Definitions
Beachfront Jurisdiction
Baseline - Within a standard erosion zone the baseline is established at the location of the crest of the primary oceanfront sand dune in that zone. In a standard erosion zone in which the shoreline has been altered
naturally or artificially by the construction of erosion control devices, groins, or other man-made alterations, the baselines must be established by the Department using the best scientific and historical data, as
where the crest of the primary ocean front sand dune for that zone would be located if the shoreline had not been altered.
Within an unstabilized inlet zone the baseline must be determined by DHEC-OCRM as the
most landward point of erosion at anytime during the past forty years, unless the best available scientific and historical data of the inlet and adjacent beaches indicate that the shoreline is unlikely to return to
its former position. In collecting and utilizing the best scientific and historical data available for the implementation of the retreat policy, the Department as part of the State Comprehensive Beach Management Plan
provided for in this chapter, among other factors, must consider: historical inlet migration, inlet stability, channel and ebb tidal delta changes, the effects of sediment bypassing on shorelines adjacent to the inlets,
and the effects of nearby beach restoration project on inlet sediment budgets.
Within a stabilized inlet zone the baseline location must be determined in the same manner as provided for in a standard erosion
zone. However the actual location of the crest of the primary oceanfront sand dune of that erosion zone is the baseline of that zone, not the location if the inlet had remained unstabilized.
Setback line - The line landward of the baseline that is established at a distance which is forty times the average annual erosion rate as determined by historical and other scientific means and adopted by the Department
in the State Comprehensive Beach Management Plan. However, all setback lines shall be established no less than twenty feet landward of the baseline, even in cases where the shoreline has been stable or has experienced
net accretion over the past forty years. Note: Subsequent to S.C. Code of Laws 48-39-290, a setback line is not present on Folly Beach.
Beach Zones
Standard Zones - a segment of shoreline which is subject to essentially the same set of coastal processes, has a fairly constant range of profiles and sediment characteristics, and is not directly influenced by tidal
inlets or associated inlet shoals.
Unstabilized Inlet Zones - inlets that have not been stabilized by jetties, terminal groins, or other structures.
Stabilized Inlet Zones - inlets which are stabilized by jetties, terminal groins, or other structures.
Definitions are excerpted from S.C. Code of Laws 48-39-10 et. seq. and S.C. Code of Regulations R.30-1 et. seq.