Horry County Bridge Report Card
Horry County scores 80 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Horry County, South Carolina
Horry County has 480 bridges in the National Bridge Inventory, with 24 rated poor and 9 rated scour-critical. Its poor-condition share of 5.0% is at or below the 6.3% statewide average. Poor-condition bridges carry about 290,925 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Horry County a Bridge Condition Exposure Score of 80/100 (B). The county has 480 bridges in the National Bridge Inventory, including 24 in poor condition and 9 rated scour-critical. Poor-condition bridges carry about 290,925 daily vehicle crossings. Poor condition does not mean unsafe; bridges judged unsafe are closed or restricted by transportation agencies.
How the Score Breaks Down
| Factor | Weight | County Value | Penalty |
|---|---|---|---|
| Poor-condition bridge share | 40 | 5.0% | 10.0 |
| Poor-condition traffic exposure | 25 | 7.8% of measured traffic | 5.9 |
| Scour-critical bridge share | 20 | 1.9% | 3.8 |
| Average age vs national baseline | 10 | 40 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 3,725,458 measured daily crossings | 0.0 |
Score = 100 minus weighted penalties. The score is a comparative research signal, not an official safety rating. Read the full methodology.
County Comparisons
| County Poor-Condition Share | 5.0% |
| State Poor-Condition Share | 6.3% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 1.9% |
| Average Bridge Age | 40 years |
| Poor-Condition Traffic Exposure | 290,925 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Horry County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| US 501 Byp over U.s.701 | Poor condition + traffic exposure | Poor | 56,800 | 1958 |
| US 501 Byp over Waccamaw River | Poor condition + traffic exposure | Poor | 56,800 | 1958 |
| US 501 over Crabtree Swamp | Poor condition + traffic exposure | Poor | 38,600 | 1948 |
| US 501 over Chinners Swamp | Poor condition + traffic exposure | Poor | 25,600 | 1948 |
| US 501 over Brunson Creek | Poor condition + traffic exposure | Poor | 25,600 | 1948 |
| US 701 over Crabtree Swamp | Poor condition + traffic exposure | Poor | 23,000 | 1920 |
| US 701 over Bear Swamp | Poor condition + traffic exposure | Poor | 17,400 | 1931 |
| US 701 over Maple Swamp | Poor condition + traffic exposure | Poor | 14,100 | 1931 |
| US 501 SB over Little Pee Dee River | Poor condition + traffic exposure | Poor | 13,900 | 1974 |
| Sc 319 over Chinners Mill Br (no. 3) | Poor condition + traffic exposure | Poor | 3,800 | 1970 |
Important safety note
Poor condition does not mean a bridge is unsafe. It means at least one major component has significant deterioration and the bridge is a priority for maintenance, repair, or replacement. Bridges judged unsafe are closed or restricted by transportation agencies.