Tangipahoa County Bridge Report Card
Tangipahoa County scores 53 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Tangipahoa County, Louisiana
Tangipahoa County has 477 bridges in the National Bridge Inventory, with 59 rated poor and 86 rated scour-critical. Its poor-condition share of 12.4% is above the 11.2% statewide average. Poor-condition bridges carry about 89,321 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Tangipahoa County a Bridge Condition Exposure Score of 53/100 (F). The county has 477 bridges in the National Bridge Inventory, including 59 in poor condition and 86 rated scour-critical. Poor-condition bridges carry about 89,321 daily vehicle crossings. Poor condition does not mean unsafe; bridges judged unsafe are closed or restricted by transportation agencies.
How the Score Breaks Down
| Factor | Weight | County Value | Penalty |
|---|---|---|---|
| Poor-condition bridge share | 40 | 12.4% | 24.7 |
| Poor-condition traffic exposure | 25 | 2.5% of measured traffic | 1.9 |
| Scour-critical bridge share | 20 | 18.0% | 20.0 |
| Average age vs national baseline | 10 | 48 years vs 48 nationally | 0.2 |
| Traffic-data completeness | 5 | 3,522,405 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 | 12.4% |
| State Poor-Condition Share | 11.2% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 18.0% |
| Average Bridge Age | 48 years |
| Poor-Condition Traffic Exposure | 89,321 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Tangipahoa County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| La1040 over Yellow Water River | Poor condition + traffic exposure | Poor | 7,190 | 1958 |
| La0443 over Skulls Creek | Poor condition + traffic exposure | Poor | 6,478 | 1954 |
| La0022 over Tangipahoa River | Poor condition + traffic exposure | Poor | 6,435 | 1939 |
| Old US 51 over Pass Manchac | Poor condition + traffic exposure | Poor | 4,107 | 1957 |
| La0040 over Bull Branch | Poor condition + traffic exposure | Poor | 2,778 | 1957 |
| La0040 over Natalbany River | Poor condition + traffic exposure | Poor | 913 | 1971 |
| Harvey Lavigne over Creek | Poor condition + traffic exposure | Poor | 681 | 1970 |
| Sibley RD over Creek | Poor condition + traffic exposure | Poor | 611 | 1974 |
| Illinois Jones RD over Still Branch | Poor condition + traffic exposure | Poor | 200 | 1975 |
| Byers RD over Bedico Creek | Poor condition + traffic exposure | Poor | 128 | 1993 |
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.