land to a condition suitable for its designated post-mining use. • To stabilize the site and prevent erosion, ensuring long-term ecological integrity. • To promote the re-establishment of vegetation and wildlife habitats. • To protect water quality and manage stormwater runoff effectively. Site Description The Robins Consolidated Expansion Pit is a gravel mining site situated in Antonito, Colorado. The site covers an area of approximately 68 acres, with varying topography and soil composition. The existing pit cover approx. 46 acres The surrounding land use includes agricultural fields, natural habitats, and residential areas. Reclamation Phases The reclamation process will be executed in several phases, each focusing on specific aspects of site restoration (See Exhibit F) . The reclamation plan will coincide with the Stormwater objectives. Final grading and placement of Topsoil along with stabilization measures will be conducted in phases (approx. 6.8 acres at a time). Pre-Closure Planning A detailed site assessment to evaluate existing conditions, including soil quality, vegetation cover, and water resources concluded the following: It has been determined existing topsoil will be salvaged and stockpiled adjacent to pit operations. . Topsoil depth is 6 inches. It is estimated