Floyd County, IN Environmental Rules: Flood Zones (2026)

046(B) of the Floyd County Code requires every post-construction Stormwater Pollution Prevention Plan (SWPPP) to include buffer provisions tied to the FEMA flood plain. 046(B)(2), a waterway buffer defines an area where land-disturbing activity is allowed but construction of any building or structure is not permitted. 046(B)(2)(c) fixes that buffer as the area within a boundary set 25 feet beyond the FEMA-mapped flood plain boundary, or 50 feet from the top of the waterway bank measured by geomorphic shape rather than current water level, whichever distance is larger.

046(B)(2)(a). Automatic exemptions exist for roads and utilities crossing waterways and for pedestrian trails and walkways near waterways, provided erosion, sediment and water-quality controls are addressed. 046(B)(1), where grading, clearing and grubbing are barred outright, though pruning and partial vegetation removal are allowed. The waterway buffer must be at least as wide as the no-disturbance buffer where both apply, and the buffer area may still host water-quality devices if erosion and sediment controls are satisfied, as determined by the county. This chapter is administered by Floyd County Stormwater Management under Ordinance 2019-25.