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• Draws, and in the main channels of Tuttle and Calamity Draws. Monitoring instrumentation, <br />parameters, and monitoring frequencies are described in detail in Tab 15, Hydrologic Monitoring <br />Program. The Surface Water Monitoring Plan employed to monitor the extent and magnitude of any <br />mining impacts is discussed in Tab 18, Hydrologic Reclamation Plan. <br />The surface water monitors will be maintained for the life of the mining operation or until such a time <br />as CMLRD may agree that they are no longer necessary. All surface water monitoring installations <br />will be removed upon completion of the postmining phase of the Hydrologic Monitoring Program. <br />All surface water data collected at each monitoring site in each future water year will be compiled <br />and submitted to the CMLRD in the form of the Nucla Annual Hydrology Report (AHR) within three <br />months after the end of each water year. Future AHRs will include copies of quarterly NPDES <br />discharge monitoring reports for each NPDES monitoring site submitted to the Colorado Department <br />of Health during the same water year. <br />Introducton. Analyses and programs integral to the Water Rights Plan are presented in several <br />sections of the permit. A review of these sections is appropriate. Pit inflow volumes and pit <br />• pumpage drawdown projections are discussed in detail and presented in Tab 17, Probable <br />Hydrologic Consequences. Calculations for the impacts of mining discharges on downstream water <br />quality and the shallow ground water quality for water use considerations are also presented in Tab <br />17, Probable Hydrologic Consequences. Specific ground and surface water monitors for the purpose <br />of verifying drawdowns and changes related to water rights in streamflow volumes are proposed and <br />discussed in Tab 15, Hydrologic Monitoring Program. Finally, the detailed water rights plan which <br />integrates the above-referenced information is presented in Attachment 16-1 to this Tab. <br />Water Rights Protection and Mitigation Plan. The following discussion briefly summarizes the <br />approach to the water rights plan. All ground and surface water rights within a reasonable distance <br />of the Nucla Mine were documented. Pit inflow and pit pumpage drawdown analyses were <br />performed and tabulated. Drawdowns and pit bottom elevations were compared against water <br />righted well production zone elevations to determine which, if any wells, could potentially be <br />impacted by the mining induced drawdowns. Similarly, surface water rights within the one-foot <br />drawdown contours were identified as those surface water rights which could potentially be impacted <br />by the mining induced drawdowns. Drawdown depletion rates were then estimated at the different <br />surface water right locations and replacement rates were determined for each. <br />Calculations were performed to estimate industrial uses of surface water by Peabody and <br />evaporative losses from the six sediment ponds receiving runoff from the mining areas. An <br />• <br />16-6 <br />