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77+00. The proposed design has the West Pit Ditch intercepting the Taylor Tributary <br />Ditch at approximately station 79+00. <br />Based on the Division's review of the materials provided by Colowyo and following the <br />general discussion of the proposed changes in Technical Revision 83 provided above, the <br />Division has the following completeness questions. <br />Rule 2.10 - Mans <br />Colowyo has provided a revised copy of Map 41 - Watershed Boundaries for <br />Hydrologic Modeling, which shows the locations of the proposed post-mining <br />drainage channels. One of the items shown on this map is the "Reclamation <br />Boundary", which is reclamation work completed at the site. This boundary, <br />however, was last updated in December 2006. Since December 2006 there have <br />been several hundred acres reclaimed at the site. This information is important <br />and necessary in reviewing the mine site hydrology. Please update Map 41 to <br />include the most recent "Reclamation Boundary" information available. This <br />information should contain all of the reclamation completed through October <br />2009. Please submit three copies of Map 41 that have been signed by a registered <br />professional engineer to the Division for review. <br />2. Several of the permanent post-mining channels shown on Map 41 - Watershed <br />Boundaries for Hydrologic Modeling, have the actual beginning station shown on <br />the map (for example, the Prospect ditch shows the beginning station as 37+92). <br />This information is helpful in reviewing the ditch design information. The <br />Division requests that Colowyo include this information for all ditches shown on <br />Map 41. Although this is not a completeness issue, since Map 41 will need to be <br />changed and resubmitted as a result of question 1 above, this would be a good <br />time to include the ditch starting point information as well. <br />3. Colowyo has proposed changes to the approved post-mining topography for the <br />West Pit area and has provided Map 19 - Post-Mining Topography-South Area <br />and Map 20 - Pre-Mining and Post-Mining Cross Sections A-A', B-B', C-C' & <br />D-D'. Colowyo has not, however, included Map 20A, which shows pre-mining <br />and post-mining cross-section E-E'. Please submit three copies of Map 20A that <br />have been signed by a registered professional engineer to the Division for review. <br />4. Colowyo has proposed changes to the approved post-mining topography for the <br />West Pit and has also submitted copies of Map 19B - Post-Mining Topography- <br />South Taylor Area. This map includes some overlap areas of the West Pit since <br />they have apparently been changed. Colowyo did not, however, submit copies of <br />Map 20B, which shows pre-mining and post-mining cross-sections for the South <br />Taylor Area, as depicted on Map 19B. Please submit three copies of Map 20B <br />that have been signed by a registered professional engineer to the Division for <br />review.