5 rules for unincorporated Rockland County, New York.
Verified from official government sources
Rockland County is covered by the NYSDEC SPDES MS4 General Permit (GP-0-15-003). Municipalities including Clarkstown, Ramapo, Orangetown, Haverstraw, and Stony Point enforce local stormwater management codes requiring SWPPPs for construction disturbing one acre or more. Rockland County Drainage Agency oversees certain drainage works.
Erosion and sediment control in Rockland County requires compliance with the NYS Standards and Specifications for Erosion and Sediment Control (Blue Book). Local codes mandate silt fencing, stabilized construction entrances, and stabilization of disturbed areas. Grading permits from local building or engineering departments are required.
Rockland County's Hudson River shoreline towns (Piermont, Nyack, Grand View, Haverstraw, Stony Point) fall under NY Coastal Management Program and Hudson River Valley Greenway. NYS DOS coastal consistency review, DEC tidal wetland permits, and scenic area protections apply to waterfront development.
Rockland County participates in the National Flood Insurance Program (NFIP). FEMA Flood Insurance Rate Maps (FIRMs) for Rockland County were last updated, with effective dates varying by municipality. Development in Special Flood Hazard Areas (SFHAs) along the Hudson River, Hackensack River, Ramapo River, and tributaries requires floodplain development permits. Lowest floor elevation must be at or above Base Flood Elevation plus freeboard (typically 2 feet in NY).
Grading and drainage work in Rockland County requires permits from local building or engineering departments. Significant grading triggers SWPPP requirements. Rockland County Drainage Agency oversees drainage district works including the Mahwah, Pascack, Sparkill, and other creek systems. Steep slope ordinances restrict grading on slopes over 15-25%.
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