CARBON HILL RD CH3
Carrying CARBON HILL RD CH3 over EAST FK MAZON RIVER
0.91 MI S OF FAS 289, Grundy, Illinois
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: CARBON HILL RD CH3
The CARBON HILL RD CH3 bridge in Grundy, Illinois carries CARBON HILL RD CH3 over EAST FK MAZON RIVER. It was built in 1977, making it 49 years old today. The structure is built primarily of prestressed concrete and spans 2 sections, stretching 48.5 meters (159 feet) end to end. Daily traffic averages 1,550 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 2/9, superstructure at 2/9, substructure at 6/9. The weakest component sits in critical condition. Because at least one major component scores 4 or lower, this bridge falls in FHWA's Poor condition category. That category is not a closure order. Its NBI inventory load rating is 6.2 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How CARBON HILL RD CH3 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 How the historical reference is calculated.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
- 1977
- Material
- Prestressed Concrete
- Number of Spans
- 2
- Structure Length
- 48.5 m (159 ft)
- Deck Width
- 9.4 m (31 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 1,550 vehicles/day
- Structure Number
- 032512100000000
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • At 2/9, the deck (driving surface) is in critical shape, with severe wear requiring urgent action.
- • At 2/9, the superstructure (beams and supports above the deck) is in critical shape, with severe wear requiring urgent action.
- • The substructure (piers and abutments) rates fair at 6/9, minor deterioration that routine maintenance should address.
How to read this record
CARBON HILL RD CH3 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 CARBON HILL RD CH3 against other structures in Grundy 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 CARBON HILL RD CH3?
CARBON HILL RD CH3 in Grundy, Illinois has a deck rating of 2/9, superstructure rating of 2/9, and substructure rating of 6/9 on the FHWA's 0–9 scale.
How often is CARBON HILL RD CH3 inspected?
CARBON HILL RD CH3'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 1,550 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. CARBON HILL RD CH3 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 CARBON HILL RD CH3?
CARBON HILL RD CH3 has an NBI inventory load rating of 6.2 metric tons.
Who is responsible for maintaining CARBON HILL RD CH3?
CARBON HILL RD CH3 is owned and maintained by County Highway Agency.
How old is CARBON HILL RD CH3 and does age affect safety?
CARBON HILL RD CH3 was built in 1977, making it 49 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.