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Marion council reviews stormwater operations and maintenance manual as part of master plan
Summary
City staff presented the operations and maintenance (O&M) manual for Marion’s stormwater master plan, emphasizing infrastructure‑risk ranking, routine inspection schedules, GIS asset tracking and next steps toward a full master plan due in spring 2026.
Marion’s city staff presented an update on the stormwater master plan and its operations and maintenance manual at the Dec. 16 council meeting, laying out priorities city engineers will use to manage pipes, basins and drainage assets. The update identified existing infrastructure risk as the highest priority, followed by water quality and ecological enhancements, and included proposed inspection and maintenance frequencies.
The O&M manual is intended as a working guide for staff, defining roles and responsibilities for inspection, maintenance, documentation and emergency response and recommending regular staff training and safety procedures. “The O and M manual focuses on roles and responsibilities, defining roles to help cover inspection, maintenance, documentation, and emergency response for an effective system operation,” said Emily Downey, a consultant with Anderson Bogart, during the presentation.
Consultant Mike Butterfield told the council the team will use a non‑monetary prioritization matrix informed by council and staff feedback to score projects after hydraulic modeling. “Existing infrastructure risk was the very clear top priority,” Butterfield said, noting the results reflected similar work in other communities.
The manual recommends establishing a public infrastructure inventory tracked in GIS, defining routine maintenance tasks (mowing, inlet cleaning, televising storm sewer pipes) and targeting an initial program of inspecting roughly 5% of the storm sewer system annually with an objective to increase to 10% over several years. Staff also recommended improvements in communications protocols for residents and formal confined‑space safety practices for crews.
Council members asked whether the plan will produce budget inputs for the January budget work session; staff said the O&M manual together with the forthcoming full master plan will provide a prioritized list of problem spots, cost estimates and timing to guide future CIP decisions. The full stormwater master plan and final report are expected to return to the council in spring 2026 for further review and adoption.
