Public works details drainage fixes, Foothill culvert project and new MS4 requirement
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Summary
Public works staff briefed council on culvert repairs, a proposed 960-foot Foothill storm-drain project (42-inch culvert) tied to a CDBG application, and the coming MS4 trash-capture mandate as Oroville approaches the population threshold.
Public Works Director Tim told council members the department has identified several localized failures and bigger drainage projects that will shape the 2026–27 budget.
Tim described a recurring flood spot at the Table Mountain–Grand intersection where crews found a blocked stubbed-in 18-inch culvert that had trapped debris and prevented flow: "somebody, maybe a couple decades ago... they stubbed in a 18 inch culvert and blocked our existing 18 inch culvert," he said, and staff cut the obstruction to restore flow. Tim warned the pavement has limited cover in that area and will need attention to address potential structural issues.
A larger proposal outlined by Tim is the Foothill storm-drain job: "a 960 foot section of 42 inch culvert that doesn't have a bottom," he said. Staff said they have applied for a CDBG grant to replace the culvert and pave around 2,000 feet of Foothill, and that grant timing matters because another planned project (a Westside public safety facility) will be eligible for certain grants only if at least 50% of Foothill work is completed before the next application cycle.
Tim also flagged regulatory changes. Oroville currently operates under an MS4 waiver for stormwater regulations but could lose that waiver if population exceeds 20,000; losing the waiver would trigger installation and maintenance of trash-capture devices and additional year-round maintenance costs. "So that that's gonna be pretty labor intense and equipment intense for a couple months a year," Tim said.
Staff recommended carrying forward design money where needed, pursuing grants for storm-drain work and considering in-house construction management to reduce costs. Tim argued in-house construction management could save significant amounts on large paving projects and proposed adding construction-inspector staffing so the city can do more projects internally.
Next steps: The council asked staff to place the Foothill and Norton Avenue items on upcoming agendas with design options and to return with the grant application schedule and contingency plans for maintenance obligations tied to the MS4 program.
