I 840 over Tributary to S Harpeth C
FairWilliamson County, Tennessee · Near SR-46 · Structure no. 94SR8400096
- Built
- 2009
- 16 years old
- Condition
- Fair
- inspected January 2025
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 891 ft
- 7 main spans
- Daily traffic
- 25,335
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
I 840 over Tributary to S Harpeth C is a prestressed concrete continuous stringer/multi-beam or girder carrying I 840 over Tributary to S Harpeth C in Williamson County, Tennessee. It was built in 2009, so it is 16 years old, younger than the Tennessee average of 47.4 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 25,335 vehicles a day, roughly 7% of them trucks, projected to reach 34,048 by 2041. The structure is 891 ft (271.6 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I 840 over Tributary to S Harpeth C built?
It was built in 2009, making it 16 years old in 2025.
What condition is I 840 over Tributary to S Harpeth C in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in January 2025.
How much traffic does I 840 over Tributary to S Harpeth C carry?
About 25,335 vehicles per day (2021 count), of which roughly 7% are trucks.
How long is I 840 over Tributary to S Harpeth C?
The structure is 891 ft (271.6 m) long with a longest span of 133 ft (40.5 m) and a deck 44 ft wide.
Who owns I 840 over Tributary to S Harpeth C?
It is owned by the State Highway Agency.