Trist Road over Portage River S Br
PoorPosted for loadJackson County, Michigan · 0.5 MI S 3 M W Waterloo · Structure no. 000000000004508
- Built
- 1939
- 86 years old
- Condition
- Poor
- inspected March 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 25 ft
- 1 main span
- Daily traffic
- 624
- 2012 count
- Owner
- County
- County Highway Agency
About this bridge
Trist Road over Portage River S Br is a steel stringer/multi-beam or girder carrying Trist Road over Portage River S Br in Jackson County, Michigan. It was built in 1939, so it is 86 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 3 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 624 vehicles a day, projected to reach 175 by 2020. The structure is 25 ft (7.6 m) long and 29 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Trist Road over Portage River S Br built?
It was built in 1939, making it 86 years old in 2025.
What condition is Trist Road over Portage River S Br 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 Trist Road over Portage River S Br carry?
About 624 vehicles per day (2012 count).
How long is Trist Road over Portage River S Br?
The structure is 25 ft (7.6 m) long with a longest span of 23 ft (7 m) and a deck 29 ft wide.
Who owns Trist Road over Portage River S Br?
It is owned by the County Highway Agency.