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7.1. B. - Page 13 <br /> 2.2 Consultant will perform design surveys of the wall alignment within 20 feet of the <br /> proposed wall location. Features to be located include: ground elevations, grade <br /> breaks, trails, surface evidence of underground utilities, signs and trees with trunk <br /> diameter of 4 inches or greater. Gravity utility structures will be located near the <br /> project site and invert elevations measured. <br /> The results of the survey will be drafted in an AutoCAD topographic base map and <br /> will serve as the basis for engineering design. Due to the small project area and <br /> the remoteness of the site, project control will be run on a random basis. Project <br /> control will be shown on the project plans and will be mathematically tied to the <br /> proposed improvements and relate to the adjacent retaining wall that was recently <br /> constructed. Potholing of existing utilities is included as an optional task. The <br /> scope of surveying does not include procurement of title reports, legal descriptions <br /> and plats, boundary surveys, or construction staking. <br /> Deliverables: <br /> • Existing conditions base map with existing utilities in AutoCAD and PDF <br /> format. <br /> TASK 3 — INITIAL DESIGN (75% DESIGN SUBMITTAL) <br /> 3.1 Consultant's geotechnical subconsultant, Cotton, Shires and Associates, Inc., will <br /> perform soil borings, testing, analysis, and prepare a Foundation Report for the <br /> retaining structure. <br /> 3.1.1 Surficial geotechnical investigation including review of available data and <br /> geotechnical reconnaissance. <br /> • Review of available data — published maps and reports pertinent to <br /> site conditions will be reviewed. <br /> • Geotechnical Reconnaissance — A surficial reconnaissance will be <br /> completed of the area to formulate a preliminary interpretation of the <br /> type and distribution of surficial materials (alluvium, fill and bedrock). <br /> CSA will then prepare an engineering geologic map of the proposed <br /> retaining wall area using a topographic base map to be provided by <br /> Mark Thomas in electronic AutoCAD format prior to reconnaissance. <br /> CSA will also layout boring locations and notify USA. <br /> 3.1.2 Subsurface geotechnical investigation including subsurface exploration <br /> (borings) and laboratory testing <br /> • Subsurface Exploration (Borings) — Four, small diameter borings <br /> will be advanced by means of a truck - mounted drill rig along the <br /> retaining wall alignment up to a depth of approximately 35 -40 feet <br /> in certain borings. The holes will be logged to aid in CSA <br /> interpretation of subsurface conditions. Selected samples will be <br /> collected to determine geotechnical properties for design. <br /> REV: 02 -21 -14 VR <br /> Page 10 of 17 <br /> ATTY /AGR.2014.019 /Mark Thomas & Company, Inc. <br />