TR208K(TWIN BRIDGE
Carrying TR208K(TWIN BRIDGE over BIG CREEK
NE EDGE MT ZION, Macon, Illinois
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: TR208K(TWIN BRIDGE
The TR208K(TWIN BRIDGE bridge in Macon, Illinois carries TR208K(TWIN BRIDGE over BIG CREEK. It was built in 1967, making it 59 years old today. The structure is built primarily of prestressed concrete and spans 3 sections, stretching 44.4 meters (146 feet) end to end. Daily traffic averages 375 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 a deck rating of 3/9, superstructure at 3/9, substructure at 5/9. The weakest component sits in poor condition. At least one major component here scores 4 or below, which produces a Poor condition classification under FHWA's current reporting rules. Its NBI inventory load rating is 1.9 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How TR208K(TWIN BRIDGE 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 How the historical reference is calculated.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
- 1967
- Material
- Prestressed Concrete
- Number of Spans
- 3
- Structure Length
- 44.4 m (146 ft)
- Deck Width
- 8.0 m (26 ft)
- Owner
- Town/Township Highway Agency
- Avg Daily Traffic
- 375 vehicles/day
- Structure Number
- 058315200000000
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) rates poor at 3/9, advanced deterioration that should be prioritized for repair.
- • The superstructure (beams and supports above the deck) rates poor at 3/9, advanced deterioration that should be prioritized for repair.
- • The substructure (piers and abutments) rates fair at 5/9, minor deterioration that routine maintenance should address.
How to read this record
TR208K(TWIN BRIDGE is in the federal Poor condition category. That is a component-based result, not a closure order.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Understand what Poor condition does and does not mean before drawing conclusions. Poor condition explained
- Compare TR208K(TWIN BRIDGE against other structures in Macon 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 TR208K(TWIN BRIDGE?
TR208K(TWIN BRIDGE in Macon, Illinois has a deck rating of 3/9, superstructure rating of 3/9, and substructure rating of 5/9 on the FHWA's 0–9 scale.
How often is TR208K(TWIN BRIDGE inspected?
TR208K(TWIN BRIDGE'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 375 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. TR208K(TWIN BRIDGE is currently shown as Poor condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for TR208K(TWIN BRIDGE?
TR208K(TWIN BRIDGE has an NBI inventory load rating of 1.9 metric tons.
Who is responsible for maintaining TR208K(TWIN BRIDGE?
TR208K(TWIN BRIDGE is owned and maintained by Town/Township Highway Agency.
How old is TR208K(TWIN BRIDGE and does age affect safety?
TR208K(TWIN BRIDGE was built in 1967, making it 59 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.