Get Full Government Meeting Transcripts, Videos, & Alerts Forever!
Get email alerts on the Stormwater topic
No spam. Unsubscribe anytime.
Council approves storm‑drain/floodplain updates requiring basins to drain within 72 hours and clarifying standards
Summary
Grantsville approved ordinance 2024-36 to update storm drainage and floodplain provisions, including a 72‑hour drawdown requirement for retention/detention basins (for vector control) and clearer engineering/design standards; staff said maintenance responsibility remains with private owners unless the city reaches MS4 thresholds.
Grantsville City Council approved updates to the city’s storm drainage and floodplain code Dec. 4 that add a 72‑hour drawdown requirement for retention/detention basins and better reference existing city stormwater design standards.
Staff explained the 72‑hour drawdown requirement is intended for vector control (mosquitoes) and that signs and plat notes should make basin locations and maintenance responsibilities clear to property owners. Councilmembers questioned whether private owners could be liable if a basin on private property caused downstream flooding; staff said citations and corrective orders would be the city’s enforcement tool and that the city is not planning to take over maintenance of private basins unless and until regulatory thresholds (MS4 designation) require municipal responsibility.
The ordinance adds cross‑references to the city’s engineering standards and clarifies that some submittals (geotechnical reports, water/sewer modeling) could be required or waived by the zoning administrator or planning commission depending on project type. Council approved Ordinance 2024-36 by voice vote.
Next steps: staff will incorporate referenced design standards into the code update documents and continue coordination with FEMA/state flood mapping as those processes proceed.
