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.
Construction in Rockland must follow the NYS Standards and Specifications for Erosion and Sediment Control (the Blue Book, 2016 edition) incorporated by NY DEC's SPDES General Permit for Stormwater Discharges from Construction Activity (GP-0-20-001). Projects disturbing 1 acre or more require NOI filing with DEC and a Stormwater Pollution Prevention Plan (SWPPP) prepared by a qualified professional. Rockland MS4 towns — Clarkstown, Ramapo, Haverstraw, Orangetown, Stony Point — have local laws adopting the state standards with additional review. Minimum controls: silt fence along down-gradient limits, stabilized construction entrance (rock pad), inlet protection on storm drains, temporary/permanent seeding within 7-14 days of disturbance. Town of Clarkstown §177 (Soil Erosion and Sediment Control) requires permit for disturbance over 5,000 sq ft; Ramapo §195 requires permit for significant grading. Rockland County Soil and Water Conservation District provides technical review. Steep slope ordinances add requirements for grading on slopes >15%.
DEC penalties under ECL Article 17 up to $37,500 per day per violation. Local stop-work orders and fines $250-$1,000 per day. Silt leaving the site into waters triggers separate water quality violations.
Rockland County, NY
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Rockland County, NY
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Rockland County, NY
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Rockland County, NY
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Rockland County, NY
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Rockland County, NY
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See how Rockland County's erosion control rules stack up against other locations.
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