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32 <br />• little disturbance other than grazing, and provided the only substantial <br /> area in the tract suitable for survey. <br />Much of the western portion of the tract is densely overgrown or <br />has excessive slopes. The northwestern corner is the only part in which <br />survey was feasible, although a long ridge line was covered to gain ac- <br />cess to a flatter area at the top. This flat area was too heavily vegetat- <br />ed to provide an adequate view of the surface. The ridge was examined <br />as thoroughly as possible. <br />Site Distribution <br />All sites located in Tract 7 were encountered adjacent to drainages <br />in the low-lying areas of the tract. The bulk of the sites, both pre- <br />historic and historic, was found in a seasonal drainage that parallels <br />the ridge between the tract and Grassy Creek. Four prehistoric sites, <br />5RT19, 5RT20, 5RT22, and 5RT23, are located in a cluster near the head <br />of the drainage while the two historic sites are situated further north <br />along the same small drainage. Routt County Road 27 parallels this <br />drainage and could explain the presence of the two historic sites in <br />their particular location. The cluster of prehistoric sites lies in a <br />sheltered locality, but more importantly, it is located at the northern <br />end of the Grassy Gap which provides access to Twenty mile Park to the <br />south. This location would provide a convenient camping spot for groups <br />passing from Twentymile Park into the Yampa River valley. <br />The fifth prehistoric site, 5RT18, is located a considerable distance <br />from the tract. It is a small open camp located near an interfluvial <br />• ridge, approximately one mile north of the tract. The artifactual <br />assemblage from this site is little different from materials located in <br />the other sites on Tract 7. <br />