Co. Hwy. 29 over Cahaba River
Shelby County, Alabama · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Co. Hwy. 29 over Cahaba River in Shelby County, Alabama, 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 1961, making it 64 years old at the 2025 inventory.
- It carries about 16,152 vehicles a day (traffic count year 2023).
- Its listed owner is the county highway agency.
- It is one of 201 of the 343 inventoried bridges in Shelby County rated fair (58.6%); 3 (0.9%) 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 September 2023, on a 24-month routine inspection cycle.
- 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 → (33.41588, -86.74026)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 224 ft |
| Location | 300 Ft. So. Jeff Co Line |
| NBI structure number | 007390 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | September 2023 |
| 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 Alabama department of transportation.
Busiest bridges in Shelby County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I - 65 over Bishop Creek | 1980 | 83,600 | Fair |
| I65 over Hogpen Creek | 1979 | 77,840 | Fair |
| I - 65 over Buck Ck | 1959 | 57,460 | Fair |
| I - 65 South over Cahaba River | 1978 | 56,815 | Fair |
| I - 65 North over Cahaba River | 1978 | 56,815 | Fair |
| I - 65 South over Co Rd 17 | 1980 | 47,910 | Fair |
All bridges nearby: Shelby County, AL bridge conditions · every bridge in Shelby County · Alabama bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.