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Any work in a Class I or II wetland or its jurisdictional buffer, including filling, dredging, draining, ditching, cutting woody vegetation, may require a permit from the Vermont Wetlands Program. Both Class I and Class II wetlands appear on the VSWI maps. Class II wetlands have a 50-foot buffer which is protected, and Class I wetlands have a 100-foot regulatory buffer. These buffers are measured from the edge of a delineated boundary (field verified) from the wetland.Origin: Wetland Advisory maps are a combination of wetland mapping created by towns, from Wetland Program site visits, or by advanced state mapping efforts. Where base maps originate from aerial photography, those imagery is more recent than National Wetland Inventory derived VSWI maps. 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