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Subsidence Handbook Volume III, Exhibit 15 <br />GROUNDWATER • <br />Introduction <br />Groundwater within the Mesaverde formation has been found to be of loav quality, and <br />limited extent, occurring only as isolated perched water bearing zones. These zones are <br />not currently exploited and, because of their limited extent, have no potential for future <br />development. <br />Worst Case Damage <br />Disruption of perched water bearing zones will occur due to mining where they lie in the <br />immediate vicinity of the mine roof. Because of the nature of this groundwater, this does <br />not constitute any effect on groundwater resources. <br />Pre-Damage Monitoring <br />Bowie Resources will monitor mine inflows. The localized perched zones typically drain <br />quickly and are of very low flows. This information will be presented in the "Annual • <br />Subsidence and Hydrology Report". <br />Post-Damage Monitorinq <br />Post-damage monitoring will be conducted like the pre-damage monitoring. <br />Mining Techniques <br />Longwall or conventional room-and-pillar mining with pillar extraction will be used <br />throughout the permit area. This will affect the local perched water bearing zone, but will <br />have no effect on water utilization. <br />Repair Procedure <br />The local perched water-bearing zones would be disrupted, but are limited in extent and <br />are not put to beneficial use. No effect on area water utilization is anticipated. <br />• <br />PR-04 38 10/00 <br />