Kentucky Stormwater Regulations
Kentucky's stormwater regulations govern runoff from active construction sites and post-construction developments to protect water quality under the Clean Water Act framework. Sites disturbing one acre or more require KPDES General Permit (KYR10) coverage, enforcing erosion control and sediment control measures.
Key agencies include the Kentucky Division of Water (KDOW), Kentucky Energy and Environment Cabinet (EEC), U.S. EPA, and local MS4 municipalities.
Sewer System Regulations
The Kentucky Plumbing Code requires minimum slope of 1/4 inch per foot for building drains, approved pipe materials (PVC Schedule 40 and ABS), watertight joints, and proper venting. On-site sewage disposal systems are regulated under 902 KAR 10:085, requiring soil percolation testing and certified installer requirements.
Best Management Practices (BMPs)
- Silt fence: Filters sediment-laden runoff at site perimeter
- Sediment basin: Settles suspended solids before discharge
- Erosion control blanket: Stabilizes bare soil on slopes
- Stabilized construction entrance: Traps mud and aggregates from vehicles
Land Disturbance and Floodplain Requirements
Land disturbance permits are required for projects disturbing one acre or more, grading that alters drainage channels, or developments in floodplain areas. Approval timelines range from two to six weeks. Floodplain management requires elevating finished floors above base flood elevation and maintaining conveyance capacity of natural channels.
Consequences of Non-Compliance
Penalties include administrative fines up to several thousand dollars daily, stop-work orders, and permit revocations. Non-compliance leads to emergency breaches, suspension of drainage system activities, sedimentation in streams, and restoration mandates.