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<br />• Res og nse: As noted in the previous response, Rockcastle, after <br />reviewing all relevant considerations, proposes to remove and reclaim <br />the Pond 2 disturbance area. Therefore, no further response is <br />necessary. <br />6) As previously discussed, and as contemplated in the Agreement (N, 3), the <br />roads leading to these pits must be configured to a relatively maintenance <br />free condition. This will include removal of culverts, to be replaced by <br />riprapped low water crossings, and/or culvert designs which verify safe <br />passage of the projected 10-~~ear, 24-hour peak flows. Also, all existing <br />culverts must be maintained. <br />Response: The Agreement does not specify requirements for <br />postmining road drainage structures. However, in order to provide for <br />effective long-term drainage and maintenance free operation, <br />• Rockcastle plans to remove all existing culverts and replace them with <br />riprapped crossings on those roads which branch off the main access <br />road and provide access to individual pit areas (ie: The Pit 4 access <br />road, Pits 2/3 access road, Pit 1 access road, main access road <br />beyond the entrance to Pit 6, and the Pit 5 access road). <br />Given the limited information on existing culvert installations, full design <br />review is not feasible. Rockcastle, therefore proposes the following <br />approach to address all existing culverts on the designated access <br />roads and provide for effective long-term drainage: <br />• During final site reclamation/remediation/closure activities, <br />the field supervisor will travel the designated access roads <br />and identity all existing culvert installations; <br />• At each culvert location, the existing culvert will be <br />. excavated and. removed; <br />-13- <br />