REV01772 - Laserfiche WebLink

Home Browse Search

Technical Revision No. 79 (Second Response) May 5, 1997 Page 4 Figures 2.0, 2.1 and 2.2 should be added to Appendix L. Information for Exhibit 66 previously provided to the Division in MCC's last response should be moved to Appendix L. It is MCC's intention to include all design information regazding the pond at the North Soil Storage Area in Appendix L. 46. MCC has done further investigation of the springs located by HLA during their reconnaissance of the RPE site. All springs located by HLA had been previously located by MCC and are monitored as part of our hydrologic monitoring program. Figure J-1, Geologic Map, has been revised to include the names of these springs. Spring G-20 has been monitored continuously since 1979 and flow data can be found in the Annual Hydrology Reports. Monitoring of springs E15-1 and E15-2 began in May 1996 and the monitoring ofE15-3 began in December 1995. As this information will be included in the 1996 AHR, not yet submitted to the Division, MCC has included a copy of the flow and Geld parameters gathered until September 1996. As you will note, the total flow of all springs is well within the worst case spring contributions used by MCC and HLA in the design of the underdrains. 47. Please find enclosed a revised stream buffer zone map. The map has been replotted at a 1" = 150' scale and the stream buffer has been shaded to more clearly show the area within 100 feet of Sylvester Gulch and the North Fork of the Gunnison River. 48. Although the USGS monitoring station on the North Fork has not been surveyed to determine its exact location, field observations indicate that the gauging station is slightly upstream of the eastern boundary of the RPE and well upstream of the NPDES discharge point for the RPE sedimentation pond. Therefore, the upstream monitoring station on the North Fork will continue to be suitable for monitoring potential impact from MCC's operation. Criteria for Review of Permit Application for Permit Approval or Denial (2.07.6) 49. MCC does not believe a stipulation is necessary as MCC committed in our previous response to providing the CDOT approval as soon as it is received. MCC understands that construction cannot begin until this approval is received. Maps and Plans (2.10) 50. As appropriate, MCC will show township, range, and section information on future maps as they aze revised.