2002-04-10_REVISION - M1983067 - Laserfiche WebLink

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Apri19, 2002 Page 4 a) Evaporation - 12.8 acre-feet per year b) Mining (dust control, retained in product, reclamation) - 16.7 acre-feet per year c) Reclamation -included within mining amount 2) The source of the water for the above uses will be a well drilled in the northwest portion of the property. Replacement water for the well will come from leases with Consolidated Mutual Water Company and the City of Greeley. 12) As of the date of this letter, Lafarge has been in the process of monitoring the groundwater levels in a total of 6 wells. Four of these wells are located along the eastern edge of our property; one well is south of the planned operation (on Mr. Robert Cutler's property); and one well is on southwestern side of the property (Mr. Ron Lindgren's property). In addition, Lafarge has committed to begin monitoring a well located on Mr. Kenneth Bromley's property to the north of the planned operation and to drill an additional well on the east side of Old Brighton Road. a) If necessary, we can install a "french-drain" system up gradient of the slurry wall approximately one foot above the highest level of the water table level as determined by our monitoring data. This system will automatically direct any mounded water around the property and back into the natural flow toward the South Platte River. This pro-active system will ensure that the groundwater table doesn't "mound" in any appreciable manner and cause damage to any of the surrounding structures and/or neighbors. b) A revised Exhibit D -Mining Plan Map is attached and contains the locations of all of the monitoring wells, existing and proposed. c) We are cun•ently collecting groundwater data on a monthly basis. We will continue to collect this data on a monthly basis for the duration of the project, d) We will submit the monthly monitoring-well data with our annual report to the DMG. e) As of the date of this letter, we have collected 4 months of groundwater data.