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Transportation and Climate Change Clearinghouse

Impact Forecasts

State of South Carolina Statistics

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Increase in Eustatic SLR 6 cm 21 cm
Regular
Inundation
At-Risk Total Regular
Inundation
At-Risk Total
Length Km % Affected Km % Affected Km % Affected Km % Affected Km % Affected Km % Affected
Interstates 12.7 1% 4.4 0% 17.1 1% 13.6 1% 4.2 0% 17.8 1%
Non-Interstate Principal Arterials 17.4 0% 26.2 1% 43.6 1% 25.4 1% 22.2 1% 47.6 1%
Minor Arterials 5.9 0% 17.5 0% 23.4 0% 12.6 0% 13.8 0% 26.4 0%
National Highway System (NHS) 28.6 1% 28.1 1% 56.7 1% 36.2 1% 25.1 1% 61.3 1%
Rails 13.3 0% 25.2 0% 38.5 1% 16.7 0% 27.9 0% 44.6 1%
Area Acres % Affected Acres % Affected Acres % Affected Acres % Affected Acres % Affected Acres % Affected
Ports 81 10% 138 17% 220 27% 123 15% 117 14% 240 30%
Airport Property 144 1% 31 0% 176 1% 150 1% 44 0% 195 1%
Airport Runways 10 1% 2 0% 12 1% 11 1% 2 0% 13 1%
Total Land Area Affected 241,776 1% 245,457 1% 487,233 2% 307,226 2% 217,331 1% 524,557 3%


Increase in Eustatic SLR 31 cm 48.5 cm
Regular
Inundation
At-Risk Total Regular
Inundation
At-Risk Total
Length Km % Affected Km % Affected Km % Affected Km % Affected Km % Affected Km % Affected
Interstates 14.2 1% 4.3 0% 18.5 1% 15.1 1% 4.8 0% 19.9 1%
Non-Interstate Principal Arterials 28.1 1% 23.8 1% 51.9 1% 36.5 1% 24.7 1% 61.2 2%
Minor Arterials 14.8 0% 15.6 0% 30.4 1% 20.1 0% 14.3 0% 34.4 1%
National Highway System (NHS) 39.0 1% 26.9 1% 65.9 2% 48.2 1% 27.8 1% 76.0 2%
Rails 18.6 0% 30.4 1% 49.0 1% 27.2 0% 34.7 1% 61.9 1%
Area Acres % Affected Acres % Affected Acres % Affected Acres % Affected Acres % Affected Acres % Affected
Ports 131 16% 124 15% 255 32% 144 18% 152 19% 296 37%
Airport Property 156 1% 52 0% 208 1% 170 1% 68 0% 238 1%
Airport Runways 11 1% 3 0% 14 1% 12 1% 4 0% 17 1%
Total Land Area Affected 354,271 2% 200,140 1% 554,411 3% 422,745 2% 196,526 1% 619,272 3%


Increase in Eustatic SLR 59 cm
Regular
Inundation
At-Risk Total
Length Km % Affected Km % Affected Km % Affected
Interstates 15.8 1% 4.6 0% 20.4 1%
Non-Interstate Principal Arterials 39.2 1% 24.9 1% 64.1 2%
Minor Arterials 22.0 0% 14.7 0% 36.7 1%
National Highway System (NHS) 51.2 1% 28.4 1% 79.6 2%
Rails 30.2 0% 39.7 1% 69.9 1%
Area Acres % Affected Acres % Affected Acres % Affected
Ports 153 19% 154 19% 307 38%
Airport Property 182 1% 74 0% 257 1%
Airport Runways 13 1% 5 0% 18 1%
Total Land Area Affected 466,292 2% 173,357 1% 639,648 3%


1. Sources: Interstates, Non-Interstate Principal Arterials, Minor Arterials, and NHS - National Highway Planning Network (NHPN). Rails - Federal Railroad Administration.
Ports - Digitized from Digital Orthophoto Quadrangles clipped to the mean high water line. Airport Property and Runways - Tele Atlas.
2. The NHPN includes all Interstates and other Principal Arterials, all Rural Minor Arterials, and a small portion of the Urban Minor Arterials, as well as the NHS.
3. This study includes the Rural Minor Arterials but not the Urban Minor Arterials.
4. See section 3 of the "Study Goals and Methodologies" for an explanation of how these results were generated.
The results should not be understood as defining specific changes in water levels at precise points in time.
5. The Total column for each scenario includes the sum of Regular Inundation and At-Risk. The At-Risk column does not include Regularly Inundated data.

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