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Sealing of Monitoring Wells <br />When monitoring wells are no longer required, they will be sealed in accordance with Section 4.07. Any <br />monitoring well that is to be mined - through will be sealed in accordance with Section 4.07 prier to <br />mining through the well. <br />Backfilling and Grading <br />The next step in the reclamation plan involves the backfilling of the portal areas, as well as other facility <br />areas requiring backfill. Areas requiring backfill are identified on Table 63, Overburden Redistribution. <br />Comparison of existing topography with the topography to be achieved after reclamation was used to <br />generate all volumes included in the Table. The final topography for the areas listed on Table 63, <br />Overburden Redistribution, is shown by the Reclamation Plan Map (Map 29). Following backfilling, all <br />backfilled areas will be graded. The various backfilled areas will be rough - graded to the approximate <br />contours shown on the Reclamation Plan Map (Map 29). Post - disturbance cross- sections for the various <br />disturbed areas are presented in Exhibit 20, Post - Disturbance Cross - Sections. <br />Redistribution of Topsoil <br />The next step in the reclamation plan will be the redistribution of topsoil or plant - growth media, The <br />topsoil, where available, or best - available plant- growth media will be redistributed by scrapers or small <br />end -dump trucks and spread with dozers or graders. Care will be taken to keep all unnecessary equipment <br />off the redistributed topsoil. The roughened condition of the backfilled material will enhance the stability <br />and reduce the potential for slippage of topsoil or plant - growth media. <br />Many of the disturbed areas associated with BTU EC's operations were previously disturbed by past <br />mining operations. These operations occurred prior to implementation of today's existing reclamation <br />regulations. As such, no topsoil was salvaged. BTU EC, in cooperation with the CDMG /CDRMS has <br />performed sampling programs for some of these areas to determine the best- available plant - growth media. <br />Results of the sampling program are presented in Exhibit 41, Overburden Analysis - SA Portal Area. In <br />these instances, the best - available plant - growth media will be used to compensate for the deficiency of <br />salvaged topsoil. <br />Revegetation to Appropriate Land -Use <br />The final step in the reclamation plan will be revegetation of disturbed areas to an appropriate postmining <br />land -use. Seeding and mulching will occur in the spring or fall of the year, depending on ground <br />conditions. Mulch will be secured by crimping or tacking. Each area will be seeded with the appropriate <br />seed mixture for its designated postmining land -use. There are three postmining land uses proposed for <br />the BTU EC mine site; 1) Rangeland /Wildlife; 2) Cropland; and 3) Pastureland (hayland). The specific <br />seed mixtures proposed for the noted postmining land -uses are presented on the following tables: <br />® Table 64, Seed Mixture - Rangeland/Wildlife <br />® Table 65, Seed Mixture - Cropland <br />e Table 66, Seed Mixture - Pastureland ( hayland) <br />807_34 <br />