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MINING PLAN <br />It is important to have several options for sediment control from the processing of <br />the gravels. This plan includes three very different methods that Transit Mix of Pueblo <br />could use, either singly or in combination. The operator will use which ever method is <br />most appropriate and which produces discharge water that is within NPDES permit <br />standards. <br />Slurry Wall Construction <br />The slurry wall to be used in this operation will not be installed until the end of <br />Phase 1. In essence, the slurry wall is a reclamation action rather than a mining action. <br />Therefore, description and details of the slurry wall construction will be found in the <br />Reclamation Plan (Exhibit E). <br />This approach is unconventional. On most sites where a slurry wall is used, the <br />wall is installed before much if any mining is actually done. Due to the layout of this site <br />and the reclamation plan and the need to dispose of a comparatively large amount of <br />overburden early in the mining process, installing a slurry wall prior to mining does not <br />maximize utilization of the resource and does not allow for implementation of some of the <br />features of the reclamation plan. The latter is particularly true on the south side of the <br />Phase 1 area. <br />Because of the proximity of this site to the river corridor and to maximize the <br />blending of this site into the river corridor environment, disposing of the backfill into the <br />southern portions of the mining area allows for the best reclamation. If a slurry wall was <br />installed across this area and outside the area to be mined, blending of the site <br />reclamation into the river corridor habitat would not be possible. Furthermore, disposal of <br />overburden produced during the mining of the site could not be utilized and the <br />overburden would need to be hauled elsewhere for disposal. By disposing the overburden <br />on-site and utilizing that overburden as a reclamation resource, that resource is not lost <br />or wasted elsewhere. <br />Processing and Distribution of Products <br />All processing and stockpiling of the aggregates will occur at the Plant Site shown <br />in Exhibits C•3 and C-4. Processing includes crushing, screening, and washing of the <br />aggregates. The plant will be a permanent installation that will serve this site throughout <br />its life. Even when the operation expands further to the east, it is very likely the <br />Pueblo East Pit Amendment Exhibit D Page 10 <br />