I-90 Rampbuchanan over Grand Calumet River
PoorLake County, Indiana · 01.95 E US 12 · Structure no. 046430
- Built
- 1956
- 69 years old, rebuilt 1986
- Condition
- Poor
- inspected July 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 183 ft
- 3 main spans
- Daily traffic
- —
- 2015 count
- Owner
- Toll Authority
- State Toll Authority
About this bridge
I-90 Rampbuchanan over Grand Calumet River is a steel stringer/multi-beam or girder carrying I-90 Rampbuchanan over Grand Calumet River in Lake County, Indiana. It was built in 1956 and reconstructed in 1986, so it is 69 years old, older than the Indiana average of 46.6 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.
No traffic count is recorded. The structure is 183 ft (55.7 m) long and 20 ft wide. If it were closed, the detour would be 0.6 mi (1 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| 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-90 Rampbuchanan over Grand Calumet River built?
It was built in 1956, making it 69 years old in 2025. It was reconstructed in 1986.
What condition is I-90 Rampbuchanan over Grand Calumet 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 July 2023.
How much traffic does I-90 Rampbuchanan over Grand Calumet River carry?
No traffic count is recorded for this structure.
How long is I-90 Rampbuchanan over Grand Calumet River?
The structure is 183 ft (55.7 m) long with a longest span of 70 ft (21.3 m) and a deck 20 ft wide.
Who owns I-90 Rampbuchanan over Grand Calumet River?
It is owned by the State Toll Authority.