I840 over I840/957 Spencer Mill
GoodWilliamson County, Tennessee · 0.5 MI NW JCT.SR46&SR100 · Structure no. 94SR8400001
- Built
- 2001
- 24 years old
- Condition
- Good
- inspected November 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 205 ft
- 3 main spans
- Daily traffic
- 14,056
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
I840 over I840/957 Spencer Mill is a prestressed concrete continuous stringer/multi-beam or girder carrying I840 over I840/957 Spencer Mill in Williamson County, Tennessee. It was built in 2001, so it is 24 years old, younger than the Tennessee average of 47.4 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 14,056 vehicles a day, roughly 7% of them trucks, projected to reach 29,168 by 2041. The structure is 205 ft (62.5 m) long and 44 ft wide. If it were closed, the detour would be 8.1 mi (13 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I840 over I840/957 Spencer Mill built?
It was built in 2001, making it 24 years old in 2025.
What condition is I840 over I840/957 Spencer Mill in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2024.
How much traffic does I840 over I840/957 Spencer Mill carry?
About 14,056 vehicles per day (2021 count), of which roughly 7% are trucks.
How long is I840 over I840/957 Spencer Mill?
The structure is 205 ft (62.5 m) long with a longest span of 80 ft (24.4 m) and a deck 44 ft wide.
Who owns I840 over I840/957 Spencer Mill?
It is owned by the State Highway Agency.