18 1/2 MI Road over ST Joseph River
PoorPosted for loadCalhoun County, Michigan · Clarendon Twp Sec 18 · Structure no. 000000000001330
- Built
- 1958
- 67 years old
- Condition
- Poor
- inspected September 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 90 ft
- 2 main spans
- Daily traffic
- 220
- 1995 count
- Owner
- County
- County Highway Agency
About this bridge
18 1/2 MI Road over ST Joseph River is a prestressed concrete box beam or girders - multiple carrying 18 1/2 MI Road over ST Joseph River in Calhoun County, Michigan. It was built in 1958, so it is 67 years old, older than the Michigan average of 48.3 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. Its operating status is: posted for load restriction.
It carries about 220 vehicles a day, roughly 12% of them trucks, projected to reach 394 by 2023. The structure is 90 ft (27.4 m) long and 31 ft wide. If it were closed, the detour would be 6.8 mi (11 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 18 1/2 MI Road over ST Joseph River built?
It was built in 1958, making it 67 years old in 2025.
What condition is 18 1/2 MI Road over ST Joseph River 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 September 2024.
How much traffic does 18 1/2 MI Road over ST Joseph River carry?
About 220 vehicles per day (1995 count), of which roughly 12% are trucks.
How long is 18 1/2 MI Road over ST Joseph River?
The structure is 90 ft (27.4 m) long with a longest span of 45 ft (13.7 m) and a deck 31 ft wide.
Who owns 18 1/2 MI Road over ST Joseph River?
It is owned by the County Highway Agency.