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COLORADO LEGACY LAND <br /> $CHWARTZWALDER MINE <br /> EXHIBIT E. RECLAMATION PLAN <br /> The Schwartzwalder Mine(Site)is a former underground uranium mine located on Colorado Legacy Land,LLC <br /> (CLL) property in Jefferson County near Golden, Colorado (Exhibit B). The mine was operated by Cotter <br /> Corporation N.S.L.(Cotter) from 1966 until May 2000,when mining operations were permanently terminated, <br /> and Site decommissioning and reclamation activities began. In March of 2018, CLL purchased the <br /> Schwartzwalder Mine and surrounding property from Cotter,acquiring title to 559.20 acres of real property <br /> including underlying mineral rights, certain water rights, and responsibility for meeting regulatory <br /> requirements for environmental protection and eventual Site closure. CLL property encompasses <br /> approximately 87 percent (%) of Section 25,T2S, R71W, of which 76.22 acres are permitted for reclamation <br /> under Colorado Mine Land Reclamation Permit(MLRP) M-1977-300 (Exhibit F).Figure E-1 presents photos of <br /> each mine opening closure shown in Exhibit F. <br /> E.1. CONCEPTUAL CONSIDERATION <br /> In accordance with Condition #2 of the Succession of Operators Plan, (letter dated February 20, 2018), a <br /> conceptual site model (CSM) of the Schwartzwalder Mine was provided to Colorado Division of Reclamation, <br /> Mining and Safety (DRMS) on November 6,2018.The CSM was updated in December 2021 and is provided in <br /> Appendix 1.The CSM defines and describes the key environmental features of the Schwartzwalder Mine site <br /> (Site), with particular focus on the hydrologic and geochemical mechanisms that are expected to <br /> influence/control the flow and chemistry of water in and around the Site.A summary of the CSM is provided <br /> below. <br /> • Uranium mining of the Schwartz Trend occurred from 1953 to 2000.The Schwartz Trend is a thin band <br /> of brittle garnet biotite gneiss and quartzite between the East Rogers and West Rogers Faults that <br /> hosted uranium ore and surrounding sub-ore enriched mineral deposits. <br /> • The Ralston Creek Alluvium is largely confined to stream deposits of limited thickness and extent along <br /> Ralston Creek which was present pre-mining and was affected by waste rock deposited during mining <br /> activities. <br /> • Colluvium and weathered bedrock contain limited amounts of groundwater located in a thin veneer <br /> on hillsides and in drainages tributary to Ralston Creek,which are localized, of limited areal extent, <br /> and strongly affected by seasonality. Groundwater in low-permeability bedrock is associated with <br /> regional faults and associated fracture systems that contain the limited occurrences of groundwater, <br /> which either recharge the mine when pumped down or can act as conduits of groundwater away from <br /> the mine when it is not pumped down. <br /> • Climate and hydrology play a key role in any hydraulic connections between the mine workings and <br /> Ralston Creek. <br /> o Average annual precipitation of 18.66 inches per year (in/yr) is offset by an average <br /> evaporation rate of 35 to 40 in/yr. <br /> o Excess precipitation flows as runoff or shallow groundwater towards Ralston Creek. <br /> • Currently a pipeline diverts Ralston Creek from upstream of the mine area to below the mine area.This <br /> bypass pipeline prevents Ralston Creek from interacting with contaminated alluvial soil.The alluvial <br /> MAY 2022 9 AMENDMENT 6 <br />