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mining permit M- 2000 -041, Evans #2 Pit. Recommendations provided here define monitoring <br />procedures and methods to be used during mine operations and reclamation activities at the <br />Evans #2 Pit to ensure monitoring data is accurate and representative of actual field conditions. <br />Based upon preliminary assessment of the site hydrogeologic characteristics, the monitoring plan <br />should include the installation of new alluvial wells or, if constructed appropriately, existing <br />alluvial wells. The monitoring wells shall penetrate the entire alluvial aquifer. The screened <br />interval and surrounding filter pack shall allow for seasonal groundwater fluctuations and enable <br />accurate depth to water data collection. The surface seal around the well shall be made of <br />bentonite or other impermeable material that prevents surface water from directly draining to the <br />well or filter pack. Wells to be included in the monitoring plan shall be surveyed to provide well <br />coordinates and top of casing elevations (measuring point elevations) so that groundwater <br />elevations can be used for potential groundwater impact evaluations. <br />Approximate locations for alluvial wells to be included in the monitoring plan are illustrated on <br />Figure 7. Locations identified in the figure are approximate, and actual monitoring well <br />locations may vary depending upon the potential inclusion of existing wells and property use <br />restrictions. It is assumed that permission can be obtained from landowners to locate wells <br />outside the permit boundary. Two wells should be placed east of the mining activities within the <br />estimated dewatering radius of influence for Phase I and Phase III mining. An additional <br />monitoring well should be located north of the mining area to evaluate dewatering affects near <br />the alluvial aquifer boundary. Two wells placed northwest of the mine pits will provide <br />information on the influences from backfilling and other drawdown obstructions caused by <br />reclamation activities. Dewatering impacts are not anticipated south of the river and, therefore, <br />wells between the mining operations and the Arkansas River, or wells south of the river, are not <br />proposed. <br />Five wells in the locations described are recommended as a minimum for inclusion in the <br />groundwater monitoring plan to evaluate general dewatering impacts. At the owner's discretion, <br />extra wells may be added to the monitoring plan to evaluate the affects of dewatering on specific <br />mining, reclamation, or other aspects of property development. Additionally, wells may be <br />added to the monitoring plan to specifically evaluate pre - existing or anticipated dewatering <br />issues on adjacent properties. <br />Elue eor -th Page 10 of 11 <br />SOLUTIONS <br />