TWP RD 49A
Carrying TWP RD 49A over I 57
1.59 MI S CLIFTON IN, Iroquois, Illinois
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: TWP RD 49A
The TWP RD 49A bridge in Iroquois, Illinois carries TWP RD 49A over I 57. It was built in 1966, making it 60 years old today. The structure is built primarily of steel continuous. Daily traffic averages 18,400 vehicles, placing it in the heavily-trafficked tier of Illinois bridges.
The latest FHWA inspection records show limited component ratings on file. The weakest component sits in unrated condition. None of this bridge's reported major components fall into the Poor condition range.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How TWP RD 49A 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 How the historical reference is calculated.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
- 1966
- Material
- Steel Continuous
- Avg Daily Traffic
- 18,400 vehicles/day
- Structure Number
- 038012800000000
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
This page shows what the last federal inspection recorded, not whether TWP RD 49A 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 TWP RD 49A against other structures in Iroquois 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 TWP RD 49A?
TWP RD 49A in Iroquois, Illinois on the FHWA's 0–9 scale.
How often is TWP RD 49A inspected?
TWP RD 49A'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 18,400 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. TWP RD 49A is currently shown as unrated condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for TWP RD 49A?
An inventory load rating is not recorded for TWP RD 49A.
Who is responsible for maintaining TWP RD 49A?
Ownership is not specified for TWP RD 49A in the NBI.
How old is TWP RD 49A and does age affect safety?
TWP RD 49A was built in 1966, making it 60 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.