Oxnard committee backs phased Channel Islands Harbor water‑quality plan and asks staff to also pursue pumping option

The Oxnard Public Works and Transportation Committee voted 3–0 on April 14, 2026 to recommend that the City Council move forward with phase one of a Channel Islands Harbor water‑quality implementation plan and to explore both the staff‑recommended passive Edison Canal connection and a pumping option.

Anthony Miller, special districts manager in Oxnard Public Works, told the committee the plan, prepared with Craftwater Engineering, evaluated 103 candidate strategies and organized potential actions into three buckets: non‑structural (programs, outreach), structural (built infrastructure) and receiving‑water strategies (actions in the harbor or canal). "In total, 103 strategies were considered," Miller said, and staff used a prioritization matrix balancing cost, water‑circulation benefit and pollutant‑reduction potential to select a smaller subset for phase one.

The plan responds to a 2018 low dissolved‑oxygen event and algal bloom that caused fish kills and odors, Miller said, and relies heavily on volunteer monitoring data collected by neighborhood and advisory groups. He described the primary constituents of concern as pesticides (including bifenthrin and permethrin), copper and low dissolved oxygen that contribute to eutrophic conditions.

The Marine Advisory Committee (MAC) and neighborhood representatives urged a different emphasis. "When that pumping stopped, then that flow stopped," Dave Copper, a Channel Islands Neighborhood Council board member and MAC participant, said, arguing the Mandalay generating station pumps had previously provided circulation. Chuck Carter, a MAC member, and other speakers recommended prioritizing agricultural runoff treatment at key drains (Doris, Fifth Street, Wooley) and tailwater‑recovery or filtration systems at those outfalls rather than some distant infiltration basins.

MAC and neighborhood speakers proposed a lower‑cost pumping pilot to recreate northerly flow. "We project that a continuous pump of as low as 3,000 gallons a minute would be sufficient to produce this northerly flow for 11 months out of the year," one commenter stated, urging staff to reject the passive canal connection and pursue pumping and filtration at outfalls instead.

City staff and the Craftwater consultant cautioned that the technical modeling prioritized residence‑time reduction for circulation benefits and that different evaluation criteria can yield different top choices. "The technical modeling was done based on the pumping that was the rate of pumping that was done during the operation of the power plant," consultant Brendan (Brian) Evans said, adding that the report evaluated both passive and pumping options and considered feasibility, cost and permitting. He also noted that under federal and state law the movement or discharge of polluted water is tightly regulated: "Under the Clean Water Act, under California's Porter‑Cologne Act, the discharge of pollutants is regulated," he said, and regulatory agencies could require filtration or more stringent permitting.

Staff urged a multi‑track approach in phase one: start lower‑barrier non‑structural work such as outreach and targeted solicitations, pursue selected structural pilots, implement monitoring and adaptive management, and begin regulator conversations about receiving‑water strategies and any pilot discharge or pumping proposals. Miller said non‑structural steps can be implemented quickly through existing purchasing and program processes, while structural and receiving‑water strategies will require engineering, permitting and longer regulatory lead times.

Director of Public Works Michael Wolf told the committee staff relied on the report's projected pollutant‑load reduction estimates when forming recommendations. He said the recommended approach is to pursue a balanced package of actions and to ask regulators whether filtration, discharge location, or other mitigation would be required if a pumping option were advanced.

After public comment and discussion the committee amended the staff recommendation to instruct the City Council to direct staff to proceed with phase one activities "including an evaluation of both the passive Edison Canal connection and a pumping option," and to continue source‑control, structural pilot work and monitoring. The committee recorded the voice vote as carrying 3–0.

What happens next: the committee forwarded the recommendation to the City Council for consideration, while staff will begin solicitations, monitoring setup and targeted regulator outreach as part of phase one. The technical report and staff memo remain the record for specifics on ranked strategies, estimated costs and the monitoring framework.

Authorities referenced in the discussion included the Clean Water Act, California's Porter‑Cologne Water Quality Control Act, the State and Regional Water Quality Control Boards and Coastal Commission permitting authorities, and municipal MS4/MPDES reporting requirements.