I-75 SB|M-55 EB over Old 76|S Saint Helen RD
FairRoscommon County, Michigan · 9 MI W of West Branch · Structure no. 000000000009018
- Built
- 1971
- 54 years old
- Condition
- Fair
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 162 ft
- 3 main spans
- Daily traffic
- 7,800
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-75 SB|M-55 EB over Old 76|S Saint Helen RD is a steel stringer/multi-beam or girder carrying I-75 SB|M-55 EB over Old 76|S Saint Helen RD in Roscommon County, Michigan. It was built in 1971, so it is 54 years old, older than the Michigan average of 48.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 7,800 vehicles a day, roughly 8% of them trucks, projected to reach 8,600 by 2043. The structure is 162 ft (49.4 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, 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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-75 SB|M-55 EB over Old 76|S Saint Helen RD built?
It was built in 1971, making it 54 years old in 2025.
What condition is I-75 SB|M-55 EB over Old 76|S Saint Helen RD in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2023.
How much traffic does I-75 SB|M-55 EB over Old 76|S Saint Helen RD carry?
About 7,800 vehicles per day (2023 count), of which roughly 8% are trucks.
How long is I-75 SB|M-55 EB over Old 76|S Saint Helen RD?
The structure is 162 ft (49.4 m) long with a longest span of 93 ft (28.3 m) and a deck 44 ft wide.
Who owns I-75 SB|M-55 EB over Old 76|S Saint Helen RD?
It is owned by the State Highway Agency.