Mount Vernon, NY Environmental Rules: Erosion Control (2026)
Key Facts
- Max disturbance without SWPPP override
- 5 acres at a time
- Governing manual
- NYS Erosion Control Manual ("Blue Book")
- Inspection frequency
- Every 7 days + after 0.5" storms
- Enforcing officer
- Stormwater Management Officer / City Engineer
- First-offense fine
- Up to $350, up to 6 months jail
Summary
Construction sites in Mount Vernon can't disturb more than five acres at once without an approved plan. City Code § 226-8 caps active soil disturbance under the state's Erosion Control Manual, the "Blue Book," part of the stormwater pollution prevention plan every qualifying land-disturbing project must file before the Planning Board or Stormwater Management Officer will review it.
Construction phasing plan describing the intended sequence of construction activities, including clearing and grubbing, excavation and grading, utility and infrastructure installation and any other activity at the site that results in soil disturbance. Consistent with the New York Standards and Specifications for Erosion and Sediment Control (Erosion Control Manual), not more than five acres shall be disturbed at any one time unless pursuant to an approved SWPPP;
Full Breakdown
Any land development or redevelopment activity in Mount Vernon must file a stormwater pollution prevention plan, or SWPPP, before the Planning Board or Stormwater Management Officer (the City Engineer) will review the application (§ 226-7). That plan has to lay out a construction phasing schedule, and § 226-8A(4) caps active disturbance at five acres at a time unless the approved SWPPP itself authorizes more. Erosion and sediment control practices designed to the New York State Stormwater Management Design Manual and the New York Standards and Specifications for Erosion and Sediment Control, the "Erosion Control Manual" or Blue Book, are presumed to satisfy the chapter's standards (§ 226-11).
Once construction starts, a qualified professional must inspect erosion and sediment control practices every seven days and within 24 hours of any storm producing half an inch of rain or more, logging results in a site logbook (§ 226-12B), and the applicant must give the City's enforcement official 48 hours' notice before starting construction, installing controls, or reaching other milestones (§ 226-16A). Sediment traps or ponds have to be cleared once their capacity drops by half (§ 226-12A). The City can require a performance bond or letter of credit before construction begins to guarantee the work gets finished to standard (§ 226-17).
Violations & Fines
A site out of compliance gets a written notice of violation and can be hit with a stop-work order (§ 226-18A, B). Fines run up to $350 and six months in jail for a first offense, $350 to $700 for a second offense within five years, and $700 to $1,000 for a third or later offense in that period, with each week of continued violation counted as a separate offense; the Stormwater Management Officer can also withhold a certificate of occupancy and the City can force restoration of disturbed land at the violator's cost.
Frequently Asked Questions
How much land can a construction site clear at once in Mount Vernon?
Who inspects erosion control measures during construction?
What happens if a site violates the erosion control rules?
Sources & Official References
Other rules in Mount Vernon
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Erosion Control in Nearby Cities
How other cities in Westchester County handle erosion control.