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Once a project is identified, the Ardurra team can prepare a detailed scope, schedule, and fee. Below is a sample scope and schedule for a City of Santa Ana project involving improvements to Mile One Street — widening for approximately 1000' on one side of the street to accommodate a new bicycle lane. Mile One Street is classified as a major arterial highway with an existing right-of-way of 120 feet, which can accommodate the proposed widening. The roadway has three (3) traffic lanes of 12', 10' and 11' in each direction with a 14' wide existing median. Work consists of street rehabilitation, bicycle lane and sidewalk replacement and a landscaped parkway. The intersections at each end of the project have been improved as part of a separate project, therefore, the proposed project will join the existing BCRs/ECRs at the intersections. PHASE 1: PRELIMINARY ENGINEERING Research and Field Review A thorough search of the available records will be conducted to acquire relevant data to assist in the design of the project. The information accumulated will include as -built drawings, utility information, and horizontal and vertical control data. The project team will review the project in the field and take photographs of potential problem areas or items that need special attention. Particular emphasis will typically be given to identifying areas where existing improvements are in a deteriorated condition, pose a significant design constraint or could be impacted by the widening (utilities, walls, structures, driveways, etc.). Utility Coordination Information will be collected from all the utility companies. Coordination with the utilities will continue throughout the design of the project. A copy of the utility file will be provided to the City. For this project we have assumed no utility potholing will be required. Survey The Ardurra team will provide the necessary ground survey information required to design the project including topographical features and cross-section data. Cross -sections will be taken at 25-foot intervals for the length of the project from right-of-way to right-of-way. Additionally, we are proposing aerial mapping be performed for use as the base map to minimize survey costs. Geotechnical Investigation Perform review of available geotechnical data on and adjacent to the site. Geologic reconnaissance of the site to establish location and accessibility of planned cores and identify any localized failed pavement areas. Mark boring locations and notify Underground Service Alert 72 hours in advance of drilling. Obtain any necessary (no fee) permits from the City of Santa Ana, Because Mile One Street is a major arterial highway, we have assumed that traffic control will be necessary, but a Traffic Control Plan will not be required. It is assumed that traffic control, per the WATCH Manual or MUTCD, would be sufficient for our investigation. Coring of the existing pavement at twelve (12) locations (6 in each direction of travel) to approximately 2 to 5 feet below existing pavement grades to determine existing pavement and base thickness, general subsurface conditions, and to delineate any other soil parameters that may affect the proposed rehabilitation project. We will obtain representative bulk samples of the excavated matierials from selected borings and relatively undisturbed samples will be obtained at subgrade and two to three feet below subgrade. Upon completion, each of the borings will be backfilled with the native materials from the boring, and patched with cold patch asphalt, as necessary to match existing. We have assumed that the drilling operations can be completed in two (2) days. Appropriate laboratory testing including determination of classification, natural moisture content of soils, field densities of undisturbed samples, laboratory maximum densities, corrosive characteristics and 'R" value of soil and bedrock materials encountered, as necessary. Prepare a single Geotechnical Investigation Report for the subject portion of existing street addressing the geotechnical parameters outlined above and including log of the borings, the laboratory test results, and recommendations for new asphalt pavement construction and pavement rehabilitation. Alternative preliminary pavement strategies will be developed consisting of varying methods of constructing the improvements (overlay, total reconstruction, pavement fabric, asphalt rubber, etc.). A matrix will be prepared for each alternative comparing the advantages, including cost, impacts to existing improvements, duration of construction, and traffic control requirements. Preliminary Design The preliminary design phase will include the following tasks: ■ Attend project scoping meeting with City Staff to review project concept. ■ Develop up to 2 additional alternatives that incorporate the City's Complete Streets policy. ■ Prepare concept plans for plantings in the street parkway. The concept plans will be rendered colored plans and profile views of the proposed new plantings. A plant materials palette will accompany the concept plans. ■ Prepare Preliminary Design Report (PDR) that provides alternative analysis, recommendation for preferred alternative and preliminary cost estimate. We have assumed that the preferred alternative conceptual plan will constitute the 30% design level. City of Santa Ana I March 14, 2023 On -Call Engineering Services, RFP No.23-030 /\/ARDURRA