I-90 RAMP/BUCHANAN
Carrying I-90 RAMP/BUCHANAN over GRAND CALUMET RIVER
01.95 E US 12, Lake, Indiana
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: I-90 RAMP/BUCHANAN
The I-90 RAMP/BUCHANAN bridge in Lake, Indiana carries I-90 RAMP/BUCHANAN over GRAND CALUMET RIVER. It was built in 1956, making it 70 years old today. It was last reconstructed in 1986, extending its service life. The structure is built primarily of steel and spans 3 sections, stretching 55.8 meters (183 feet) end to end. Average daily traffic is not reported for this structure. It is owned and maintained by State Toll Authority.
The latest FHWA inspection records show a deck rating of 6/9, superstructure at 4/9, substructure at 6/9. The weakest component sits in poor condition. At least one major component here scores 4 or below, which produces a Poor condition classification under FHWA's current reporting rules. Its NBI inventory load rating is 28.5 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How I-90 RAMP/BUCHANAN compares
Live comparison across Indiana.
Historical Sufficiency Rating
PlainBridge-computedFHWA discontinued this calculated item; it does not determine current condition, funding eligibility, posting, or closure. How the historical reference is calculated.
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Structural Details
- Year Built
- 1956
- Last Reconstructed
- 1986
- Material
- Steel
- Number of Spans
- 3
- Structure Length
- 55.8 m (183 ft)
- Deck Width
- 6.2 m (20 ft)
- Owner
- State Toll Authority
- Structure Number
- 046430
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) rates fair at 6/9, minor deterioration that routine maintenance should address.
- • The superstructure (beams and supports above the deck) is in poor condition (4/9), showing advanced deterioration that may require priority repair.
- • The substructure (piers and abutments) is in fair condition (6/9), with minor deterioration that may require routine maintenance.
How to read this record
I-90 RAMP/BUCHANAN is in the federal Poor condition category. That is a component-based result, not a closure order.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Understand what Poor condition does and does not mean before drawing conclusions. Poor condition explained
- Compare I-90 RAMP/BUCHANAN against other structures in Lake and across Indiana. Indiana bridges
- Noticed visible damage or a safety concern? Report it to the agency that owns the bridge, or call 911 in an emergency. How to report a bridge
Condition codes come straight from the FHWA National Bridge Inventory and are not a real-time safety judgment. Only the owning agency, a state DOT, county, or other owner, can post, restrict, or close a bridge.
Frequently Asked Questions
What do the condition ratings mean for I-90 RAMP/BUCHANAN?
I-90 RAMP/BUCHANAN in Lake, Indiana has a deck rating of 6/9, superstructure rating of 4/9, and substructure rating of 6/9 on the FHWA's 0–9 scale.
How often is I-90 RAMP/BUCHANAN inspected?
I-90 RAMP/BUCHANAN's responsible agency sets its routine interval under FHWA's risk-based inspection rules; this page does not expose the scheduled interval.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. I-90 RAMP/BUCHANAN is currently shown as Poor condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for I-90 RAMP/BUCHANAN?
I-90 RAMP/BUCHANAN has an NBI inventory load rating of 28.5 metric tons.
Who is responsible for maintaining I-90 RAMP/BUCHANAN?
I-90 RAMP/BUCHANAN is owned and maintained by State Toll Authority.
How old is I-90 RAMP/BUCHANAN and does age affect safety?
I-90 RAMP/BUCHANAN was built in 1956, making it 70 years old and last reconstructed in 1986.
Disclaimer: Bridge condition data is from the FHWA NBI and reflects the last reported inspection. A Poor condition rating is not a live declaration that a bridge is closed or unsafe for travel. For current closure, posting, or safety information, contact the responsible transportation agency.
Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.