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Page 3 October 14, 2020 <br /> 1.2.2 Area 13:Miscellaneous Access Roads <br /> Documentation that defines the locations of the Miscellaneous Access Roads(Area 13)in detail in the original <br /> reclamation plan is limited (see Table 2). Based on field observations, a number of older roads have been <br /> reclaimed and are no longer used. These roads include the Old Surface Process,New Surface Process,Beyond <br /> Microwave, and Vicinity of Microwave as shown in Table 2. The roads were located on the slope above the <br /> Upper Bench and on the slope between the Upper Access Road and the Lower Access Road(see Figure 3A).It <br /> is uncertain what portions of these roads have been released from warranty, but it is assumed that some were <br /> released in 1986 because of their association with other areas released at that time. <br /> The remaining and existing roads that may have been included in Area 13 under"Mine Bench and Portal"are: <br /> 1)Upper Access Road,4.8 acres; 2)Upper Bench Road, 1.4 acres; and 3)Lower Bench Road, 1.5 acres. Other <br /> roads include the Lower Access Road, 1 to 1.4 acres, and the Evaporation Pond Road, 1.3 acres. The Lower <br /> Access Road was associated with access to the Heater/Treater(Area 15)reclamation area and also accessed Dry <br /> Gulch to the area below the Lower Mine Dump(Table 2).These acreages have been estimated using mine maps <br /> and GIS methods and assumed an average road width of up to 24 feet.As a result,acreage measurements may <br /> not match those originally measured and shown in Table 2. <br /> Of these roads,the Upper Bench Road and the upper portion of the Lower Access Road were reseeded in 2005 <br /> and have successfully revegetated. All other unreclaimed roads shall remain open for use in mine monitoring. <br /> Therefore, the total estimated unreleased acreage for Area 13,Miscellaneous Access Roads, is 8.6 acres. This <br /> acreage is close to the acreage estimated by DRMS in January 2006(10 acres). <br /> OOSI is requesting that the Upper Bench Road(1.4 acres)be released of warranty as well as the upper portion <br /> of the Lower Access Road(about 0.2 acres).The Upper Bench Road is shown in Figure 3A and 3C. <br /> 1.3 Soil Barrow Area <br /> The Soil Barrow Area was excavated in 2005 to support revegetation at the Upper Bench,Upper Bench Road, <br /> and Research Mine area.The Soil Barrow Area has been regraded and revegetated.OOSI is requesting that the <br /> Soil Barrow Area an area of 0.65 acres be released of warranty(see Figure 9). <br /> 1.4 Structures <br /> 1.4.1 Vaults,Pipelines,and Evaporation Pond <br /> Structures that remain at the mine site include two vault structures, one on the Lower Bench and one on the <br /> Research Mine Bench, one sealed ventilation shaft, and one capped and vented ventilation shaft. Pipelines <br /> include the Retort Water Pipeline which conveys retort mine water from the sealed L-1 portal at the mine site to <br /> the Evaporation Pond;the Logan Wash Mine Mine Water Drainage Pipeline(LW-001)which extends from the <br /> sealed L1 portal to the Lower Bench Vault and then to an infiltration gallery on the Lower Bench; and the <br /> Research Mine Mine Water Drainage Pipeline (LW-002)which extends from the sealed Research Mine portal <br /> through the Research Mine Vault to the Lower Bench Vault and on to Lower Bench discharge and infiltration <br /> point. See Figure 3A,3B,and 3C for the locations of these structures. <br /> The two bench vaults are administered as confined space concrete structures with surface access-ways <br /> constructed just above grade. Depending on the final mine closure method, these structures may remain as <br /> permanent structures on the mine site to manage and monitor mine water drainage. <br /> AYeld el I_10142020.d ocx <br />