2024-06-25_PERMIT FILE - M2024032 (2)

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EXHIBIT G Water Information The proposed permit area is primarily in the NW'/a of Section 10, Township 9 North, Range 68 West of the Sixth Principal Meridian, Larimer County, State of Colorado. Introduction Coal Creek, an ephemeral/intermittent stream system, flows north to south just southwest of the proposed permit area. The North Poudre Ditch also runs adjacent to Coal Creek approximately 800 feet southwest of the proposed permit area. There are no other surface water resources near the site (see Exhibit C-4,Water Resource Map). The Coal Creek drainage has an associated regulatory floodplain, but neither Coal Creek nor the regulatory floodplain are within the proposed permit area. Because of the vertical elevation difference between the proposed site and the creek, the proposed project area does not contain any wetland communities associated with the creek. Colorado Division of Water Resources registered groundwater wells within 600 feet of the proposed affected area are illustrated on Exhibit C-4, Water Resource Map. However, the proposed mining operation does not anticipate encountering groundwater and no impacts to the surrounding groundwater hydrology are expected. Review of the construction logs from wells within 600 feet of the proposed permit area indicate static groundwater levels during well construction and pump installation to be much greater than 50 feet below the ground surface. As stated previously, the aggregate deposit on the 5J Pit site is expected to be relatively shallow, reaching a maximum depth of only about 25 feet below the ground surface. Additionally, non- mining related excavations on the property that extended to a depth below the aggregate deposit did not encounter groundwater. Groundwater on the proposed 5J Pit site is not expected to be exposed during mining or reclamation. If groundwater is encountered, the area will be backfilled to a minimum of two (2) feet above the normal groundwater elevation and a well permit and approved augmentation plan will be obtained from the Colorado Division of Water Resources before groundwater is exposed. Potential Mining and Reclamation Impacts The proposed mining operation will have no effect on site water resources. Water is primarily used for dust control and shall be trucked from legal off-site sources. Water use for washing of product materials is not anticipated. As discussed in previous sections, the operation is not expected to encounter groundwater during mining and stormwater will not be retained in the active mine pit or in the reclaimed pit area. Water Quality Mining and reclamation operations shall comply with Colorado Department of Public Health and Environment Colorado Discharge Permitting System (CDPS) for stormwater management. A 5J Pit DRMS 112 Permit Application Page 16