Laserfiche WebLink
EXHIBIT G <br /> WATER INFORMATION <br /> Introduction <br /> The site is located about 1 . 5 miles west of Platteville, <br /> Colorado. Please refer to EXHIBIT B - VICINITY MAP for the <br /> property configuration and the relationships to surrounding <br /> geological features . The site is bordered on the south, west and <br /> northwest sides by irrigated agricultural lands and on the east <br /> and part of the northeast side by the South Platte River. There <br /> are 2 irrigation return flow ditches that cross the property and <br /> other onsite temporary agricultural feeder ditches that carry <br /> water to the fields being irrigated. Two center pivot irrigation <br /> systems are fed by wells owned by L.G. Everist, Inc. There are 7 <br /> registered irrigation wells, one domestic well and 6 piezometers <br /> on the property. Within 200 feet or the permit line there is 1 <br /> Domestic and one Geothermal wells located in the southwest corner <br /> of the site. <br /> Based on regional groundwater studies and the experience <br /> gained by L.G. Everist, Inc. during numerous previous permit <br /> applications they have found that slurry wall liners mitigate any <br /> impacts to groundwater on nearby areas surrounding a lined <br /> reservoir. Ground water in this area tends to flow from the west <br /> towards the river, the depth to water on the flood plane level <br /> averages 3 . 55 feet below the surface and along the western <br /> terrace deposit the depth to the water table is 19. 5 feet . Data <br /> for the monitoring well information collected thru the month of <br /> submittal is shown on TABLE G-2 ON SITE GROUNDWATER MONITORING DATA. If <br /> any significant groundwater changes do occur, they can be miti- <br /> gated as discussed below. <br /> In May 2023 a Groundwater Model (GWM) was prepared by <br /> Schnabel Engineering to provided potential impact information of <br /> the ground water levels by installing Slurry Wall liners around <br /> the reservoirs . That report is provided at the end of this <br /> exhibit . In addition, Molen and Associates was asked to prepare <br /> a Water Quality Monitoring Plan for the permit area. That plan is <br /> also included in this exhibit . These reports are used in the <br /> following text to establish the mitigation and testing plans for <br /> the West Farms Reservoirs mine. <br /> The mining operation will have minimal effect on the South <br /> Platte River in the form of minor groundwater depletions due to <br /> evaporation and water uses associated with mining. The depletions <br /> to the South Platte will be mitigated thru a temporary Substitute <br /> Water Supply Plan (as required and approved by the Division of <br /> Water Resources) to prevent injury to vested senior water rights . <br /> L.G. EVERIST, INC. -WEST FARM RESERVOIRS May 2023 <br /> 28 <br />