N Robert Wilson Rd over Smith Bayou

Ascension Parish, Louisiana · rated Fair in the 2025 National Bridge Inventory

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

• N Robert Wilson Rd over Smith Bayou in Ascension Parish, Louisiana, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
• Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
• It was built in 1973, making it 52 years old at the 2025 inventory.
• It carries about 120 vehicles a day (traffic count year 2019).
• Its listed owner is the county highway agency.
• It is one of 100 of the 216 inventoried bridges in Ascension Parish rated fair (46.3%); 26 (12.0%) are rated poor.
• 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 → (30.21818, -90.9647)

Component ratings

Bridge details

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

Busiest bridges in Ascension Parish

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

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