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2 A north-south oriented limestone ridge crosses Dowe Flats near North 55th Street (County Road 97), which is the major north- south access road. The vegetation is primarily cultivated lands and pasture. Grasslands and shrubs surround the cultivated regions at the margins of the Study Area. South of the major portion of the Study Area is a riparian zone along the irrigation ditches, extending south beyond St. Vrain Creek. The main road construction activities will be the relocation of County Road 97 and the construction of a private haul road. As displayed in Figure I, the Dowe Flats project includes a 3B5 acre impact zone (mine quarries, haul roads, conveyer and crusher, and stockpiles). The impact zone is located within a 1,911 acre mine permit boundary which includes more than 1,500 acres of undeveloped buffer and setback for the mine project. Southdown owns an additional 600 acres in the Dowe Flats, Indian Mountain, Rabbit Mountain region that is outside and adjacent to the mine permit boundary. The cultural resource Study Area boundary displayed in Figure I covers more than.2,200 acres including all of the impact zone, all of the mine permit boundary, all of the West Dowe Flats parcel, approximately one- half of the Northwest Uowe Flats property and Southeast Dowe Flats property. Also, at the request of Jerry Orback, a member of the cultural resources project team, portions of the existing Silicate Quarry that will be mined in the future, plus a buffer zone around this quarry, were included in the Study Area. Beginning in 1989, Southdown contracted with Burney and Associates, Paragon Associates and Western Historical Studies, Inc., to direct and undertake an identification program for significant prehistoric and historic properties at the Dowe Flats site. The surveys for prehistoric and historic resources were undertaken by Michael Burney, Jennifer Germer, Marcus Grant, Jerry Orback, Carol Mehls and Steven Mehls. The scope and purpose of the surveys was to locate, record and evaluate prehistoric archaeological and above ground (non-archaeological) historic architectural/engineering resources in the Study Area.