FAS 631-CTY HWY 31
Carrying FAS 631-CTY HWY 31 over WOLF CREEK
0.5 N OF SPAULDING, Sangamon, Illinois
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: FAS 631-CTY HWY 31
The FAS 631-CTY HWY 31 bridge in Sangamon, Illinois carries FAS 631-CTY HWY 31 over WOLF CREEK. It was built in 1985, making it 41 years old today. The structure is built primarily of concrete and spans 3 sections, stretching 31.1 meters (102 feet) end to end. Daily traffic averages 1,700 vehicles, placing it in the moderately-trafficked tier of Illinois bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show a deck rating of 4/9, superstructure at 4/9, substructure at 6/9. The weakest component sits in poor condition. A component scored 4 or below, placing this bridge in the federal Poor condition category rather than declaring it unsafe or closed. Its NBI inventory load rating is 45.0 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How FAS 631-CTY HWY 31 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 How the historical reference is calculated.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
- 1985
- Material
- Concrete
- Number of Spans
- 3
- Structure Length
- 31.1 m (102 ft)
- Deck Width
- 12.6 m (41 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 1,700 vehicles/day
- Structure Number
- 084342400000000
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) rates poor at 4/9, advanced deterioration that should be prioritized for repair.
- • The superstructure (beams and supports above the deck) rates poor at 4/9, advanced deterioration that should be prioritized for repair.
- • At 6/9, the substructure (piers and abutments) shows fair condition, with minor wear flagged for upkeep.
How to read this record
FAS 631-CTY HWY 31 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 FAS 631-CTY HWY 31 against other structures in Sangamon 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 FAS 631-CTY HWY 31?
FAS 631-CTY HWY 31 in Sangamon, Illinois has a deck rating of 4/9, superstructure rating of 4/9, and substructure rating of 6/9 on the FHWA's 0–9 scale.
How often is FAS 631-CTY HWY 31 inspected?
FAS 631-CTY HWY 31'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 1,700 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. FAS 631-CTY HWY 31 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 FAS 631-CTY HWY 31?
FAS 631-CTY HWY 31 has an NBI inventory load rating of 45.0 metric tons.
Who is responsible for maintaining FAS 631-CTY HWY 31?
FAS 631-CTY HWY 31 is owned and maintained by County Highway Agency.
How old is FAS 631-CTY HWY 31 and does age affect safety?
FAS 631-CTY HWY 31 was built in 1985, making it 41 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.