Norwalk, CT Environmental Rules: Erosion Control (2026)

Norwalk Code § 118-1122 sets the trigger: a soil erosion and sediment control plan must be submitted with any development application once the disturbed area reaches more than one-half (1/2) acre, counted cumulatively. Section 118-1123 carves out one exemption: a single-family dwelling that is not part of a subdivision of land does not need a plan. For everything else, § 118-1124 requires the plan to include a construction schedule, design and installation details for erosion controls and stormwater facilities, a maintenance program, and a site map at a scale of at least 40 feet to the inch showing topography, soil types, wetlands and proposed grading.

Under § 118-1125, plans must follow the Connecticut Guidelines for Soil Erosion and Sediment Control (1985), and the Commission may grant exceptions only for technically sound reasons. Before certification, § 118-1126 lets the Fairfield County Soil and Water Conservation District review the plan and make recommendations within 30 days, and the Commission must forward the proposal to the Conservation Commission or another review agency for comment within the same 30-day window. Section 118-1127 bars site development from starting until the plan is certified and any control measures scheduled for early installation are in place and functional, and it lets the Commission require a financial guarantee, held by the Commission or Corporation Counsel, covering the estimated cost of the erosion and sediment control work; that guarantee is released only after the improvements are complete and satisfactory, or within 65 days of a release request if problems remain.

Section 118-1128 gives the Commission or its designated agent authority to inspect the site during construction and to demand progress reports confirming the certified measures are installed and maintained.