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<br />Page 2.05 -109, second to last pazagraph on Dove Cave: Please add a statement similar <br />to, "If after a two yeaz period, the support timbers appeaz to be taking on load, thereby <br />providing the primary support for the overhang, Bowie will consult with the USFS in <br />order to determine future action and long term support. In addition, if the timber supports <br />do not appear to be functioning properly, Bowie will contact USFS representatives <br />immediately to determine necessary steps to minimize resource damage." <br />During our February 13, 2007, meeting with Bowie, the State Engineer's Office, and DRMS <br />several ideas were discussed with respect to the Bruce Pazk Dam and adjacent landslide feature. <br />We wanted to make sure several items were brought forwazd and included within the permit <br />revision: <br />• Attenuation information collected from the West Elk Mine's direct impact of their <br />seismometer should be analyzed and incorporated into Bowie's seisrnic modeling. <br />It is our wish that once mining occurs in close proximity to station FGH, Bowie collects <br />data relative to size of event recorded and distance from the event, and subsequently <br />analyzes the data and summarizes the results in an addendum to their mine permit. These <br />data should be compared to the information from the West Elk Mine, and any changes in <br />the model related to the Bruce Pazk Dam and landslide should be outlined. <br />• Through PR-10, a threshold acceleration (e.g. alarm limit) should be set on seismic <br />activity at the Bowie #2 mine. If and when this threshold is exceeded, it should initiate a <br />physical inspection of the Bruce Park Dam and reservoir. The USFS defers to the State <br />Engineer's office to determine an appropriate acceleration threshold. <br />Again, thank you for the opportunity to comment. If you have any questions, please contact <br />Ryan Taylor of my minerals staff at 970-527-4131, or via email at rztaylor(u,fs.fed.us . <br />Sincerely, <br />~, %~~~ <br />LEVI K. BR6IYX,ES <br />District Ranger <br />cc: Jim Stover <br />