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~' 14 majority of the survey report, however, concentrates upon two rock art sites, 5LA1060 and 5LA1064, at the eastern end of the corridor. The survey corridor was extended from Milepost 58.4 to Velasquez Plaza in October and November 1981 (Gleichman 1983). The surveyors located and recorded 20 cultural localities: 18 prehistoric sites and two isolated finds. All of the sites were lithic scatters of varying size and artifactual density but 14 contained ground stone and eight had features (hearths, wall (^ alignments, or stone clusters). Most of the sites are bate Prehistoric in age: eight sites had small side- or corner- notched projectile points, three had Sopris Phase (A.D. 1,000- 1,225) ceramics, and one yielded a radiocarbon date of 1090±55 BP. Two sites exhibited Archaic (Middle and Late) affiliations, while three had Protohistoric occupations. These results indicated that human occupation of the Picketwire Valley was probably continuous for the last 3,000+ years but probably seasonal. Site density is high in the area with most sites having been occupied within the last 1000 years. In 1983, Nickens and Associates conducted an archaeological study ~ of an area located a few miles east of the Golden Eagle Mine. This study was performed in two phases: the first phase involved a cultural resources inventory of 920 acres near Segundo, Colorado, which were scheduled to be affected immediately by coal mining activities; and the second phase consisted of a cultural resources overview of a 40-square-mile block surrounding the immediate impact area where future coal mining is proposed. The survey recorded 45 cultural resources localities: 7 previously recorded sites, 29 new sites, and 9 isolated finds. Of the 36 sites, 21 contained prehistoric r materials and 15 were historic. Two-thirds of the prehistoric sites are identified as campsite, containing lithic aaterials, groundatone, and/or features. A smaller number (24 percent) oP sites are described as lithic scatters, containing lithic debitage or prepared tools. Two sites (10 percent) are described as habitations, containing structural remains as well as lithic materials, groundstone, or features. The majority (13 sites or "_ 85 percent) of the historic localities contain one or more structures, usually accompanied by trash. Two sites (13 percent) are groups of water control check dams unaccompanied by artifacts or structures. Seventeen (13 historic and 4 prehistoric) sites were judged to be significant and eligible for nomination to the { National Register of Historic Places. ~ The overview considered the attributes of all known cultural ~ resource localities in the block area and derived some estimates of site frequencies and site density. It was estimated that approximately 110-120 unrecorded historic sites were located in the project area. Expected site types include residential dwellings, inactive mines, abandoned railroad lines, a townsite, abandoned schools, and windmills. The majority of these historic