Ascension County Bridge Report Card
Ascension County scores 62 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Ascension County, Louisiana
Ascension County has 216 bridges in the National Bridge Inventory, with 26 rated poor and 13 rated scour-critical. Its poor-condition share of 12.0% is above the 11.2% statewide average. Poor-condition bridges carry about 84,841 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Ascension County a Bridge Condition Exposure Score of 62/100 (D). The county has 216 bridges in the National Bridge Inventory, including 26 in poor condition and 13 rated scour-critical. Poor-condition bridges carry about 84,841 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 | 12.0% | 24.1 |
| Poor-condition traffic exposure | 25 | 3.1% of measured traffic | 2.3 |
| Scour-critical bridge share | 20 | 6.0% | 12.0 |
| Average age vs national baseline | 10 | 44 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 2,710,431 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 | 12.0% |
| State Poor-Condition Share | 11.2% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 6.0% |
| Average Bridge Age | 44 years |
| Poor-Condition Traffic Exposure | 84,841 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Ascension County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| La0427 over Bayou Manchac | Poor condition + traffic exposure | Poor | 11,384 | 1972 |
| La0431 over Black Bayou | Poor condition + traffic exposure | Poor | 9,608 | 1983 |
| La0934 over Black Bayou | Poor condition + traffic exposure | Poor | 5,367 | 1971 |
| Joe Sevario RD over Sides Bayou | Poor condition + traffic exposure | Poor | 700 | 1969 |
| E Lanoux RD over New River Canal | Poor condition + traffic exposure | Poor | 25 | 1994 |
| Boyce Tower RD over Conway Bayou | Poor condition + traffic exposure | Poor | 5 | 1965 |
| La0431 over Villar Canal | Poor condition + traffic exposure | Poor | 9,608 | 1971 |
| La0431 over Villar Drainage | Poor condition + traffic exposure | Poor | 9,608 | 1971 |
| La0431 over New River | Poor condition + traffic exposure | Poor | 9,608 | 1982 |
| La0621 over Black Bayou | Poor condition + traffic exposure | Poor | 7,519 | 1971 |
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.