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Bridge conditions in St. Charles Parish, Louisiana

82 inventoried bridges · 1 rated poor · 2025 National Bridge Inventory

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

St. Charles Parish tracks close to typical: 1 of its 82 inventoried bridges (1.2%) are rated poor, against a national rate of about 7%.

1 of the 82 bridges in St. Charles Parish, Louisiana, are rated in poor condition (1.2%) in the 2025 National Bridge Inventory, as of August 20, 2026.
49 bridges (59.8%) are rated good and 32 (39.0%) fair.
The median St. Charles Parish bridge was built in 1986.
The busiest poor-rated bridge is LA0631 over Drain Canal (built 1962), carrying about 1,544 vehicles a day.

Good 59.8% · Fair 39.0% · Poor 1.2% of 82 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
LA0631 over Drain Canal	1962	1,544	Poor

Busiest bridges in the county

Bridge	Built	Vehicles/day	Condition
I0310 over Swamp	1992	56,783	Good
US0090 over Drain Ditch	1999	49,920	Good
US0090 over US 90 Turnarounds	2013	49,920	Good
US0090 over Davis Pond Diversion	2002	49,920	Good
US0090 over Drain Canal	1953	49,920	Fair
US0090 over Sellers Canal	1953	49,920	Fair
I0010 over Bonnet Carre Spillway	1972	48,723	Fair
I0310 over Pipeline	1991	47,396	Good
I0310 over Icg.rr Ramp E F &h LA4	1983	47,396	Fair
I0310 over Mississippi River	1983	47,396	Fair

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

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.