2015-11-24_REVISION - C1981008 (3)

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a' Mr. Brock Bowles November 13, 2015 Page 3 and repaired. Rule 4.15.7(5)(a) allows for up to 5% of the acreage initially revegetated during any one year to be repaired without reinitiating the liability clock. Response: Mr. Frank Ferris presented a plan to stabilize the rills to Mr. Brock Bowles on November 11, 2015. Mr. Bowles provided verbal agreement with the plan presented. It was also conveyed to Mr. Bowles that WFC would be submitting a revision to the permit to address the plan presented to Mr. Bowles in the near future. 5. Please update the SEDCAD demonstration that was submitted in the SL -15 application to address the disturbances created by the pothole and rill/gully repairs. Response: Please note that a SEDCAD demonstration was not submitted with the SL -15 application nor is it required. As required by Rules 3.03.1(3)(b) and 4.15.1(2)(b),a sedimentology demonstration was included in the SL -15 application, and the methodology utilized was the Revised Universal Soil Loss Equation or RUSLE. RUSLE does not address the entire watershed area as does SEDCAD; rather it utilizes randomly picked length and slope factors locations as shown on Map 1 and Appendix B in the SL - 15 application. Even with the minimal repair work that will occur from the pothole repair, it will not change the results of the sedimentology demonstration presented in Appendix B in the Phase II application. The areas that will be repaired are all small in aerial extent and will revegetate quickly through irrigation, and any surface runoff that may occur will have more than adequate vegetation directly adjacent to the repaired areas. The adjacent areas will mitigate any surface runoff that may occur between the point when the repairs are finalized and the seed germinating. Therefore, the sedimentology demonstration presented in Appendix B has not been modified as requested. Tri-State would like to notify the Division of an error contained within the SL -15 application as it was submitted on July 15, 2015. The SLA 5 application noted that Tri-State on behalf of the New Horizon Mine, was applying for 77.4 acres of irrigated pasture and dryland reclamation unit. The correct acreage that should have been applied for under SL -15 is 112.3 acres of irrigated pasture and dryland reclamation units. Map 1, as submitted, delineates the proper areas that do total 112.3 acres. Tri-State would like to request that the Division notes and revises the acres applied for accordingly. AN EQUAL OPPORTUNITY /AFFIRMATIVE ACTION EMPLOYER A Touchstone Energy* Cooperative