Allendale County Bridge Report Card

Allendale County scores 56 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

F56 / 100

Local infrastructure snapshot

Allendale County, South Carolina

Allendale County has 69 bridges in the National Bridge Inventory, with 9 rated poor and 3 rated scour-critical. Its poor-condition share of 13.0% is above the 6.3% statewide average. Poor-condition bridges carry about 4,125 daily vehicle crossings.

69Total Bridges

9Poor (13.0%)

45Fair (65.2%)

3Scour-Critical

Quote-Ready Local Facts

13.0%of county bridges are in poor condition, compared with 6.3% statewide and 6.7% nationally.

4,125daily vehicle crossings are on poor-condition bridges in the county.

3bridges are rated scour-critical, or 4.3% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Allendale County a Bridge Condition Exposure Score of 56/100 (F). The county has 69 bridges in the National Bridge Inventory, including 9 in poor condition and 3 rated scour-critical. Poor-condition bridges carry about 4,125 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	13.0%	26.1
Poor-condition traffic exposure	25	7.2% of measured traffic	5.4
Scour-critical bridge share	20	4.3%	8.7
Average age vs national baseline	10	57 years vs 48 nationally	3.8
Traffic-data completeness	5	57,350 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	13.0%
State Poor-Condition Share	6.3%
National Poor-Condition Share	6.7%
County Scour-Critical Share	4.3%
Average Bridge Age	57 years
Poor-Condition Traffic Exposure	4,125 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeUS 301 over Savannah River — 1,300 vehicles/day Oldest Listed BridgeUS 321 over Jackson Creek — built in 1921 All County BridgesBrowse every bridge record in Allendale County.

Top Bridges to Watch in Allendale County

Bridge	Reason	Condition	Daily Traffic	Year Built
US 301 over Savannah River	Poor condition + traffic exposure	Poor	1,300	1965
Sc 3 over Little Briar Creek	Poor condition + traffic exposure	Poor	800	1957
Sc 3 over King Creek	Poor condition + traffic exposure	Poor	700	1957
Sc 3 over Watchcaw Creek	Poor condition + traffic exposure	Poor	700	1957
S-3-66 over Lower Three Run Creek	Poor condition + traffic exposure	Poor	125	1950
S-3-88 over Bentley Branch	Poor condition + traffic exposure	Poor	125	1961
S-3-241 over Miller Creek	Poor condition + traffic exposure	Poor	125	1961
S-3-241 over Miller Creek	Poor condition + traffic exposure	Poor	125	1961
S-3-342 over Call Branch	Poor condition + traffic exposure	Poor	125	1966
S-3-65 over Three Runs Creek	Scour-critical foundation rating	Good	175	1997

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.