Council adopts stormwater master plan update, staff urges new funding approach

The Salinas City Council on March 11 unanimously adopted an updated stormwater master plan that inventories the city—s storm-drain assets, models flood risks and recommends priority projects. Staff and consultants told the council the city faces significant deferred needs and does not currently have a dedicated funding mechanism for stormwater; the study estimated a 20-year moderate-investment program at roughly $237 million and said additional recurring revenue of about $6.5 million per year would be needed to implement that plan.

Heidi Nigameyer, the city—s Stormwater Program Manager, told the council, "We have over 6,000 assets and over 145 miles of pipes, culverts and channels" and said much of the system dates back decades. Wallace Group consultant Valerie Huff summarized the plan—s approach: field surveys, elevation confirmation, condition assessment, hydraulic modeling and a ranking framework that weights flooding frequency, severity, impacts to critical facilities and climate resilience.

Why it matters: The plan maps locations at high probability of failure, lists 18 high-priority projects (combined estimated construction cost about $12 million) and identifies many more mid- and low-priority pipeline projects. Without a new sustained funding source, staff warned, the city will continue reactive maintenance at higher lifecycle cost and face rising public-safety and infrastructure risks.

Project findings and risks

Wallace Group said high-priority projects include upsizing inlets and pipes, sediment removal in basins and targeted studies to investigate public-private basin solutions for agricultural runoff entering city systems. The consultants explained that even adequately sized pipes can flood if inlets are undersized or if sediment and debris reduce capacity.

Nigameyer described recent storm damage and emergency repairs as examples of the cost of deferred maintenance. She told council members that pavement collapsing and emergency bypassing during repairs increase costs and public-safety exposure. "If we do minimal proactive repairs and maintenance over the next 20 years," she said, "over a third of the city's assets will be at very high risk of failure." The plan quantified three funding scenarios; the moderate, proactive course would avoid very-high-risk outcomes but requires new revenue.

Funding and next steps

Unlike the sanitary sewer enterprise, Salinas has no stormwater rate or dedicated enterprise fund; stormwater work today is mostly funded from the general fund, staff said. Nigameyer outlined recent grant pursuit efforts (urban greening, NOAA resilience challenges, Clean Water SRF) and said timing and eligibility limited success so far. She said staff continues to pursue grant opportunities and recommended the council consider long-term options including a stormwater utility or other dedicated mechanism.

Council discussion and adoption

Council members thanked staff for the thorough field work and modeling. Several members emphasized outreach and equitable prioritization: councilors asked that projects targeting disadvantaged neighborhoods and multi-benefit designs (green infrastructure that also improves streets and open space) be prioritized. Council members asked staff to return with funding feasibility work if the council wants to pursue a utility or other dedicated revenue source.

The council adopted the master-plan update by unanimous vote and directed staff to continue grant-seeking, outreach and further study of funding options.