KEYSER RD - TR 310
Carrying KEYSER RD - TR 310 over LITTLE MACKINAW R.
SW-34-T24NR2W, Tazewell, Illinois
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: KEYSER RD - TR 310
The KEYSER RD - TR 310 bridge in Tazewell, Illinois carries KEYSER RD - TR 310 over LITTLE MACKINAW R.. It was built in 1972, making it 54 years old today. The structure is built primarily of prestressed concrete and spans 1 section, stretching 14.3 meters (47 feet) end to end. Daily traffic averages 100 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 5/9, superstructure at 5/9, substructure at 6/9. 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 41.8 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How KEYSER RD - TR 310 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 How the historical reference is calculated.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
- 1972
- Material
- Prestressed Concrete
- Number of Spans
- 1
- Structure Length
- 14.3 m (47 ft)
- Deck Width
- 9.8 m (32 ft)
- Owner
- Town/Township Highway Agency
- Avg Daily Traffic
- 100 vehicles/day
- Structure Number
- 090316800000000
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 5/9, 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 6/9, minor deterioration that routine maintenance should address.
How to read this record
This page shows what the last federal inspection recorded, not whether KEYSER RD - TR 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 KEYSER RD - TR 310 against other structures in Tazewell 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 KEYSER RD - TR 310?
KEYSER RD - TR 310 in Tazewell, Illinois has a deck rating of 5/9, superstructure rating of 5/9, and substructure rating of 6/9 on the FHWA's 0–9 scale.
How often is KEYSER RD - TR 310 inspected?
KEYSER RD - TR 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 100 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. KEYSER RD - TR 310 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 KEYSER RD - TR 310?
KEYSER RD - TR 310 has an NBI inventory load rating of 41.8 metric tons.
Who is responsible for maintaining KEYSER RD - TR 310?
KEYSER RD - TR 310 is owned and maintained by Town/Township Highway Agency.
How old is KEYSER RD - TR 310 and does age affect safety?
KEYSER RD - TR 310 was built in 1972, making it 54 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.