Colleton County Bridge Report Card

Colleton County scores 84 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

B84 / 100

Local infrastructure snapshot

Colleton County, South Carolina

Colleton County has 231 bridges in the National Bridge Inventory, with 6 rated poor and 7 rated scour-critical. Its poor-condition share of 2.6% is at or below the 6.3% statewide average. Poor-condition bridges carry about 26,600 daily vehicle crossings.

231Total Bridges

6Poor (2.6%)

149Fair (64.5%)

7Scour-Critical

Quote-Ready Local Facts

2.6%of county bridges are in poor condition, compared with 6.3% statewide and 6.7% nationally.

26,600daily vehicle crossings are on poor-condition bridges in the county.

7bridges are rated scour-critical, or 3.0% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Colleton County a Bridge Condition Exposure Score of 84/100 (B). The county has 231 bridges in the National Bridge Inventory, including 6 in poor condition and 7 rated scour-critical. Poor-condition bridges carry about 26,600 daily vehicle crossings. Poor condition does not mean unsafe; bridges judged unsafe are closed or restricted by transportation agencies.

Download all county report-card scores as CSV.

How the Score Breaks Down

Factor	Weight	County Value	Penalty
Poor-condition bridge share	40	2.6%	5.2
Poor-condition traffic exposure	25	3.4% of measured traffic	2.6
Scour-critical bridge share	20	3.0%	6.1
Average age vs national baseline	10	54 years vs 48 nationally	2.5
Traffic-data completeness	5	771,700 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	2.6%
State Poor-Condition Share	6.3%
National Poor-Condition Share	6.7%
County Scour-Critical Share	3.0%
Average Bridge Age	54 years
Poor-Condition Traffic Exposure	26,600 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeUS 17 over Edisto River — 19,300 vehicles/day Oldest Listed BridgeSc 64 over Chessey Creek — built in 1921 All County BridgesBrowse every bridge record in Colleton County.

Top Bridges to Watch in Colleton County

Bridge	Reason	Condition	Daily Traffic	Year Built
US 17 over Edisto River	Poor condition + traffic exposure	Poor	19,300	1953
Sc 64/bells HWY over Buckhead Creek Trib	Poor condition + traffic exposure	Poor	2,900	1931
US 17 Alt over Combahee River	Poor condition + traffic exposure	Poor	1,350	1940
US 21 over Buckhead Creek (2)	Poor condition + traffic exposure	Poor	1,250	1955
S-15-64 over Indian Creek	Poor condition + traffic exposure	Poor	950	1958
S-15-41/riter RD over Ashepoo River	Poor condition + traffic exposure	Poor	850	1956
US 17 Alt over Ireland Creek	Scour-critical foundation rating	Fair	11,500	1938
Sc 61/augusta HWY over Edisto River Swamp	Scour-critical foundation rating	Fair	3,000	1949
Sc 61/augusta HWY over Edisto River Swamp	Scour-critical foundation rating	Fair	3,000	1949
Sc 64/bells HWY over Buckhead Creek	Scour-critical foundation rating	Fair	2,900	1931

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.