25B - AGMT - ENVIRONMENTAL SERVICES FOR WARNER AVE WIDENING

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Deliverable: ® Draft and Final Preliminary Engineering Plans PRELIMINARY COST ESTIMATE This task involves the development of planning-level construction associated with the build alternative. Budget-level estimates for future project phases will be developed based on estimated construction costs. Construction Cost Estimates IBI will use the engineering plans and utilities and drainage studies to prepare planning level estimates for probable construction costs for each of the build alternatives. Quantities and costs will be organized in these categories: civil/roadway, earthwork, traffic, retaining walls, utility relocations, drainage modifications, and landscaping and irrigation. Cost items under each section will include unit cost, estimated quantity, and total cost. Lump sums for supplemental items (e.g., temporary erosion control) and items not quantifiable at this phase will be calculated as a percentage of the total. An overall contingency will be applied to account for unknowns. Unit cost information will be obtained from published sources (2007 Caltrans Cost Data Book, BNi 2005 Costbook for Public Works, etc.) and recent relevant projects. City staff will review an initial cost estimate template (including cost items and their associated unit costs). After they concur, cost estimates will be prepared and draft street improvement plans and cost estimates will be submitted to the City at the same time as the Preliminary Engineering Report. Cost estimate calculation worksheets will be included in the appendix. Cost Estimates for Future Project Phases IBI will use the construction and ROW cost estimates to develop budget-level costs for each build alternative of subsequent project phases, including: final design (PS&E) and construction management. These costs will be in the Preliminary Engineering Report, with any backup calculation information included in the appendix. Deliverable: • Cost Estimate Summary Worksheets RIGHT-OF-WAY MAPS - Based on the selected roadway improvement plans, VA Consulting will prepare 24'x 36" ROW maps at a scale of I" = 40'. These maps will include existing and new street centerlines, existing and proposed right of way lines, property lines, agency boundaries, all adjacent parcels and cross-streets, topography, building footprints, parcel numbers, addresses, indication if full or partial take of each property and amount of ROW being taken from each parcel. Deliverable: 6 Final maps on mylar and electronically as both pdf and dgn files. SURVEYS AND GIS MAPPING Establish environmental baseline data in a manner compatible with engineering and topographic mapping. Coordinate with Base Mapping (165.10.20) on the environmental components/data to be included in the GIS database, including Section 4(f) resources, historic properties, 100-year floodplain, hazardous materials sites, sensitive visual features, land uses and right-of- way and noise receptors. Data from publicly available sources will be used as a starting point and adjusted, as appropriate, based on field surveys and observations conducted by The Planning Center team. Data will be provided in a manner consistent with the base mapping (160.10.20) to ensure that the datasets are compatible and can be utilized for evaluation of each alternative's effects on the environment. City of Santa Ma - Proposal to Prepare Environmental Documents for Warner Avenue Widening Project The Planning Center I Page 7 25B-10