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2 <br /> A north-south oriented limestone ridge crosses Dowe Flats near <br /> North 55th Street (County Road 47) , which is the major north- <br /> south access road. The vegetation is primarily cultivated lands <br /> and pasture. Grasslands and shrubs surround the cultivated <br /> regions at the margins of the Study Area. South of the major <br /> portion of the Study Area is a riparian zone along the irrigation <br /> ditches, extending south beyond St. Vrain Creek. The main road <br /> construction activities will be the relocation of County Road 47 <br /> and the construction of a private haul road. <br /> As displayed in Figure I, the Dowe Flats project includes a 385 <br /> acre impact zone (mine quarries, haul roads, conveyer and <br /> crusher, and stockpiles) . The impact zone is located within a <br /> 1, 911 acre mine permit boundary which includes more than 1, 500 <br /> acres of undeveloped buffer and setback for the mine project. <br /> Southdown owns an additional 600 acres in the Dowe Flats, Indian <br /> Mountain, Rabbit Mountain region that is outside and adjacent to <br /> the mine permit boundary. The cultural resource Study Area <br /> boundary displayed in Figure I covers more than 21200 acres <br /> including all of the impact zone, all of the mine permit <br /> boundary, all of the West Dowe Flats parcel, approximately one- <br /> half of the Northwest Dowe Flats property and Southeast Dowe <br /> Flats property. Also, at the request of Jerry Orback, a member <br /> of the cultural resources project team, portions of the existing <br /> Silicate Quarry that will be mined in the future, plus a buffer <br /> zone around this quarry, were included in the Study Area. <br /> Beginning in 19890 5outhdown contracted with Burney and <br /> Associates, Paragon Associates and Western Historical Studies, <br /> Inc. , to direct and undertake an identification program for <br /> significant prehistoric and historic properties at the Dowe Flats <br /> site. The surveys for prehistoric and historic resources were <br /> undertaken by Michael Burney, Jennifer Germer, Marcus Grant, <br /> Jerry Orback, Carol Mehls and Steven Mehls. The scope and <br /> purpose of the surveys was to locate, record and evaluate <br /> prehistoric archaeological and above ground (non-archaeological) <br /> historic architectural/engineering resources in the Study Area. <br />