Agmt14 Mark Thomas & Company, Inc.

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