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Rule 6.4.4 Exhibit D- Mining Plan 8. Exhibit C-ldepicts a haul road and a river crossing over the Big Thompson River. The applicant states that materials will be processed at the adjacent Brownwood Pit processing area operated by Coulson Excavating Company (Permit Number m-1979-059). The Division could find no indication in the Brownwood Pit permit file that the haul road and river crossing have been permitted. Coulson Excavating Company will need to file a revision to the Brownwood Pit permit to allow the haul road and river crossing to access the Gardels Pit. Such revision must be approved and additional bond posted prior to the construction and use of the road and river crossing. 9. The mine plan map depicts a haul road to be constructed between Cells A and B and Cells C and D to eventually be routed into the adjacent Brownwood Pit (M-1979-059). Rule 6.3.3(g) requires the applicant to specify the dimensions of any existing or proposed roads that will be used for the mining operation. Any improvements necessary on existing roads and the specifications to be used in the construction of the new roads needs to be described in the permit and included as part of the permitted acreage. The applicant will also need to address reclamation of any new or improved roads constructed on site. Please specify the construction methods, dimensions and the drainage/runoff conveyance structures of all new and upgraded roads. Also, please provide information regarding the design of the drainage/runoff structures to evaluate the structure sizing. 10. Please state the depth of the cells, the anticipated slope of the mining face and indicate on the exhibit(s) the direction of mining. 11. Please list and locate on the applicable exhibit all structures that will be constructed on site (i.e. plants, offices, trailers, tanks, etc...) and provide their associated dimensions and composition in order to accurately estimate a cost for removal in the reclamation bond estimate. l2. The earthwork table (Table 6.4.4-1) prepared by the applicant depicts topsoil and overburden to be stripped in advance of mining. Overburden piles are not depicted on any of the exhibits, only topsoil piles. In accordance with Rule 3.1.9(1), topsoil and overburden must be segregated and stored separately. Please revise the exhibits to depict the location of the overburden piles. 13. Please inform the Division as to how topsoil and overburden piles will be protected to prevent wind and water erosion to include the dimensions of the piles and a temporary seed mixture. If a seed mixture is proposed, please state the rate in PLS(acre, application method and timing of seeding. 14. Rule 3.1.9(3) requires that topsoil stockpiles be stared in places and configurations to minimize erosion and be located in areas where disturbance by ongoing operations will be minimized. • The topsoil pile adjacent to Cells A and B is directly south of the pit highwall. Please state the distance between the tope of the topsoil and the top edge of the mining pit. Please demonstrate that this distance is adequate to ensure the topsoil pile will not be disturbed by the mining operations. • The topsoil pile adjacent to Cells A and B on the southwest corner is less than 20 feet to the Big Thompson River. Please demonstrate that this pile will not be impacted from runoff or storm events that occur along the River. • The topsoil piles in Cells C and D are located in the middle of the active pits. Please explain how the topsoil piles will be protected from the ongoing mining operations. • The topsoil pile in Cell C has a portion of the haul road running through the middle of the pile. The applicant will need to either relocate the topsoil pile or the haul road. Please revise the exhibits accordingly. 15. The applicant proposes a sediment pond to be constructed south of Cell B. Please describe in further detail the construction, dimensions, use and management and of this pond. Please explain how water