IL 255 (FAP 310)
Carrying IL 255 (FAP 310) over STREAM
0.17MI N MADISON AVE, Madison, Illinois
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
IL 255 (FAP 310) in Madison, Illinois is rated Good in the FHWA's 2024 National Bridge Inventory.
Built in 1998, it carries 1 rated component on the inspecting agency's 0-9 scale, and its weakest reported component scores 7. The lowest applicable rating sets the federal condition category, so this Good result describes the weakest reported component rather than the structure as a whole. No NBI category is a closure decision or a live crossing-safety verdict.
NBI record plate
Structure IL:060203200000000
LATE-CENTURY · CONCRETE · MULTI-SPAN · CULVERT-LED · HEAVY-ADT · STANDARD-LOAD · CAT-GOOD
- LATE-CENTURY 1980–1999
- CONCRETE Concrete
- MULTI-SPAN 3 spans
- CULVERT-LED Culvert-led
- HEAVY-ADT Heavy ADT
- STANDARD-LOAD Standard load
- CAT-GOOD Good
Inspection-sheet codes from this record’s year, material family, spans, controlling component, ADT, inventory load, and NBI category, not a live closure verdict.
Bridge Snapshot: IL 255 (FAP 310)
The IL 255 (FAP 310) bridge in Madison, Illinois carries IL 255 (FAP 310) over STREAM. It was built in 1998, making it 28 years old today. The structure is built primarily of concrete continuous and spans 3 sections, stretching 8.1 meters (27 feet) end to end. Daily traffic averages 25,700 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 culvert at 7/9. The weakest component sits in good condition. All reported major components score above the Poor range.
How IL 255 (FAP 310) compares
Age against the county: built in 1998, earlier than 126 of Madison's 523 bridges with a recorded construction year (24%), against a county median build year of 1984. This is one of the newer structures in its county.
Live comparison across Illinois bridges with a recorded inventory load rating (26,904 of 26,928 rated).
IL 255 (FAP 310) vs every rated Illinois bridge
Inventory load rating (metric tons), FHWA NBI, this state
32 Top 76% higher than 24% of 26,904 bridges
rated Illinois bridges, bucketed by value
Each bar is a band; taller bars hold more bridges. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source FHWA National Bridge Inventory · August 2026
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Madison inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 523 bridges in this county. Orthogonal to this structure's component profile above: a county catalog share, not a live crossing-safety verdict.
Structural Details
- Year Built
- 1998
- Material
- Concrete Continuous
- Number of Spans
- 3
- Structure Length
- 8.1 m (27 ft) 0
- Owner
- State Highway Agency
- Avg Daily Traffic
- 25,700 vehicles/day
- Structure Number
- 060203200000000
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 IL 255 (FAP 310) 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 IL 255 (FAP 310) against other structures in Madison 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 IL 255 (FAP 310)?
IL 255 (FAP 310) in Madison, Illinois on the FHWA's 0–9 scale.
How often is IL 255 (FAP 310) inspected?
IL 255 (FAP 310)'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 25,700 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. IL 255 (FAP 310) is currently shown as Good condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for IL 255 (FAP 310)?
IL 255 (FAP 310) has an NBI inventory load rating of 32.4 metric tons.
Who is responsible for maintaining IL 255 (FAP 310)?
IL 255 (FAP 310) is owned and maintained by State Highway Agency.
How old is IL 255 (FAP 310) and does age affect safety?
IL 255 (FAP 310) was built in 1998, making it 28 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.
Share this inspection record
Send this source-bounded record or download its data card. An NBI condition category is not a closure or live crossing-safety verdict.
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. Component ratings, ADT, and condition category on this page are copied from the NBI record for this structure; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2024 NBI release. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.