I0010 over Bonnet Carre Spillway

St. Charles Parish, Louisiana · rated Fair in the 2025 National Bridge Inventory

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

• I0010 over Bonnet Carre Spillway in St. Charles Parish, Louisiana, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
• Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
• It was built in 1972, making it 53 years old at the 2025 inventory.
• It carries about 32,050 vehicles a day (traffic count year 2016).
• Its listed owner is the state highway agency.
• It is one of 32 of the 82 inventoried bridges in St. Charles Parish rated fair (39.0%); 1 (1.2%) are rated poor.
• Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
• Its condition class and component ratings are unchanged from the 2024 inventory.
• Its most recent inspection on record is dated November 2024, on a 24-month routine inspection cycle.
• It has fracture-critical members (NBI item 92A): steel tension members without a redundant load path, which get their own scheduled inspections.
• A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

View this bridge on a map → (30.00675, -90.2801)

Component ratings

Bridge details

Source: FHWA National Bridge Inventory, 2025 data as reported by the Louisiana department of transportation.

Busiest bridges in St. Charles Parish

All bridges nearby: St. Charles Parish, LA bridge conditions · every bridge in St. Charles Parish · Louisiana bridges.

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