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Summary of Adequacy Review for TR-105 Mine: West Elk Date review completed: 3/15/06 Permit No.: C-SO-007 DMG reviewer: Tom I{aldenbaeh Require- ments Requirements complied Comment with 7 (yes I no Right of entry yes The operator owns the land. (2.03.6) Cultural resources The proposed work will be within an area previously approved for mine (2.04.4) Yes disturbance in TR-79 (see attached map). Cultural resources cleazance was obtained in TR-79. Fish/wildlife information (2.04.10, The proposed work will be within an area previously approved for mining 2.04.11, 2.05.6(2) yeS disturbance in TR-79. Fish and wildlife cleazance was obtained in TR-79. and 4.18 Maps and plans Yes The submittal includes a PE-certified map. 2.10 Topsoil (4.06) and The proposed work will be within an area previously approved for mine topsoil markers disturbance in TR-79. The plan for topsoil salvage for the area was appoved 4.02.7 in TR-79. Runoff from the distubance proposed in TR-105 and runoff from undisturbed areas uphill from the disturbance will be routed through the two- cell RPE pond via the temporary RPE ditch. A SEDCAD run in the Water quality submittal indicates the pond will have 1.8 acre-feet of excess capacity with protection (4.05.2) yes the addition of cleaz water diversion ditch DCW-Schas adequate capacity to treat the runoff Runoff from the disturbed area can be expected to be alkaline with quality similar to pre-disturbance conditions. The runoff can be expected to be too alkaline to form leachates or to mobilize metals in the soils. Ditches are sized to handle a 100-yeaz storm. Clean water ditch DCW-8A will divert undisturbed azea runoffto Sylvester Gulch that originates from Small diversions undisturbed areas immediately west and southwest of the disturbed area. (4.05.3) Ditch design capacities were checked with the Manning equation (see attached spreadsheet). Riprap sizes appeared adequate based on The SEDCAD runs in the ditch designs used reasonable variables and azameters. Sediment control The SEDCAD run in the submittal that verified the RPE pond capacity 4.05.5 yeS used reasonable variables and arameters. Reclamation plan (2.05.4),backfilling/gr The submittal contains a plan to remove structures, backfill, regrade, and ading (4.14), yeS seed. reve etation (4.15) Page 3 of the submittal provides for grouting aquifers in the vent shaft that Permanent sealing are not adequately protected by the concrete lining. Pages 4 and 9 of the (4.07.3) yes submittal provide for permanent capping of the RPE shaft with a concrete and steel structure. Page 11 provides the plugging plan for the two drill holes. The proposed shaft and drill holes will be constructed on the hillslope Coal mine waste immediately upslope from the refuse pile. The shaft and drill holes will have banks (2.05.3(8) and yes no impact on the structural stability of the refuse pile because the shaft and 4.10) drill holes will not increase surface runoff or underground seepage in the refuse ile. Bond amount (3.02.2) yes DMG estimates reclamation costs of $19,242 (see attached estimate).