2001-12-07_REVISION - M1983067 (26)

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~nks and Gesso, LLC EXHIBIT G: Water Information Overview This section describes the existing water features in and nearby the proposed mining permit area, potential impacts on water resources due to mining, and water requirements for the project. Local surface water features in the vicinity of the project are shown on Exhibit B, Index Map and on Exhibit C-1, Pre-Mining Map. A Gravel Well Permit and Temporary Substitute Supply Plan will be submitted to the Colorado State Engineer for approval. A portion of the permit area is located within the 100-year floodplain of the South Platte River and a Floodplain Permit will be submitted to Adams County for approval. Mining will be by the "dry-mining" method, pumping alluvial groundwater from within the area to be mined. A slurry trench that will be constructed around the perimeter of the property will confine the groundwater within the mining area and there will be no impact to surrounding well owners. Mining will expose approximately 32.5 surface acres. Surface Water The nearest major watercourse is the South Platte River, which flows along the western edge of the permit boundary. Final discharge from de-watering the excavation areas of the permit site will be made to the South Platte River. The Operator has obtained a CPDS Permit (No. CO- 0038512) that covers discharge related to the project. The approved permit can be found in Appendix 1. Groundwater Wells located within 600-feet of the permit boundary for the site are shown in the table included in this exhibit. The wells listed as being within 600-feet of the permit boundary are a mix of both alluvial and bedrock wells. It is believed that some of these wells may be the primary source of domestic drinking water. The Applicant will begin a baseline monitoring program of groundwater depths/elevations in the area before mining and will continue monitoring during de-watering operations. Groundwater monitoring will continue for the duration of the operation and records will be maintained by the Applicant. The Applicant agrees to notify any well owner of significant groundwater drops due to mining that may affect the performance of that well. The intent is to notify the neighbor in advance of a potential problem and begin working together on a mitigation solution at the earliest possible time. The Applicant will attempt to mitigate the potential temporary effects of the de-watering operations on the subject well by using reasonable and cost~ffective methods. Mitigation techniques may include the construction of a recharge ditch for conveying water to the affected area, trucking in water, or possibly deepening a shallow well to utilize the full saturated thickness of the aqu'Ifer. srepecoacb Mine-Repuler 112 Permit 07045 Moblb Prem6c (:onaeM Inc 14 November, 2001