I-75 NB over Lake State RR
PoorCrawford County, Michigan · 0.5 MI S of M-72 · Structure no. 000000000002033
- Built
- 1961
- 64 years old, rebuilt 1991
- Condition
- Poor
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 141 ft
- 3 main spans
- Daily traffic
- 5,877
- 2007 count
- Owner
- State
- State Highway Agency
About this bridge
I-75 NB over Lake State RR is a steel stringer/multi-beam or girder carrying I-75 NB over Lake State RR in Crawford County, Michigan. It was built in 1961 and reconstructed in 1991, 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 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.
It carries about 5,877 vehicles a day, roughly 12% of them trucks, projected to reach 10,388 by 2018. The structure is 141 ft (43.1 m) long and 47 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 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-75 NB over Lake State RR built?
It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1991.
What condition is I-75 NB over Lake State RR 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 I-75 NB over Lake State RR carry?
About 5,877 vehicles per day (2007 count), of which roughly 12% are trucks.
How long is I-75 NB over Lake State RR?
The structure is 141 ft (43.1 m) long with a longest span of 47 ft (14.2 m) and a deck 47 ft wide.
Who owns I-75 NB over Lake State RR?
It is owned by the State Highway Agency.