2013-02-19_GENERAL DOCUMENTS - C1981014

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Southfield C1981014: MT6 10 February 19, 2013 applicable regulatory requirements. The access road is approved to remain as a permanent road. Reclamation of the roads, if not kept in place by landowner requests, will be the following: roads will be ripped and scarified and slopes blended, natural drainage will be re- established, areas disturbed will be topsoiled and re- vegetated if and where possible. The following light use roads are approved in the Southfield Permit, at the request of the landowner, to remain as permanent roads: South mine fan (1.2 miles), monitoring well 65 (0.5 miles), Corley Well (0.04 mile) , Newlin Creek topsoil stockpile (0.7 mile), and Parking lot from CR92 (0.03 miles). All light use roads are shown on Map 17, Map 18, Map 19, and described in Section 2.05.3, Section 2.05.4, page 21 R of the permit application package. Several existing ranch roads were used for occasional access to monitoring sites or reclamation activities. Subsidence A report entitled "Subsidence Survey, Subsidence Monitoring, and Subsidence Control Plan Dorchester No. 1 Mine" was prepared by Rocky Mountain Geotechnical (RMG) for Dorchester Coal in 1983. This report is still utilized by EFCI. The RMG subsidence data are contained in Exhibit 23 of the PAP. Possible subsidence holes between the Thompson Ranch driveway and Newlin Creek channel were identified by the landowner who notified the Division in November 2011. Six holes ranging from 20 foot diameter and 15 feet deep, to 5 foot diameter and 5 foot deep had formed overlying an area that had been mined by Energy Fuels as well as an historic mine, The Canon National Mine. This location is better described as T20S, R70W, NE'/ NE'/ Sec 25. EFCI backfilled these holes with material stockpiled adjacent to the area, compacted the material in the holes to minimize settling, graded, seeded and mulched the affected area in late fall 2012. The repairs were acceptable to the Division. A subsidence crack was noticed by the landowner east of the light use road to the Newlin Creek topsoil stockpile footprint. EFCI graded the surface expression of this crack to minimize water flow into the crack. EFCI is required to conduct a subsidence survey in 2013. Boreholes A landowner has expressed concern regarding unsealed boreholes throughout the mine property. The Division conducted an inspection of resource confirmation holes (exploration holes) within the property in October 2012. Borehole locations were located in the field using a GPS.