2022-11-18_PERMIT FILE - M2022048 (5)

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EXHIBIT G WATER INFORMATION Introduction The site is located about 1 . 5 miles west of Platteville, Colorado. Please refer to EXHIBITB-VICINITY MAP for the property configuration and the relationships to surrounding geological features . The site is bordered on the south, west and northwest sides by irrigated agricultural lands and on the east and part of the northeast side by the South Platte River. There are no ditches that cross the property but, on site temporary feeder ditches carry water to the fields being irrigated. Two center pivot irrigation systems are fed by wells owned by L.G. Everist, Inc. There are 7 registered irrigation wells, one domestic well and 6 piezometers on the property. Within 200 feet or the permit line there is 1 Domestic and one Geothermal wells located in the southwest corner of the site. Based on regional groundwater studies and the experience gained by L.G. Everist, Inc. during numerous previous permit applica- tions they have found that slurry wall liners mitigate any im- pacts to groundwater on nearby areas surrounding a lined reser- voir. Ground water in this area tend to flow from the west towards the river, the depth to water on the flood plane level averages 6 . 9 feet below the surface and along the western terrace deposit the depth to the water table is 23 feet. Data for the monitoring well information collected thru the month of submittal is shown on TABLE G-2 ON SITE GROUNDWATER MONITORING DATA. If any significant groundwater changes do occur, they can be mitigated as discussed below. Potential Water Resource Impacts Ground Water Wells We expect this mining operation will have no or minimal impacts on the prevailing hydrologic balance. Sand and gravel mining related impacts to groundwater wells near the pit will be mitigated through the installation of slurry walls around the perimeter of new reservoir mining phases prior to the start of dewatering in each reservoir phase (see EXHIBITD-MININGPLAN) . TABLE G-1 WATER WELLS WITHIN 200 FEET is a list of 12 wells from the Office of the State Engineer' s files that are located within 200 feet of the permit area. (NOTE: THE WELL PERMIT LOCATION SHOWN IN THE TABLE HAVE BEEN GPS LOCATED BY THE STATE ENGINEERS OFFICE'S AND GROUND VERIFIED) . All wells except the geothermal well (Blue highlight) are shallow wells, at this time, there is one shallow well within 200 feet of the permit area that is not owned by L.G. Everist, Inc. The Palombo domestic well is located near the southwest corner and is up gradient from the mining area. LGE owns the 8 wells listed L.G. EVERIST, INC. -WEST FARM RESERVOIRS 28 November 2022