Clark County, IN Environmental Rules: Erosion Control (2026)

C. 15-5. 03, the chapter reaches any project requiring subdivision plat approval or a local improvement location permit, any grading, excavation or filling disturbing 40,000 square feet or more, and any excavation/filling combination moving 400 cubic yards or more of soil, sand, gravel or stone. Agricultural activity, non-expanding maintenance on existing structures, single-family lots under 40,000 square feet with 2% or less slope, and small livestock operations are exempt. 10 requires the developer or landowner to file a permit application, an erosion and sediment control plan, a memorandum of erosion control responsibility naming the party accountable for the measures, and pay an application fee; the Drainage Board may also demand a surety bond or irrevocable letter of credit to guarantee the work.

07 sets the operating rules once work starts: sediment-laden runoff must be detained on site, storm drain inlets need gravel bags or filter fabric protection, tracked sediment must be cleaned up without flushing it with water, and vegetative stabilization must begin within seven days of the last land-disturbing activity unless weather prevents it. Straw bales are barred as an erosion control device (mulch use only). 08 spells out what the plan itself must contain: a site map with floodplains, soil types, drainage patterns and topography, plus a construction schedule for installing and maintaining the control measures. 15 adds a catch-all: even tracts below the 40,000-square-foot/400-cubic-yard trigger must retain all sediment on site. 11 to check compliance.