Oro Valley staff report MS4 third‑quarter compliance work and outreach ahead of monsoon season

Oro Valley stormwater staff briefed commissioners on the FY23–24 MS4 third‑quarter compliance report on April 18, saying the utility continues required education, inspection and illicit‑discharge work and is preparing for monsoon‑season maintenance.

John Spyker, stormwater utility manager, reviewed the five minimum control measures required under the MS4 program — public education and outreach, public participation, illicit‑discharge detection and elimination, construction‑site runoff controls, and pollution prevention for municipal operations — and said staff completed a range of inspections and outreach this quarter. Spyker noted a flyer about the stormwater utility was included with recent water bills to explain the utility’s purpose and the $4.50 monthly fee.

Spyker described two near‑term maintenance actions paired with Pima County Flood Control: sediment and vegetation removal at the Muddera Rooney Push Wash Confluence (Granite Drive/Oracle Road) and bank and handrail repairs at Gravel Pit Wash near Riverfront Park to restore conveyance before monsoon rains. He urged residents to expect staff outreach at the Steam Pump Ranch event on April 20 and said county crews will begin channel work in coming weeks.

Why it matters: the MS4 program requires ongoing public education and inspections; staff told commissioners the program’s reporting year ends in June and they expect to complete required elements on schedule. Spyker also flagged the larger need to update older floodplain studies in town, noting several studies predate the 1980s and should be revisited to improve local hydrology planning.

What’s next: staff will continue inspections, pursue grant funding for major channel projects, coordinate with Pima County Flood Control on enhancements to rain‑gauge and alert integration, and provide the commission with more detailed scopes and cost estimates for proposed projects.