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Bridge conditions in Ascension Parish, Louisiana

216 inventoried bridges · 26 rated poor · 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

Ascension Parish has 26 bridges rated poor out of 216 inventoried, a 12.0% share that puts it well above the national rate of about 7%.

26 of the 216 bridges in Ascension Parish, Louisiana, are rated in poor condition (12.0%) in the 2025 National Bridge Inventory, as of August 20, 2026.
90 bridges (41.7%) are rated good and 100 (46.3%) fair.
The median Ascension Parish bridge was built in 1978.
The busiest poor-rated bridge is LA0427 over Bayou Manchac (built 1972), carrying about 11,384 vehicles a day.

Good 41.7% · Fair 46.3% · Poor 12.0% of 216 bridges

Bridges rated poor

Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.

Bridge	Built	Vehicles/day	Condition
LA0427 over Bayou Manchac	1972	11,384	Poor
LA0431 over New River	1982	9,608	Poor
LA0431 over Black Bayou	1983	9,608	Poor
LA0431 over Villar Canal	1971	9,608	Poor
LA0431 over Villar Drainage	1971	9,608	Poor
LA0621 over Black Bayou	1971	7,519	Poor
LA0933 over Henderson Bayou	1969	6,131	Poor
LA0928 over Jim Bayou	1966	5,446	Poor
LA0934 over Black Bayou	1971	5,367	Poor
LA0935 over Black Bayou	1974	4,835	Poor
LA0308 over Belle Terre Canal	1963	1,349	Poor
Joe Sevario Rd over Sides Bayou	1969	700	Poor
Joe Sevario Rd over Henderson Bayou	1969	700	Poor
Beco Rd over Duck Roost Bayou	1994	500	Poor
Braud Rd over Black Bayou	1980	500	Poor
LA0943 over Bayou Mccall	1972	350	Poor
Henderson Bayou Rd over Henderson Bayou	1990	300	Poor
K C Rd over Bayou Narcisse	1970	250	Poor
Summerfield Rd over Lake Villars	1975	250	Poor
Summerfield Rd over Lake Villaks	1975	250	Poor
Devall Rd over Drainage Bayou	1970	200	Poor
Muddy Creek Rd over Muddy Creek	1978	150	Poor
Harry Savoy Rd over Drainage Bayou	1993	100	Poor
Pr 944 over Bayou Mccall	1972	98	Poor
E Lanoux Rd over New River Canal	1994	25	Poor
Boyce Tower Rd over Conway Bayou	1965	5	Poor

Busiest bridges in the county

Bridge	Built	Vehicles/day	Condition
I0010 over Drain	1975	60,802	Fair
I0010 over La 73	1975	60,802	Fair
I0010 over Drain	1975	60,802	Good
I0010 over Drain	1975	60,802	Good
I0010 over LA429/Cornerview Rd	1975	60,802	Fair
I0010 over Drain	1975	60,802	Good
I0010 over Smith Bayou	1975	60,802	Fair
I0010 over La 30	1975	60,802	Fair
I0010 over Drain	1975	60,802	Fair
I0010 over Boyle Bayou	1979	60,802	Fair

Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.

Every bridge in Ascension Parish → - all 216, busiest first, each with its own condition record.

All of Louisiana: Louisiana bridge conditions by county · every download on the data page.

Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.