2023-11-21_GENERAL DOCUMENTS - M1974069

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Ms. Stephanie Fancher October 30, 2015 Page 3 memorandum for additional information on the characterization of the aquifer and water level changes that are expected to occur from the proposed mining operation. Nearby Wells and Structures and Potential Impacts from Mining Operations Water Supply Well Concerns In order to determine potential impacts resulting from the mining operation, BBA inventoried nearby wells and structures adjacent to the proposed pit. We reviewed the Colorado Division of Water Resources' well permit database to identify any wells within the vicinity of Pit 21 that could potentially be impacted by the mining and subsequent lining of Pit 21. With the development of the neighborhoods around the Larimer Pits over the last couple of decades, the majority of the houses in the vicinity are now on City of Loveland water and no longer rely on well water. The database identified four historical wells that were located to the south and not within what we believe to be the alluvial boundary of Pit 21. As described below, we believe these wells no longer exist or are no longer operable. • Well Permit No. 14654— LRM contacted the well owner and learned that the well is now inactive and not operational and has not been used for over 10 years. This well is located outside of the primary alluvial aquifer system and in the topographically higher terrace / colluvial deposits. In BBA's 2014 modeling efforts, it was determined that water level changes will not occur at the location of this well. • Well Permit No. 3610 — This well was investigated by LRM and determined to be once located on the nearby Celebration Church property. LRM contacted the Church and spoke with the Pastor who has been on site at the church property for more than 7 years. He indicated that the church does not use any well on the property, and in fact, is not aware that a well has been used at all in recent years. In the previous BBA modeling investigations, we did not project any water level drawdowns would occur at the location of this well because it is located outside of the primary alluvial aquifer. • Well Permit No. 2810 — LRM researched the well and learned that the well no longer exists as it is now located within a residential neighborhood / subdivision. In the previous BBA modeling investigations, we did not project any water level drawdowns would occur at the location of this well because it is located outside of the primary alluvial aquifer. • Well Permit No. 3614 — Please note that the registered location for this well is not accurate. LRM contacted the well owner who is a former employee and learned that the well is located as shown on Figure 1, but the registered location is within the pit mining area, which is not accurate. LRM learned from the well owner that they have not used their well in over 10 years and have no plans to use it in the future. In the previous BBA modeling investigations, BBA did not project any water level drawdowns would occur at the location of this well.