OLD US 41
Carrying OLD US 41 over CSX RAILROAD
00.72 S CO-OP ROAD, Knox, Indiana
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: OLD US 41
The OLD US 41 bridge in Knox, Indiana carries OLD US 41 over CSX RAILROAD. It was built in 1945, making it 81 years old today. It was last reconstructed in 1985, extending its service life. The structure is built primarily of concrete and spans 1 section, stretching 16.2 meters (53 feet) end to end. Daily traffic averages 176 vehicles, placing it in the lower-traffic tier of Indiana bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show a deck rating of 4/9, superstructure at 3/9, substructure 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 8.2 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How OLD US 41 compares
Live comparison across Indiana.
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 How the historical reference is calculated.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
- 1945
- Last Reconstructed
- 1985
- Material
- Concrete
- Number of Spans
- 1
- Structure Length
- 16.2 m (53 ft)
- Deck Width
- 10.4 m (34 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 176 vehicles/day
- Structure Number
- 4200273
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • At 4/9, the deck (driving surface) is in poor shape, with advanced wear flagged for priority repair.
- • The superstructure (beams and supports above the deck) is in poor condition (3/9), showing advanced deterioration that may require priority repair.
- • At 4/9, the substructure (piers and abutments) is in poor shape, with advanced wear flagged for priority repair.
How to read this record
OLD US 41 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 OLD US 41 against other structures in Knox and across Indiana. Indiana 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 OLD US 41?
OLD US 41 in Knox, Indiana has a deck rating of 4/9, superstructure rating of 3/9, and substructure rating of 4/9 on the FHWA's 0–9 scale.
How often is OLD US 41 inspected?
OLD US 41'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 176 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. OLD US 41 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 OLD US 41?
OLD US 41 has an NBI inventory load rating of 8.2 metric tons.
Who is responsible for maintaining OLD US 41?
OLD US 41 is owned and maintained by County Highway Agency.
How old is OLD US 41 and does age affect safety?
OLD US 41 was built in 1945, making it 81 years old and last reconstructed in 1985.
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.