ILL 71 AND ILL 23
Carrying ILL 71 AND ILL 23 over IL RV & ACC RD
1 MILE SOUTH US 6, LaSalle, Illinois
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: ILL 71 AND ILL 23
The ILL 71 AND ILL 23 bridge in LaSalle, Illinois carries ILL 71 AND ILL 23 over IL RV & ACC RD. It was built in 1981, making it 45 years old today. The structure is built primarily of steel continuous and spans 3 sections, stretching 369.0 meters (1211 feet) end to end. Daily traffic averages 22,900 vehicles, placing it in the heavily-trafficked tier of Illinois bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 5/9, superstructure at 6/9, substructure at 5/9. The weakest component sits in fair condition. No reported major component scores in the Poor range under the current federal condition thresholds. Its NBI inventory load rating is 30.1 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How ILL 71 AND ILL 23 compares
Live comparison across Illinois.
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 How the historical reference is calculated.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
- 1981
- Material
- Steel Continuous
- Number of Spans
- 3
- Structure Length
- 369.0 m (1211 ft)
- Deck Width
- 23.1 m (76 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 22,900 vehicles/day
- Structure Number
- 050018000000000
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) is in fair condition (5/9), with minor deterioration that may require routine maintenance.
- • At 6/9, the superstructure (beams and supports above the deck) shows fair condition, with minor wear flagged for upkeep.
- • The substructure (piers and abutments) rates fair at 5/9, minor deterioration that routine maintenance should address.
How to read this record
This page shows what the last federal inspection recorded, not whether ILL 71 AND ILL 23 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 ILL 71 AND ILL 23 against other structures in LaSalle and across Illinois. Illinois 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 ILL 71 AND ILL 23?
ILL 71 AND ILL 23 in LaSalle, Illinois has a deck rating of 5/9, superstructure rating of 6/9, and substructure rating of 5/9 on the FHWA's 0–9 scale.
How often is ILL 71 AND ILL 23 inspected?
ILL 71 AND ILL 23'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 22,900 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. ILL 71 AND ILL 23 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 ILL 71 AND ILL 23?
ILL 71 AND ILL 23 has an NBI inventory load rating of 30.1 metric tons.
Who is responsible for maintaining ILL 71 AND ILL 23?
ILL 71 AND ILL 23 is owned and maintained by State Highway Agency.
How old is ILL 71 AND ILL 23 and does age affect safety?
ILL 71 AND ILL 23 was built in 1981, making it 45 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.