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102 Considerations for feasibility and permitting <br />*a <br />• Bedrock groundwater — Continue monthly water level measurements and <br />quarterly groundwater sampling. <br />• Piezometers — Monthly water level measurements. <br />C� <br />• <br />8.2.3 Water quality data evaluation <br />Data collected during the pre - feasibility study should be evaluated more rigorously once <br />a larger data set is available to. characterize seasonal variation in water quality and flow. <br />It is important to do a thorough job on this aspect of the mine permit application, as this <br />will be the baseline data set that all potential impacts will be judged against. <br />Historic data available from the Collom area have been incorporated into the <br />pre - feasibility report. However, these data has not been rigorously checked for quality <br />control. <br />8.2.4 Alluvial valley fills <br />A summary of existing information relevant to AVFs is provided in Section 4 of this <br />report. It is likely that additional evaluations will be needed to update the existing AVF <br />information and to support the permitting documents. <br />8.2.5 Mine closure and reclamation <br />Hydrologic aspects of mine closure and reclamation need to be evaluated for the permit. <br />This includes the re- saturation behavior of the backfilled pits, water quality, potential <br />spoil seeps down - gradient of the pits and long -term effects on surface water drainages. <br />2572 -R2 Colowyo Coal Company <br />Water Management Consultants <br />