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<br />9 Ms. Christine Johnston <br />Mountain Coal Company <br />Page 2 <br />May 9, 1997 <br />2.05.3 Operation Plan -Permit Area <br />2.05.3 4 Ponds. imooundments and diversions. <br />13. Response accepted. <br />15. The MCC response is accepted; however, we aze concerned that the ditch rip rap may be <br />undersized. It is our understanding that the ditch and rip rap designs aze included with <br />Exhibit 70, and that the designs are certified by a professional engineer. Please notify us <br />if this understanding is not correct. The ditches will be monitored in the field, and <br />compliance will be evaluated based upon ditch performance. <br />2.05.3(8) Coal Mine Waste And Non-Coal Processing Waste. <br />24. Since MCC has declined to provide the division with chosen specifications for the <br />installation of 30-mil PVC liner beneath the RPE and the 60-mil HDPE liner in the <br />sediment pond, the Division will expect the liners to be installed in accordance with the <br />manufacturer's standard specifications. <br />25. Response accepted. <br />28. Response accepted. Sce Item No. 2. above concerning installation of additional <br />piezometers. <br />30. MCC's response has satisfied the Division's earlier concern. <br />33. Response accepted. <br />2.05.4 Reclamation Plan. <br />38. Response accepted. <br />40. Response accepted. <br />2.05.6 Mitigation of the Impacts of Mining Oaerations. <br />2.05.6(3) Protection of hydrologic balance. <br />44. Response accepted. See Item No. 2 above concerning installation of additional <br />piezometers. <br />