SR 12 over Granny Baker Bayou
PoorWashington County, Mississippi · 2.3 MI E SR 1 · Structure no. 310001207600230
- Built
- 1966
- 59 years old
- Condition
- Poor
- inspected November 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 160 ft
- 2 main spans
- Daily traffic
- 390
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SR 12 over Granny Baker Bayou is a prestressed concrete stringer/multi-beam or girder carrying SR 12 over Granny Baker Bayou in Washington County, Mississippi. It was built in 1966, so it is 59 years old, older than the Mississippi average of 38.9 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 390 vehicles a day, roughly 10% of them trucks, projected to reach 390 by 2043. The structure is 160 ft (48.8 m) long and 30 ft wide. If it were closed, the detour would be 23 mi (37 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SR 12 over Granny Baker Bayou built?
It was built in 1966, making it 59 years old in 2025.
What condition is SR 12 over Granny Baker Bayou in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2024.
How much traffic does SR 12 over Granny Baker Bayou carry?
About 390 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is SR 12 over Granny Baker Bayou?
The structure is 160 ft (48.8 m) long with a longest span of 40 ft (12.2 m) and a deck 30 ft wide.
Who owns SR 12 over Granny Baker Bayou?
It is owned by the State Highway Agency.