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Mooresville adopts consolidated stormwater ordinance, adds redevelopment trigger and HOA turnover rules
Summary
The Mooresville Board of Commissioners approved an ordinance consolidating two stormwater chapters, aligning local code with state requirements, creating a variance procedure and civil-penalty tiers, and requiring stormwater mitigation for redevelopment that adds more than 10,000 square feet of new impervious surface.
The Mooresville Board of Commissioners on March 17 adopted an ordinance consolidating two separate stormwater chapters of the town code and making a series of updates to post-construction, enforcement, and HOA-turnover procedures.
Town stormwater staff said the rewrite combines Chapter 24B and Chapter 25 into a single, easier-to-navigate chapter, brings local language into alignment with recent state requirements and audit findings, and formalizes enforcement and administrative procedures. “So it's going to be a whole lot easier for people to find the information that they need,” said Allison Craft, the town's stormwater presenter.
The ordinance formalizes three main categories of change presented to the board: adjustments required by changes at the state level, revisions suggested by the state inspection/audit process, and clarifications to make the code more user-friendly for homeowners, developers and HOAs. Among the substantive edits: a tiered civil-penalty structure for illicit discharges (for example, dumping materials into conveyance systems), a formal variance procedure that can involve the board of adjustment, and updated terminology replacing “best management practice” with “stormwater control measure.”
Staff told the board the rewrite changes how long-term maintenance funding for stormwater control measures is handled; language adopted in 2023 removed the town's ability to require a one-time escrow payment calculated from total construction cost, and the revised code reflects new procedures for partial developer funding and available escrow accounts to pay for emergent repairs when HOAs lack capacity. The ordinance also formalizes as-built certification and required HOA turnover meetings so new homeowners' associations are informed of maintenance responsibilities when a stormwater facility is turned over.
The board approved a new redevelopment threshold: when a redevelopment project adds more than 10,000 square feet of new impervious surface, the applicant must include stormwater mitigation. Allison Craft said the threshold was chosen to avoid triggering mitigation for very small projects while capturing larger redevelopment that can increase runoff; “we wanted to have something that was large enough… if somebody's really coming in and demolishing a site and rebuilding it, we felt like that 10,000 square feet was going to capture some of that type of work,” she said. Commissioners asked staff to monitor the threshold for unintended consequences and to bring further refinements if needed.
Commissioners also approved removing date-specific annual inspection deadlines so inspections can be scheduled on a rolling basis, which staff said will help spread contractor workload and avoid inspection backlogs. Commissioner questions focused on which party is responsible during HOA turnover and how developers, HOAs and town staff will coordinate that process; staff said the town will act as a moderator during turnover to clarify long-term obligations and to help prioritize compliance items.
There was no public comment during the hearing. The motion to adopt the ordinance was made by Commissioner West and seconded by Commissioner Keriker; the board voted to approve the ordinance.
The consolidated chapter will appear in the town code as the single stormwater chapter and is intended to be a “living document,” staff said, with future tweaks expected as state rules change or operational issues arise.
