S.C. Coastal Tidelands and Wetlands Act — Critical Area / OCRM Permit (SC)
Tracked preemption from the South Carolina overlay bundle.
Overview
← All state preemptionsSouth Carolina overlay roll-upSouth Carolina zoning wikiSouth Carolina building codesFederal overlaysGlossaryFederal-conflict: Yes
Effective
1977-06-21
Sunset
—
Authority
state
Scope
state:SC
Other South Carolina preemptions
S.C. Short-Term Rentals — No State Preemption (explicit non-preemption)S.C. ADU / Density / Design Review — No State Preemption (explicit non-preemption)S.C. Military Installation Compatibility — AICUZ / JLUS CoordinationS.C. §6-29-1145 — Manufactured Housing Zoning Parity RuleS.C. Brownfields / Voluntary Cleanup Program — §44-56-710 et seq.S.C. Local Government Comprehensive Planning Enabling Act of 1994 — Procedural FloorS.C. Scenic Rivers Act of 1989 — Designated Scenic, Recreational, and Natural RiversS.C. Beachfront Management Act — OCRM Baseline / Setback Line Overlay
Trigger predicate
When this evaluates true for a parcel, the law's preempted fields take precedence over base zoning.
AND
city.is_in_eight_coastal_counties==Trueparcel.in_ocrm_critical_area==True
Preempted fields
3 fields on the base district schema are rewritten when the trigger fires.
| Field | Op | Value | Note |
|---|---|---|---|
review_type | require | scdes_bcm_critical_area_permit | §48-39-130: a permit from SCDES Bureau of Coastal Management is required for any alteration of a critical area — coastal waters, tidelands, beaches, beach/dune systems. |
base_districts[*].critical_area_dredge_fill_authority | override | state_permit_supersedes_local | Dredging, filling, or alteration of tidal wetlands and marshlands is subject to state critical-area permitting regardless of local zoning. |
base_districts[*].allowed_uses | remove | unpermitted_critical_area_alteration |
Citation
Authority source
S.C. Code Ann. §§48-39-10 through 48-39-220 (Coastal Tidelands and Wetlands Act, 1977); §48-39-10 (definitions including 'critical area'); §48-39-130 (permits); S.C. Code of Regulations Chapter 30
§ §§48-39-10, 48-39-30, 48-39-130; R.30-1 et seq.
Research notes
The Coastal Tidelands and Wetlands Act is the umbrella statute under which the Beachfront Management Act (1988) is one chapter. The CTWA covers ALL coastal critical areas (estuarine waters, tidelands, beaches, beach/dune systems) in the eight coastal counties — not just beachfront. Federal nexus: Clean Water Act §404 permits (USACE Charleston District) and CZMA §307 federal consistency apply to federal actions affecting the SC coastal zone. SC Coastal Zone Management Program is federally approved under CZMA.