Sullivan County, TN Environmental Rules: Erosion Control (2026)

3 for single-family construction, public utility and roadway work, recognized agricultural uses, ordinary home landscaping, or silviculture. Projects that disturb an acre or more, are part of a larger common development disturbing an acre, or involve high-density residential, commercial or manufacturing work require Planning Commission or Building Commissioner review of the grading plan before the permit issues, and projects draining into a siltation-impaired stream or an Exceptional Water of the State must hold a pre-construction meeting with the County first. 7 sets the clock for stabilizing exposed ground: permanent erosion control measures must go in within 14 days after a portion of the site reaches final grade, and the same 14-day deadline applies to any denuded area that will sit undisturbed for more than 14 days even if it hasn't reached final grade.

Slopes graded at 3:1 or steeper get a tighter 7-day deadline to be temporarily or permanently stabilized once grading on that slope stops. Temporary soil stockpiles must be stabilized or ringed with sediment-trapping measures, and can't be placed where they create a sight-visibility hazard such as within a right-of-way. 6 requires cut and fill slopes steeper than 2:1 to be stabilized with rock riprap or an equivalent method approved by the Building Commissioner.