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Starting with mining of the main pits (to begin sometime in 2021), LRM will manage <br /> dewatering water throughout the process. They will collect water in trenches within the <br /> mine pits that will flow to dewatering sumps. From the sumps, pumps will send water <br /> through temporary pipelines to the water management pond (WMP). LRM will pump <br /> water for concrete production, and other site uses from the WMP. The WMP will also <br /> serve as a discharge of excess groundwater back into the alluvial aquifer system during <br /> mining. <br /> 1.2 Environmental Setting <br /> 1.2.1 Geology <br /> Regionally, the Site lies at the western margin of the Denver-Julesburg Basin with the <br /> Northern Rocky Mountain Front Range uplift to the west. The Project terrain is <br /> characterized by low relief fields and pasture. To the west-northwest of the Project lies the <br /> Bellvue Dome anticline, which has been breached by erosion exposing the Permian- <br /> Triassic age Lykins Formation at its core (Hagardorn, 2001). Resistant beds of Permian <br /> Lyons, Satanka, and Ingleside Formations cap the top of the ridge forming the east half of <br /> the dome. <br /> Locally, the Site overlies unconsolidated alluvial deposits of Quaternary age deposited <br /> during natural meandering of the ancestral Cache la Poudre River system. The alluvial <br /> sands and gravel were eroded from the Rocky Mountains to the west and deposited along <br /> broad areas of the river valley. Alluvial deposits underlying the Project can be <br /> characterized as poorly sorted (well graded)granite-sourced clays, silts, sands, gravel, and <br /> cobbles. These alluvial deposits are exposed at the ground surface and extend <br /> approximately 1,500 feet to the north of the Project,and for some distance south across the <br /> current Cache la Poudre River floodplain. Near the Project, the alluvium is deposited on <br /> an erosional contact with the Cretaceous Pierre Shale. <br /> 1.2.2 Groundwater <br /> Regionally, groundwater is a source of water for municipal, domestic, agricultural, and <br /> industrial uses within Larimer County;however,diverted Cache la Poudre River flows and <br /> Loveland Ready-Mix Concrete 2 December 2019 <br /> ,,,,Wy07_kn„ ��„ „> <br /> base�, d,rryua� summer, ' <br /> 1ELE 5 T o <br />