Nfa A177 over Duck River

Maury County, Tennessee · rated Fair in the 2025 National Bridge Inventory

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

• Nfa A177 over Duck River in Maury County, Tennessee, 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 1962, making it 63 years old at the 2025 inventory.
• It carries about 130 vehicles a day (traffic count year 2020).
• Its listed owner is the county highway agency.
• It is one of 230 of the 424 inventoried bridges in Maury County rated fair (54.2%); 25 (5.9%) are rated poor.
• Its traffic status in the 2025 inventory is posted for load (NBI item 41).
• Its class is unchanged from 2024 (fair), but component ratings moved: deck 5 to 6, superstructure 5 to 6.
• Its most recent inspection on record is dated May 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 → (35.61763, -86.8659)

Component ratings

Bridge details

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

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