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

4. The plan must be drawn at a scale no less than one inch equals one hundred feet, carry a current datum and north arrow, and show contours extending to the centerline of bordering roads. Where runoff drains into a sinkhole or drainage well, the county requires the well and its tributary drainage area to be delineated. The section lists specific erosion-control deliverables: temporary erosion and sediment control measures used during construction must appear on a separate sheet (item p), and the plan must show final stabilization measures for every disturbed area, with slopes of 2:1 or steeper stabilized with rip rap, sod, or another method the County Engineer approves, with stabilization shown for each individual ditch (item q).

The same section requires detention and retention areas to include an emergency overflow unless the County Engineer waives it, and requires all stormwater infrastructure tied to the lots on a Construction Plan to be in place and approved by the Rutherford County Engineering Department before any lot can be released for sale. Omitting any required item makes the application incomplete and it is returned to the applicant or design engineer. The Planning Commission will not approve a final plat until the County Engineer has signed off on the construction plans, and plans and engineering calculations must carry the seal of a Tennessee-registered engineer. A separate Rutherford County Stormwater Management Ordinance covers design standards referenced elsewhere in these regulations but is not itself part of this plan-submission requirement.