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Historic Properties Treatment Plan, Collom Mine, Colorado 21 <br />Modern disturbances to the site include animal grazing, erosion, and several two -track and <br />crowned - and - ditched roads that bisect the site. <br />The prehistoric; component is present on both the east and west floodplain of Collom Creek and <br />stretches over 2,620 ft (800 m) along the creek. The component consists of three projectile <br />points, nine bifaces, two retouched flakes, one scraper, three choppers, 789 pieces of debitage, <br />and nine pieces of groundstone. The surface artifact scatter is denser closer to the creek. <br />Two artifact concentrations are visible. The first concentration of artifacts is on the east bank <br />immediately southwest of the crowned - and - ditched road and consists of debitage and lithic <br />tools. The .second concentration is located on the western bank southwest of the first <br />concentration and consists of several pieces of groundstone, bifaces, and a feature. <br />Four features (F1, F2, F4, and F5) are associated with the prehistoric component and are all <br />eroding from the western cutbank of Collom Creek. Fl is an eroded sandstone heat - altered rock <br />concentration with charcoal staining located on the modern ground surface in the southwestern <br />portion of the site. Ten pieces of heat - altered rock are present over an area measuring <br />50 x 20 cm. Additionally, a single tertiary chert flake is present among the rocks. F2 consists <br />of staining and charcoal with 35 tabular sandstone pieces eroding from the western bank of <br />Collom Creel.. The feature is 1 m long and approximately 70 cm thick. F4 is another <br />heat - altered rock concentration with staining eroding from the west bank of Collom Creek. Four <br />pieces of heat.- altered rock are visible eroding from a 40 -cm long stain. F5 consists of two <br />pieces of heat - altered rock and charcoal that was found just below a metate (Groundstone 6). <br />The feature is approximately 50 cm long and 5 cm thick. F5 is the deepest of the features <br />eroding from the cutbank at approximately 3 m below surface. <br />The three projectile points recovered from the site are illustrated in Figure 3.5. Projectile <br />Point 1 is a complete side - notched point made of an orange chert measuring 2.3 x 1.6 x 0.4 em. <br />The point has a convex base and is heavily reworked. Projectile Point 2 is the proximal portion <br />47599 <br />TRC Mariah Associates Inc. <br />N <br />16 <br />