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requirement of SCC to account Tor water used for mining-related purposes. Also, any releases <br />• of water that will be required in the future to replace "out-of-priority" depletions caused by <br />SCC 's water usage must also be accounted for. A discussion of SCC's water rights and the <br />approved plan for augmentation is contained in Tab 16, Protection of the Hydrologic Balance. <br />Appendix 16-1 of Tab 16 presents a summary of monitoring required by the Colorado State <br />Engineer's Office (Division of Natural Resources) to ensure SCC's compliance with the <br />approved plan for augmentation. <br />1991 Surface Water Monitoring Program. The current monitoring program is contained in <br />Appendix 15-3. Upon approval of Permit Revision Number 1 IPR11 in October, 1991, Peabody <br />incorporated the monitoring program detailed in Appendix 15-3. This revision basically added <br />two surface water sites and changed some monitoring frequencies. <br />Permit Renewal Z (November, 19951 modified the ground water monitoring program. No <br />changes were made to the surface water monitoring program. <br />Monitoring at five spring sites will continue on a semi-annual basis for field parameters and <br />according to the surface water parameter long list. Spoil springs will be incorporated into the <br />ongoing spring monitoring program as they develop. SCC will conduct a survey each year <br />following the snowmelt and record the locations of all spoil springs with discharges of at least <br />• 5 GPM. Locations will be reported to the Division in the next successive AHR. During high <br />flow season, monthly field parameters will be measured and one full suite laboratory sample <br />will be collected at spoil springs. During the low flow season, field parameters will be <br />measured once, and one full suite laboratory analysis will be conducted. <br />Current Surface Water Monitoring Program. The current monitoring program (Appendix 15-4) <br />was instituted upon the approval of Permit Revision Number 2 111-W South Expansion, <br />submitted 19981. The details of changes made to the monitoring program may be found in the <br />introduction to Appendix 15-4. <br />NPDES MOnITOring. Six NPDES sites will eventually be established at the Seneca II-W Mine, <br />and monitoring at these sites will be conducted in accordance with the requirements <br /> <br />g Revised 9/98 <br />