25E - AGMT - ON-CALL ENGINEERING SRVS

Home Browse Search

Professional On-call Engineering Services City of Santa Ana RFP No. 17.083 ur The APP 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. iGeofechii1caf fnvesftrsotfen 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 Traffic Control Plan will not be required. R 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 materials 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. jrre(fprtm-esfgn 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 now 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. lifflill 25E-389 ANDERSON-PENNA