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Exhibit A (Scope of Work) <br />Task 4 – Geotechnical <br />This task includes geotechnical engineering services to support the design team. <br />Geotechnical engineering services are needed to support development of contract <br />documents for the construction of retaining walls, utilities, stormwater infrastructure, <br />signal pole foundations, and other road improvements associated with the project. <br />The geotechnical engineering effort will include the following activities: <br />Review Existing Geotechnical and Foundation Information <br />Collect and Review Available Geotechnical Data: Consultant will collect and review <br />readily available and relevant geotechnical information within the project site. This <br />review will include online geotechnical databases, geologic maps, and Consultant <br />library. <br />Pavement Coring <br />The Consultant will core the pavement at up to 28 locations within the travel lanes to <br />assist in pavement design for the project. Pavement will be conducted in coordination <br />with geotechnical borings. Consultant will photograph each of the pavement cores and <br />log the pavement layer and subsurface soil conditions to be included in the geotechnical <br />report. <br />Geotechnical Borings <br />The Consultant will conduct a series of up to four geotechnical borings along the <br />corridor in support of retaining wall design, signal pole design, luminaire foundation <br />design and infiltration potential screening. Geotechnical boing locations will include <br />permitting and development of traffic control plans required for the core locations. <br />Consultant will prepare summary boring logs and perform laboratory testing to evaluate <br />relevant physical properties of the site soils. Laboratory testing would include moisture <br />content, hydrometers, grain-size distribution, and Atterberg Limits. <br />Geotechnical Analysis <br />Based on the borings and the laboratory test results of selected samples, Consultant <br />will generate estimates of the soil strength and other properties to evaluate the effects <br />the subsurface conditions will have on the proposed improvements. Based on the soils <br />encountered along the alignment, Consultant will determine the Site Class for seismic <br />design. The design spectral acceleration parameters will then be selected in <br />accordance with the AASHTO Specifications for Road and Bridge. <br />Pavement Design Analyses <br />Consultant will prepare pavement designs for roadways that will be <br />reconstructed. Four pavement sections will be designed for the proposed <br />improvements, including the following: <br />