2016-11-23_GENERAL DOCUMENTS - C1981041

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incorporated into the applicant's permit with the approval of TR -68. Based on the observation made during the inspection, the area is stable with some vegetation established and no erosion features were observed. The area is being used as a storage area for the Kokopelli Farm fruit stand. In accordance with Rule 3.02.3(2)(c), it appears the approved post -mine land use for this parcel has substantially commenced and is likely to be achieved. Hydrology - Suspended Solids Demonstration Rule 4.05.2 states that sedimentation ponds and other treatment facilities for surface drainage from the disturbed area shall be maintained until removal is authorized by the Division and the disturbed area has been revegetated and stabilized, the untreated drainage from the disturbed area ceases to contribute additional suspended solids above natural conditions, and the quality of untreated drainage from the disturbed area meets the State and Federal water quality standard requirements applicable after the sedimentation ponds and treatment facilities are removed, if any, for receiving streams. Snowcap Coal Company has demonstrated that the untreated drainage from the South Portal (Roadside Refuse Disposal and Borrow Areas), North Portal, CRDA-1 and 2, and from the North Decline disturbed areas will contribute fewer suspended solids to streamflow or runoff outside the permit area than untreated drainage from the natural surrounding premising area. This was accomplished by a soil loss comparison between these disturbed locations and corresponding non -disturbed reference areas using the Universal Soil Loss Equation. SCC also provided an appropriate demonstration that the quality of untreated drainage from these disturbed areas meets the State and Federal water quality standard requirements applicable after the sedimentation ponds and treatment facilities are removed, if any, for receiving streams. All of the sediment ponds requested for bond release with SL -09 have met the requirements for removal, and demonstrations supporting their removal have been incorporated into the permit in Appendix 14-12 and 14-13 of the Roadside Mine Permit with Permit Revision No. 5 and Technical Revision No. 61. SCC provided a soil loss demonstration in Tab 9 of the SL -09 bond release application for the bond release areas, with the exception of Pond 8 (Area #7) as vegetation establishment is not required for this area due to its approved industrial/commercial post -mine land use. The demonstration utilizes the Universal Soil Loss Equation (LISLE) to demonstrate the reclaimed parcels do not contribute suspended solids to the stream flow or runoff outside the permit area in excess of adjacent un -affected areas. SCC submitted small subset figure maps of the bond release areas. For each area evaluated, transects were drawn within the bond release areas and adjacent undisturbed areas. SCC used the information drawn from these transects, such as slope length and the vegetation cover data, along with regional climate information to obtain the variables to input into the USLE. These variables were plugged into the USLE to ascertain the soil loss in tons/acre/year for each parcel and their respective un -affected reclaimed area. For each area evaluated, the reclaimed area was demonstrated to lose less sediment per year than the adjacent undisturbed area (Tab 9 of the SL -09 application). The Division reviewed the variables used to make this demonstration and the results and found them to be adequate. All of the bond release areas were observed during the October 6, 2016 bond release inspection. The bond release areas were stable and erosional features were not observed. Based on the demonstration submitted with the SL -09 application and the observations made during the G 1981-041, SL -09 Findings Document Page 10 of 79