I 90 FRONTAGE RD
Carrying I 90 FRONTAGE RD over BIGHORN RIVER
1M E HARDIN, Big Horn, Montana
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: I 90 FRONTAGE RD
The I 90 FRONTAGE RD bridge in Big Horn, Montana carries I 90 FRONTAGE RD over BIGHORN RIVER. It was built in 2007, making it 19 years old today. The structure is built primarily of steel continuous and spans 3 sections, stretching 180.0 meters (591 feet) end to end. Daily traffic averages 1,537 vehicles, placing it in the moderately-trafficked tier of Montana bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 6/9, superstructure at 7/9, substructure at 6/9. The weakest component sits in fair condition. All reported major components score above the Poor range. Its NBI inventory load rating is 50.8 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How I 90 FRONTAGE RD compares
Live comparison across Montana.
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 How the historical reference is calculated.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
- 2007
- Material
- Steel Continuous
- Number of Spans
- 3
- Structure Length
- 180.0 m (591 ft)
- Deck Width
- 10.3 m (34 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 1,537 vehicles/day
- Structure Number
- S00384000+05101
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • At 6/9, the deck (driving surface) shows fair condition, with minor wear flagged for upkeep.
- • The superstructure (beams and supports above the deck) is in good condition (7/9), showing no significant deterioration.
- • The substructure (piers and abutments) is in fair condition (6/9), with minor deterioration that may require routine maintenance.
How to read this record
This page shows what the last federal inspection recorded, not whether I 90 FRONTAGE RD is safe to cross today. Here is how to use it.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Learn how the 0–9 condition scale and Good/Fair/Poor categories are defined. How condition ratings work
- Compare I 90 FRONTAGE RD against other structures in Big Horn and across Montana. Montana 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 FRONTAGE RD?
I 90 FRONTAGE RD in Big Horn, Montana has a deck rating of 6/9, superstructure rating of 7/9, and substructure rating of 6/9 on the FHWA's 0–9 scale.
How often is I 90 FRONTAGE RD inspected?
I 90 FRONTAGE RD's responsible agency sets its routine interval under FHWA's risk-based inspection rules; this page does not expose the scheduled interval. It carries about 1,537 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. I 90 FRONTAGE RD is currently shown as Fair condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for I 90 FRONTAGE RD?
I 90 FRONTAGE RD has an NBI inventory load rating of 50.8 metric tons.
Who is responsible for maintaining I 90 FRONTAGE RD?
I 90 FRONTAGE RD is owned and maintained by State Highway Agency.
How old is I 90 FRONTAGE RD and does age affect safety?
I 90 FRONTAGE RD was built in 2007, making it 19 years old.
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.