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Page 14 of 20 City of Redwood City 1017 Middlefield Road, Redwood City, CA. 94063 Tel: 650-780-7000 www.redwoodcity.org the US Army Corps of Engineers, and State and Regional Water Boards. Work in bay-front areas requires additional permits from the Bay Conservation and Development Commission. b. Stormwater Responsibilities for Local Creeks The conditions of the concrete-lined segments of Redwood Creek were assessed in 2012 and 2019 for structural deficiencies. Some creek channels have been replaced, including 850 linear feet of concrete wall. In 2024, the City Council approved two concrete channel wall improvement projects. Both projects addressed channel segments that failed during large storm events and represent the condition of the aging concrete channel infrastructure. The City has ongoing maintenance responsibility of the concrete lined-channels due to the improvements made in 1962, however, this differs from creeks with natural banks which are the responsibility of the property owner(s) that the creek runs through. The Bayfront Canal and Atherton Channel Flood Improvement and Habitat Restoration Project, completed in 2023, was a significant collaboration with adjacent agencies including OneShoreline, the San Mateo County Flood and Sea Level Rise Resiliency District. Construction of the stormwater diversion structure has allowed for diversion of stormwater from the Bayfront Canal to the Don Edwards National Wildlife Refuge during high tides to mitigate flooding in neighborhoods near the Bayfront Canal and Atherton Channel. PWS staff maintains and operates the diversion structure under agreement with the partner agencies. Cordilleras Creek, which borders the City of San Carlos, is a natural creek, and therefore the maintenance is the responsibility of the private properties adjacent to the creek, with both cities being responsible for crossings and stormwater outfalls. c. Stormwater Risks Identified in Multijurisdictional Local Hazard Mitigation Plan and 2024 Sea Level Rise Vulnerability Assessment The County of San Mateo 2021 Multijurisdictional Local Hazard Mitigation Plan anticipates increased heavy rain and more intense storm events as a result of climate change, increasing the likelihood of stormwater run-off and flooding. To reduce such impacts, the City and developers continue to install new green infrastructure. At the scale of a city or county, green infrastructure refers to the patchwork of natural areas that provide habitats, flood protection, cleaner air, and cleaner water for the environment. These benefits are realized by the absorption and storage of stormwater throughout the City rather than flowing to our creeks and the Bay. The City, in conjunction with OneShoreline, completed the Sea Level Rise Vulnerability Assessment in 2024 to understand and plan for sea level rise impacts in Redwood City. The City is also developing a Stormwater Roadmap (Roadmap) to determine how to prioritize studying the different stormwater issues including sea level rise and other flood hazards. d. Stormwater Budget Unlike other utilities the City operates which have self-supporting enterprise funds, the stormwater system does not have funding from property-related fees, and therefore, competes with other priorities from the City’s General Fund. Historically the budget allocated from the General Fund to stormwater projects has fallen short of the actual needs for the stormwater system and even with grants, studies, 9.A. - Page 14 of 20 499