PERMFILE40503 - Laserfiche WebLink

Home Browse Search

The SEDCAD+ analyses and all associated inputs are presented in Appendix 12-2, Small Area Exemption Demonstration. As shown in the analysis, due to the successful revegetation efforts, there is no runoff from either site. Given these results HGTI requested, and received CDfB~ approval to permit this area as a small area exemption. Diversion Ditches A number of runoff collection ditches were constructed inside the facilities area during the initial construction in 1979-1980. These ditches route surface runoff to one of the sediment ponds or away from the disturbance area. Exhibit 12-2, Surface Water Control Plan Map, shows the location of these diversions. During the permit transfer process, HGTI and CDMG personnel agreed that the existing hydrologic structures required designs, but that the requirement would only be applicable to the drainage ditches and culverts in the facilities area. In order to demonstrate that the drainage ditches meet the intention o£ the CDh~ Rule 4.05.3, SEDCAD analyses were conducted on the existing diversion ditches. Appendix 12-4, Diversion Ditch and Culvert Design, presents design demonstrations for the facilities azea drainage ditches. The ditch designs are summarized in Table 12-1, Facilities Area Diversion Ditches. Existing and proposed culverts within the permit boundary aze shown on Exhibit 12-2, Surface Water Control Plan Map. Culvert design demonstrations are presented in Appendix 12-4, Diversion Ditch and Culvert Design, and summarized on Table 12-2, Hayden Gulch Loadout Culverts. New diversion ditches and/or culverts constructed as pazt o£ any facility modifications mill be designed in accordance with Rule 4.05.3. Transportation Facilities The following describes the transportation facilities within the permit area. Haulage Roads: There are currently approximately 2,400 feet of haulage roads (HGLF-HR1) within the permit area. The HGLF-HR1 haul road starts at the southwest corner of the permit area (at the junction with Routt County Road 53) and progresses eastward to the facility entrance gate for the truck dump. The haul road then continues through the gate to the Truck Dump Hopper. Haul road HGLF-HRS was constructed in accordance with CDfG's regulations as described in Appendix 12-3. A certification statement prepazed by the previous operator/permittee (H-G Coal Company) certifies that HGLF-HR1 was constructed in accordance with CMLRD regulations. A copy of the certification statement is presented in Appendix 12- 5, Haul Road Certifications. Figure 12-1, Typical Sections for Haul Roads, was originally • included in the H-G Coal Company permit package (Permit C-80-003; Volume II, Exhibit J) and pertains to HGLF-KR1. TR-06 5 Revised 05/05