Fau 17 over Chickamauga Creek
Hamilton County, Tennessee · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Fau 17 over Chickamauga Creek in Hamilton County, Tennessee, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1929 and reconstructed in 1981, making it 96 years old at the 2025 inventory.
- It carries about 18,838 vehicles a day (traffic count year 2021).
- Its listed owner is the state highway agency.
- It is one of 238 of the 464 inventoried bridges in Hamilton County rated fair (51.3%); 28 (6.0%) are rated poor.
- Its traffic status in the 2025 inventory is open, posting recommended but not legally implemented (NBI item 41).
- Its class is unchanged from 2024 (fair), but component ratings moved: deck 6 to 5, substructure 6 to 5.
- Status change: its 2024 load posting has been removed.
- Its most recent inspection on record is dated October 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 → (35.08012, -85.2189)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 5 | Fair condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 6 | 5 | Fair condition |
Bridge details
| Structure | Steel through truss |
| Length | about 419 ft |
| Location | 0.72 Mi. W of SR-153 Jct. |
| NBI structure number | 33SR0580013 |
| Condition class | Fair |
| Traffic status (item 41) | Open, posting recommended but not legally implemented |
| Last inspection (item 90) | October 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
| Fracture critical (item 92A) | Yes |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Tennessee department of transportation.
Busiest bridges in Hamilton County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I75 over South Chickamauga Creek | 1960 | 137,904 | Good |
| I75 350029M over CSX Railroad | 1960 | 137,904 | Fair |
| I75 Rp over Small Branch | 1960 | 137,904 | Good |
| I75 over E.brainard Rd (SR 320) | 1960 | 120,984 | Fair |
| I75 Rp over Small Branch | 1960 | 120,984 | Good |
| I24 Exit Rp Fr Wbl over Small Branch | 1960 | 115,412 | Fair |
All bridges nearby: Hamilton County, TN bridge conditions · every bridge in Hamilton County · Tennessee bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.