Marion County Bridge Report Card

Marion County scores 53 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

F53 / 100

Local infrastructure snapshot

Marion County, South Carolina

Marion County has 112 bridges in the National Bridge Inventory, with 10 rated poor and 14 rated scour-critical. Its poor-condition share of 8.9% is above the 6.3% statewide average. Poor-condition bridges carry about 45,850 daily vehicle crossings.

112Total Bridges

10Poor (8.9%)

64Fair (57.1%)

14Scour-Critical

Quote-Ready Local Facts

8.9%of county bridges are in poor condition, compared with 6.3% statewide and 6.7% nationally.

45,850daily vehicle crossings are on poor-condition bridges in the county.

14bridges are rated scour-critical, or 12.5% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Marion County a Bridge Condition Exposure Score of 53/100 (F). The county has 112 bridges in the National Bridge Inventory, including 10 in poor condition and 14 rated scour-critical. Poor-condition bridges carry about 45,850 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	8.9%	17.9
Poor-condition traffic exposure	25	10.4% of measured traffic	7.8
Scour-critical bridge share	20	12.5%	20.0
Average age vs national baseline	10	52 years vs 48 nationally	1.6
Traffic-data completeness	5	439,713 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	8.9%
State Poor-Condition Share	6.3%
National Poor-Condition Share	6.7%
County Scour-Critical Share	12.5%
Average Bridge Age	52 years
Poor-Condition Traffic Exposure	45,850 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeSc 576 over Catfish Canal — 11,900 vehicles/day Oldest Listed BridgeUS 76 over Smith Branch — built in 1925 All County BridgesBrowse every bridge record in Marion County.

Top Bridges to Watch in Marion County

Bridge	Reason	Condition	Daily Traffic	Year Built
US 501 Sbl over Little Pee Dee Swp-4	Poor condition + traffic exposure	Poor	9,950	1974
US 76 over Catfish Branch	Poor condition + traffic exposure	Poor	5,900	1941
Sc 576 over Catfish Canal	Poor condition + traffic exposure	Poor	11,900	1971
US 76 over Catfish Branch	Poor condition + traffic exposure	Poor	5,900	1941
US 301 over Agnay Swamp	Poor condition + traffic exposure	Poor	3,000	1930
Sc 41 over Back Swamp	Poor condition + traffic exposure	Poor	2,800	1930
US 76 over Little Pee Dee River	Poor condition + traffic exposure	Poor	2,600	1926
US 76 over Price Swamp	Poor condition + traffic exposure	Poor	2,300	1926
S-34-32 over Reedy Creek	Poor condition + traffic exposure	Poor	1,300	1977
S-34-64 over Pitch Pot Swamp	Poor condition + traffic exposure	Poor	200	1967

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.