Nfa A256 over Mill Branch
Robertson County, Tennessee · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Nfa A256 over Mill Branch in Robertson County, Tennessee, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
- It was built in 1960, making it 65 years old at the 2025 inventory.
- It carries about 933 vehicles a day (traffic count year 2021).
- Its listed owner is the county highway agency.
- It is one of 143 of the 204 inventoried bridges in Robertson County rated good (70.1%); 2 (1.0%) 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 April 2024, on a 24-month routine inspection cycle.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (36.44722, -86.69085)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 7 | 7 | Good condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 38 ft |
| Location | 1.6 Mi S Jct I65&SR76 |
| NBI structure number | 740A2560001 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | April 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Tennessee department of transportation.
Busiest bridges in Robertson County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I24 over Hollis Creek | 1973 | 75,818 | Good |
| I24 over Mcmahon Hollow Rd | 1972 | 75,818 | Good |
| I24 over Mcmahon Hollow Rd | 1972 | 75,818 | Good |
| I24 over Sycamore Creek | 1972 | 75,818 | Good |
| I24 over Sycamore Creek | 1972 | 75,818 | Good |
| I24 over Passenger Creek | 1973 | 66,659 | Good |
All bridges nearby: Robertson County, TN bridge conditions · every bridge in Robertson County · Tennessee bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.