MAPLE RD/ TR 177
Carrying MAPLE RD/ TR 177 over TR1B TO SILVER CK
1.5MI S HAMEL, Madison, Illinois
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: MAPLE RD/ TR 177
The MAPLE RD/ TR 177 bridge in Madison, Illinois carries MAPLE RD/ TR 177 over TR1B TO SILVER CK. It was built in 1973, making it 53 years old today. The structure is built primarily of steel and spans 2 sections, stretching 11.6 meters (38 feet) end to end. Daily traffic averages 150 vehicles, placing it in the lower-traffic tier of Illinois bridges. It is owned and maintained by Town/Township 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. Its NBI inventory load rating is 33.7 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How MAPLE RD/ TR 177 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 How the historical reference is calculated.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
- 1973
- Material
- Steel
- Number of Spans
- 2
- Structure Length
- 11.6 m (38 ft)
- Owner
- Town/Township Highway Agency
- Avg Daily Traffic
- 150 vehicles/day
- Structure Number
- 060321400000000
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 MAPLE RD/ TR 177 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 MAPLE RD/ TR 177 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 MAPLE RD/ TR 177?
MAPLE RD/ TR 177 in Madison, Illinois on the FHWA's 0–9 scale.
How often is MAPLE RD/ TR 177 inspected?
MAPLE RD/ TR 177'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 150 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. MAPLE RD/ TR 177 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 MAPLE RD/ TR 177?
MAPLE RD/ TR 177 has an NBI inventory load rating of 33.7 metric tons.
Who is responsible for maintaining MAPLE RD/ TR 177?
MAPLE RD/ TR 177 is owned and maintained by Town/Township Highway Agency.
How old is MAPLE RD/ TR 177 and does age affect safety?
MAPLE RD/ TR 177 was built in 1973, making it 53 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.