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Historic Properties Treatment Plan, Collom Mine, Colorado 29 <br />6 4.4 SITE 51VIF6098 <br />4.4.1 Phase I Testing <br />To test the site, three backhoe trenches (Trenches A, B, and C), 20 auger tests, and three 1 x 1 -m <br />test units are proposed. The trenches will reveal, in profile, the surface that the eroding cultural <br />material is originating from and will permit evaluation of these deposits. Trenches A and B will <br />be located on the western bank of Collom Creek, and Trench C will be on the eastern bank of <br />Collom Creek. Trench A will be T- shaped, with a trench 20 in long and 4 in deep running <br />perpendicular to Collom Creek and another trench 10 m long and 4 m deep parallel to Collom <br />Creek at the western end of the 20 -m trench. Trench B will be 20 m long and 4 in deep running <br />perpendicular to Collom Creek in the southwest portion of the site. Trench C will be 20 in long <br />and 4 m deep trending through the densest artifact scatter at the site on the eastern bank <br />running perpendicular to Collom Creek. Once the trenches are dug, the wall will be evaluated <br />for evidence of buried cultural horizons. The 20 auger tests will be placed on portions of <br />Collom Creek near Feature 1, as well as around the trenches. The three test units will be placed <br />where the auger testing and trenches indicate the highest potential for buried cultural deposits. <br />4.4.2 Phase I1 Data Recovery <br />Based on the results of the Phase I testing, up to an additional 40 m of excavation may be <br />warranted. This data recovery will follow the methods detailed in Section 5.2 below. <br />47599 TRC Mariah Associates Inc. <br />