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Redwood City Stormwater Roadmap Recommended Assessments September 2025 6-4 Schaaf & Wheeler 6.1.6 Shoreline Infrastructure ESA’s Sea-Level Rise Vulnerability and Adaption Planning Study should be reviewed and recommended capital improvements that are yet to be completed should be catalogued to be included in the prioritization of capital improvement projects. The study included a planning-level assessment of shoreline infrastructure and sea-level rise risk for the City and detailed suggested infrastructure improvements along the shoreline and provided cost estimates (ESA, 2024). Estimated Cost: $20,000 to $40,000 6.1.7 Identifying and Prioritizing Capital Improvement Projects It is recommended the capital improvement projects include both conveyance infrastructure and shoreline infrastructure detailed in ESA’s Sea-Level Rise Vulnerability and Adaption Planning Study (ESA, 2024). For conveyance infrastructure, hydraulic modeling results and condition assessments should be utilized to determine and map level of service (LOS) limitations. Remedies for system issues should be developed on a coarse level along with initial prioritization. Infrastructure priorities should be based on life safety and property damage potential. These initial capital improvement projects should be presented to the City for review and comment. Once the list of the most critical projects has been established, priority rankings and costs should be applied to all identified CIPs. Based on identified funding sources, a CIP schedule should be developed. The planning horizons are likely immediate, 5-year, 10-year, and 20-year, or as otherwise established with the City. While these projects require upfront investment, improvements to the City’s stormwater and shoreline systems yield significant long-term savings by reducing flood damage, lowering emergency response costs, and preserving property values. Every dollar invested in resilient infrastructure is expected to return multiple dollars in avoided losses and economic stability, making these improvements not only critical for public safety but also a fiscally responsible strategy for the City. Estimated Cost: $60,000 to $80,000 6.1.8 Cost Estimate Cost estimates should be prepared for the identified projects using a combination of regional data, published data, and recent projects that have gone to bid. Condition-related project costs should be based on recent construction bids for similar work. Project contingencies should be developed to estimate the soft costs that cannot be detailed at the conceptual design level. Soft costs should include design, permitting, easement or right-of-way acquisition, and any other associated costs to complete the project. Estimated Cost: $10,000 to $20,000 11.A. - Page 27 of 53 458