I 55 over Big Black River
FairMadison County, Mississippi · 3.7 MI N SR 16 · Structure no. 11000550451269A
- Built
- 1969
- 56 years old
- Condition
- Fair
- inspected April 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 350 ft
- 3 main spans
- Daily traffic
- 10,000
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I 55 over Big Black River is a prestressed concrete stringer/multi-beam or girder carrying I 55 over Big Black River in Madison County, Mississippi. It was built in 1969, so it is 56 years old, older than the Mississippi average of 38.9 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 10,000 vehicles a day, roughly 24% of them trucks, projected to reach 11,500 by 2043. The structure is 350 ft (106.7 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 | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I 55 over Big Black River built?
It was built in 1969, making it 56 years old in 2025.
What condition is I 55 over Big Black River 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 April 2024.
How much traffic does I 55 over Big Black River carry?
About 10,000 vehicles per day (2023 count), of which roughly 24% are trucks.
How long is I 55 over Big Black River?
The structure is 350 ft (106.7 m) long with a longest span of 90 ft (27.4 m) and a deck 44 ft wide.
Who owns I 55 over Big Black River?
It is owned by the State Highway Agency.