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REV: 11-19-25 LR Manager, and City Staff) with meaningful and potential future funding, the Consultant and team will prioritize deficiencies with at least four (4) gradients: Critical, High, Moderate, and Low. b. Task 9.b Develop Alternatives with Conceptual Plans, OOM Costs: after prioritizing deficiencies, the Consultant will begin developing alternatives for the high-priority deficiencies. The potential flood mitigation alternatives can be broken up into two distinct categories: 1) Bay side improvements, and 2) Interior (Creek) drainage improvements. Bay side improvements include shoreline levees, wetland storage, tide gates, and pump stations to mitigate the effect of high tides and SLR on reducing creek capacity. Interior (Creek) drainage improvements include raising bank elevations, creek flow diversion systems, upsizing culverts, and storm water capture systems (including detention) to improve creek conveyance capacity and to attenuate peak flows. Using the calibrated model developed under Task 6, the Consultant will evaluate a combination of these alternatives. The initial efforts will include developing up to twenty (20) model simulations to narrow down alternatives that provide the greatest relief. At the end of this effort, the Consultant will have identified a minimum of six (6) alternatives that will be further studied in detail using high-level cost benefit analyses to shortlist three (3) alternatives from which the City (City Engineer or designee, City’s Project Manager, and City Staff) will be able to select one preferred alternative. c. Task 9.c Evaluate Alternatives and Select One: as part of this task, the Consultant will evaluate up to six (6) alternatives identified previously under Task 9.b. Each alternative will be evaluated based on technical feasibility, effectiveness in flood reduction, environmental impacts, and cost-benefit considerations. The Consultant will include a qualitative assessment of potential construction-related impacts. This includes evaluating temporary traffic disruptions, detours, and lane closures that may be required during construction activities, particularly in high-traffic areas. Access to adjacent properties, businesses, and emergency routes will be considered to minimize community disruptions. The analysis will also identify potential environmental impacts associated with each alternative, such as effects on wetlands, sensitive habitats, water quality, and construction-related noise or dust. Where applicable, mitigation strategies will be recommended to address regulatory compliance, such as permitting under CEQA, Clean Water Act, and local ordinances. The evaluation will aim to balance technical performance with constructability, cost, long-term maintenance, and community impacts to support informed decision-making. ATTY/AGR.2025.317/Wood Rodgers, Inc. (Page 23 of 77)