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• Finally, based on geomorphic criteria alone, neither Tuttle or Calamity Draws meet the necessary <br />criteria to be identified as alluvial valley floors, as they display geomorphic features that are <br />indicative of upland areas rather than alluvial valley floors. <br />Hydrology Monitoring Plan <br />When Western Fuels-Cobrado (WFC) purchased the-Nucla Mine (now the New Horizon Mine) <br />from Peabody Coal Company in April, 1992, there was (and is) existing mining permit C-81-008 <br />covering the property. WFC will continue to operate under that permit. <br />W FC has developed a new hydrological monitoring program with the advice and consent of CDMG. <br />The monitoring program is described in detail in Section 2.04.7. <br />Bl PROBABLE HYDROLOGIC CONSEQUENCES <br />In support of its original application to mine the Nucla and Nucla East properties (now the New <br />Horizon 1 and New Horizon 2 mining areas), Peabody Coal Company performed extensive and <br />detailed computer modeling to determine probable hydrologic consequences of mining. Details of <br />~ the computer modeling are available in Attachment 2.05.6(3)-2 (formerly Peabody Tab 17 ). <br />• <br />This discussion incorporates water monitoring results through the spring of 2001, which have been <br />valuable in predicting long term probable hydrologic consequences. <br />Peabody summarized the discussion in Attachment 2.05.6(3)-2 (formerly Peabody Tab 17) by <br />listing the probable hydrologic consequences and the results of the analysis of each impact. This <br />summary is presented as Table 2.05.6(3)-1 on the following pages. The table has been modified <br />to incorporate new findings with both the New Horizon #1 and #2 mines. As can be seen, all of the <br />probable impacts have been determined to have no short or long term significance or a plan has <br />been presented to mitigate those determined to have some significance. <br />Following the summary table is a detailed discussion of each of the potential impacts to the <br />hydrologic balance. <br />• <br />REVISED MARCH 2006 2.05.6(3)-16 <br />