St. Clair County Bridge Report Card

St. Clair County scores 87 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

B87 / 100

Local infrastructure snapshot

St. Clair County, Alabama

St. Clair County has 183 bridges in the National Bridge Inventory, with 3 rated poor and 4 rated scour-critical. Its poor-condition share of 1.6% is at or below the 3.4% statewide average. Poor-condition bridges carry about 21,180 daily vehicle crossings.

183Total Bridges

3Poor (1.6%)

132Fair (72.1%)

4Scour-Critical

Quote-Ready Local Facts

1.6%of county bridges are in poor condition, compared with 3.4% statewide and 6.7% nationally.

21,180daily vehicle crossings are on poor-condition bridges in the county.

4bridges are rated scour-critical, or 2.2% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives St. Clair County a Bridge Condition Exposure Score of 87/100 (B). The county has 183 bridges in the National Bridge Inventory, including 3 in poor condition and 4 rated scour-critical. Poor-condition bridges carry about 21,180 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	1.6%	3.3
Poor-condition traffic exposure	25	1.5% of measured traffic	1.1
Scour-critical bridge share	20	2.2%	4.4
Average age vs national baseline	10	58 years vs 48 nationally	4.2
Traffic-data completeness	5	1,448,473 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	1.6%
State Poor-Condition Share	3.4%
National Poor-Condition Share	6.7%
County Scour-Critical Share	2.2%
Average Bridge Age	58 years
Poor-Condition Traffic Exposure	21,180 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeI - 59 South over Canoe Creek — 10,585 vehicles/day Oldest Listed BridgeAl - 23 over Norfolk Southern — built in 1924 All County BridgesBrowse every bridge record in St. Clair County.

Top Bridges to Watch in St. Clair County

Bridge	Reason	Condition	Daily Traffic	Year Built
I - 59 South over Canoe Creek	Poor condition + traffic exposure	Poor	10,585	1961
I - 59 North over Canoe Creek	Poor condition + traffic exposure	Poor	10,585	1961
Jones ST over Lil Cahaba Rv	Poor condition + traffic exposure	Poor	10	1978
I - 59 South over Muckleroy Creek	Scour-critical foundation rating	Fair	10,585	1961
I - 59 North over Muckleroy Creek	Scour-critical foundation rating	Fair	10,585	1961
Al - 4 (us 78) over Fishing Creek	Scour-critical foundation rating	Fair	8,520	1964
Al - 53 (us 231) over Broken Arrow Creek	Scour-critical foundation rating	Fair	4,820	1948
I 20 over Little Cahaba River	High traffic	Fair	65,150	1961
I - 20 over Al - 4 ( US 78)	High traffic	Fair	53,023	2005
I20 over Head Springs	High traffic	Fair	51,890	1961

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.