St. Martin County Bridge Report Card

St. Martin County scores 74 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

C74 / 100

Local infrastructure snapshot

St. Martin County, Louisiana

St. Martin County has 117 bridges in the National Bridge Inventory, with 10 rated poor and 5 rated scour-critical. Its poor-condition share of 8.5% is at or below the 11.2% statewide average. Poor-condition bridges carry about 9,022 daily vehicle crossings.

117Total Bridges

10Poor (8.5%)

61Fair (52.1%)

5Scour-Critical

Quote-Ready Local Facts

8.5%of county bridges are in poor condition, compared with 11.2% statewide and 6.7% nationally.

9,022daily vehicle crossings are on poor-condition bridges in the county.

5bridges are rated scour-critical, or 4.3% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives St. Martin County a Bridge Condition Exposure Score of 74/100 (C). The county has 117 bridges in the National Bridge Inventory, including 10 in poor condition and 5 rated scour-critical. Poor-condition bridges carry about 9,022 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	8.5%	17.1
Poor-condition traffic exposure	25	1.1% of measured traffic	0.9
Scour-critical bridge share	20	4.3%	8.5
Average age vs national baseline	10	45 years vs 48 nationally	0.0
Traffic-data completeness	5	788,341 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	8.5%
State Poor-Condition Share	11.2%
National Poor-Condition Share	6.7%
County Scour-Critical Share	4.3%
Average Bridge Age	45 years
Poor-Condition Traffic Exposure	9,022 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeLa0350 over Bayou Teche Parks — 3,378 vehicles/day Oldest Listed BridgeLa0182 over Lasalle Coulee — built in 1931 All County BridgesBrowse every bridge record in St. Martin County.

Top Bridges to Watch in St. Martin County

Bridge	Reason	Condition	Daily Traffic	Year Built
La0352 over Bayou Amy	Poor condition + traffic exposure	Poor	2,711	1968
La0350 over Bayou Teche Parks	Poor condition + traffic exposure	Poor	3,378	1950
Sawmill Rd. over Coulee Datider	Poor condition + traffic exposure	Poor	1,100	1975
I0010 over Ramp B. Off Ramp	Poor condition + traffic exposure	Poor	970	1971
La0975 over Creek	Poor condition + traffic exposure	Poor	231	1968
La0975 over Creek	Poor condition + traffic exposure	Poor	231	1968
Ches Courville RD over Nicole Coulee	Poor condition + traffic exposure	Poor	166	1975
Division RD over Coulee Du Portage	Poor condition + traffic exposure	Poor	129	1965
Lake Fausse ST Pk over Lake Fausse Point	Poor condition + traffic exposure	Poor	66	1980
Auguillard RD over Coulee	Poor condition + traffic exposure	Poor	40	1975

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.