IL 121 (FAP 773)
Carrying IL 121 (FAP 773) over OTTER CREEK
3.0 MI E 7 MI CURVE, Cumberland, Illinois
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: IL 121 (FAP 773)
The IL 121 (FAP 773) bridge in Cumberland, Illinois carries IL 121 (FAP 773) over OTTER CREEK. It was built in 1933, making it 93 years old today. It was last reconstructed in 1971, extending its service life. The structure is built primarily of concrete and spans 2 sections, stretching 7.6 meters (25 feet) end to end. Daily traffic averages 1,600 vehicles, placing it in the moderately-trafficked tier of Illinois bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show culvert at 4/9. 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 89.1 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How IL 121 (FAP 773) 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 How the historical reference is calculated.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
- 1933
- Last Reconstructed
- 1971
- Material
- Concrete
- Number of Spans
- 2
- Structure Length
- 7.6 m (25 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 1,600 vehicles/day
- Structure Number
- 018200400000000
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
IL 121 (FAP 773) 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 IL 121 (FAP 773) against other structures in Cumberland 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 IL 121 (FAP 773)?
IL 121 (FAP 773) in Cumberland, Illinois on the FHWA's 0–9 scale.
How often is IL 121 (FAP 773) inspected?
IL 121 (FAP 773)'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 1,600 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. IL 121 (FAP 773) 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 IL 121 (FAP 773)?
IL 121 (FAP 773) has an NBI inventory load rating of 89.1 metric tons.
Who is responsible for maintaining IL 121 (FAP 773)?
IL 121 (FAP 773) is owned and maintained by State Highway Agency.
How old is IL 121 (FAP 773) and does age affect safety?
IL 121 (FAP 773) was built in 1933, making it 93 years old and last reconstructed in 1971.
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.