US 90 over Nine Mile Bayou
GoodJackson County, Mississippi · 5.7 MI E SR 63 · Structure no. 21000900300805A
- Built
- 1971
- 54 years old
- Condition
- Good
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 270 ft
- 9 main spans
- Daily traffic
- 6,500
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 90 over Nine Mile Bayou is a prestressed concrete stringer/multi-beam or girder carrying US 90 over Nine Mile Bayou in Jackson County, Mississippi. It was built in 1971, so it is 54 years old, older than the Mississippi average of 38.9 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 6,500 vehicles a day, roughly 6% of them trucks, projected to reach 7,000 by 2043. The structure is 270 ft (82.3 m) long and 42 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| 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 US 90 over Nine Mile Bayou built?
It was built in 1971, making it 54 years old in 2025.
What condition is US 90 over Nine Mile Bayou 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 August 2023.
How much traffic does US 90 over Nine Mile Bayou carry?
About 6,500 vehicles per day (2023 count), of which roughly 6% are trucks.
How long is US 90 over Nine Mile Bayou?
The structure is 270 ft (82.3 m) long with a longest span of 30 ft (9.1 m) and a deck 42 ft wide.
Who owns US 90 over Nine Mile Bayou?
It is owned by the State Highway Agency.