I-75 SB over Cass River
FairSaginaw County, Michigan · 10.0 MI NW of Genesee CO · Structure no. 000000000009186
- Built
- 1961
- 64 years old, rebuilt 2007
- Condition
- Fair
- inspected April 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 280 ft
- 4 main spans
- Daily traffic
- 25,971
- 2015 count
- Owner
- State
- State Highway Agency
About this bridge
I-75 SB over Cass River is a steel continuous stringer/multi-beam or girder carrying I-75 SB over Cass River in Saginaw County, Michigan. It was built in 1961 and reconstructed in 2007, so it is 64 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 6 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 25,971 vehicles a day, roughly 7% of them trucks, projected to reach 29,867 by 2035. The structure is 280 ft (85.3 m) long and 73 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| 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 I-75 SB over Cass River built?
It was built in 1961, making it 64 years old in 2025. It was reconstructed in 2007.
What condition is I-75 SB over Cass River 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 April 2024.
How much traffic does I-75 SB over Cass River carry?
About 25,971 vehicles per day (2015 count), of which roughly 7% are trucks.
How long is I-75 SB over Cass River?
The structure is 280 ft (85.3 m) long with a longest span of 70 ft (21.3 m) and a deck 73 ft wide.
Who owns I-75 SB over Cass River?
It is owned by the State Highway Agency.