Dubuque County staff outline stormwater limits, warn data centers would drive large detention needs
County watershed staff said projects that disturb 1 acre or more require a stormwater permit and showed that a hypothetical 420‑acre data‑center campus with ~35% impervious surface would demand millions of cubic feet of detention and extensive treatment infrastructure.
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Eric Schrock, Watershed Program Director for Dubuque County Watersheds, told residents that the county’s stormwater ordinance requires permits for projects that disturb 1 acre or more and that engineers size stormwater systems around three goals: water‑quality volume, channel protection and flood protection. "Projects that disturb 1 acre or more of ground require a stormwater permit," he said during the county’s public engagement meeting.
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