Laserfiche WebLink
Rule 3.02.2 - Determination of Bond Amount <br />4. In the cover letter Colowyo states they "...recognize that this revision will <br />result in a change to bond calculations, but would like this change to be reviewed <br />prior to making any permanent alterations to the bond information." The Division <br />agrees that there will be a change to the bond as a result of this revision and that the <br />best time to complete this change will be at the end of the technical adequacy <br />review. Given the fluid nature of the review process, recalculating the bond at every <br />step leads to extra work. That said, once all technical adequacy issues have been <br />addressed, Colowyo will need to recalculate and resubmit their reclamation <br />cost estimate for the fills, associated overburden stockpiles and backfilling <br />and grading of the South Taylor Pit. The updated cost estimate will be a part <br />of Technical Revision 81. Colowyo will need to update Exhibits 13 and 13A <br />with new costs and volumes and all associated cost estimate maps and <br />submit them to the Division for its review. <br />Response: We agree that a revision to the current bond will be required as part of <br />this change, and some preliminary work is underway. We understand that if this is <br />done in a timely manner, additional reclamation bond calculations will not need to be <br />updated during the mid-term review. Bond materials will be provided at a later date. <br />Rule 4.05.4 - Stream Channel Reconstruction <br />5. In the cover letter Colowyo states that Technical Revision 81 includes the <br />West Taylor West Tributary Ditch, the West Taylor East Tributary Ditch, the East <br />Taylor West Tributary Ditch and the East Taylor East Tributary Ditch. Each of these <br />ditches has been extended in length, from 200 feet (East Taylor East Tributary <br />Ditch) to 900 feet (East Taylor West Tributary Ditch). Colowyo has not, however, <br />updated any of the general information regarding these ditches that is contained in <br />Exhibit 7, Item 20, Part E - Permanent Channel Design. Please update this <br />general information, including ditch length, average slope, peak flow and <br />design information (bottom width, depth, side slopes, etc.). Please submit the <br />new information in Exhibit 7, Item 20, Part E for the Division's review. <br />Response: Exhibit 7, Item 20, Part E has been modified with this submittal to <br />provide the requested information. <br />6. In conjunction with question 5 above, Colowyo has not provided any <br />SEDCAD hydrologic modeling for the four ditch segments that have been changed <br />as a part of Technical Revision 81. Please refer, for example, to the modeling of the <br />Buckskin Draw Ditch, which is contained in Appendix Exhibit 7-14M, updated with <br />TR-63 on 25 July 2009. Please submit the SEDCAD modeling for the four <br />revised post-mining ditches for the Division's Review. <br />Response: Exhibit 7, Item 20, Part E includes the requested modeling.