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Limited - Results Archaeological Survey Form (Page 4 of 11) <br />21. Ground Visibility: Surface visibility was good throughout the project area (ranging from 75 -90 %). <br />Vegetation cover was moderate throughout the area, with some areas of thick sagebrush that <br />limited ground visibility. <br />22. Comments: Special attention was paid to areas of exposed soils and subsurface contents in <br />cut banks and eroded areas. <br />V. LITERATURE REVIEW <br />23. Location of File Search: Office of Archaeology and Historic Preservation (OAHP)- Compass <br />online database <br />Dates: 03/31/2014 <br />24. Previous Survey Activity - In the project area: Eight previous cultural resource inventories cover <br />small portions of the proposed access to the borehole pads (see bolded entries in Table 1 and <br />project maps). These projects include OAHP numbers MC.E.R17, MC.LM.R319, RT.CM.NR2, <br />RT.CO.NR3 /NR4, RT.LM.NR77, RT.LM.R7, RT.LM.R27, RT.LM.R44. None of the four proposed <br />core holes surveyed for the current project had been covered by previous inventory. However, <br />none of the proposed access roads were excluded from survey for the current project; the <br />previous survey coverage was not sufficient. The seven additional core holes proposed by <br />Twentymile for this project were not newly surveyed because they were completely covered by <br />two previous inventories (see project maps): Metcalf's 2000 survey of Twentymile's Fish Creek <br />expansion subsidence area (RT.CM.R3) and Grand River Institute's 1980 Oak Creek expansion <br />for Pittsburgh and Midway Coal Companies (RT.LM.R76). <br />In the general region: Forty -three previous cultural resource inventories have been conducted within a <br />mile of the project area (Table 1). The majority of these projects have been conducted for <br />Twentymile Peabody Coal mining activities, with a fewer amount of transmission line, land <br />exchange, and Railroad projects. <br />25. Known Cultural Resources - In the project area: No previously recorded archaeological sites <br />are located within the immediate project area or area of potential affect (APE) (proposed core <br />hole pads or road corridors). The closest archaeological site is 5RT155, an NRHP eligible <br />prehistoric open camp, located over 600 feet northeast of proposed core hole pad WCO20 which <br />was previously inventoried for cultural resources. There are numerous isolated finds of artifacts <br />