12th ST over Big Blue Rvr
PoorJackson County, Missouri · S 6 T 49 N R 32 W · Structure no. 25403
- Built
- 1960
- 65 years old
- Condition
- Poor
- inspected March 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 504 ft
- 3 main spans
- Daily traffic
- 1,192
- 2024 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
12th ST over Big Blue Rvr is a steel continuous stringer/multi-beam or girder carrying 12th ST over Big Blue Rvr in Jackson County, Missouri. It was built in 1960, so it is 65 years old, older than the Missouri average of 45.1 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 1,192 vehicles a day, roughly 16% of them trucks, projected to reach 1,550 by 2044. The structure is 504 ft (153.6 m) long and 33 ft wide. If it were closed, the detour would be 0.6 mi (1 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 12th ST over Big Blue Rvr built?
It was built in 1960, making it 65 years old in 2025.
What condition is 12th ST over Big Blue Rvr 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 March 2024.
How much traffic does 12th ST over Big Blue Rvr carry?
About 1,192 vehicles per day (2024 count), of which roughly 16% are trucks.
How long is 12th ST over Big Blue Rvr?
The structure is 504 ft (153.6 m) long with a longest span of 174 ft (53 m) and a deck 33 ft wide.
Who owns 12th ST over Big Blue Rvr?
It is owned by the City or Municipal Highway Agency.