US 36, SR 3 & 229
Carrying US 36, SR 3 & 229 over KOKOSING RIVER OVERFLOW
410' E OF JCT SR 229, Knox, Ohio
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: US 36, SR 3 & 229
The US 36, SR 3 & 229 bridge in Knox, Ohio carries US 36, SR 3 & 229 over KOKOSING RIVER OVERFLOW. It was built in 1961, making it 65 years old today. It was last reconstructed in 1996, extending its service life. The structure is built primarily of concrete continuous and spans 4 sections, stretching 40.8 meters (134 feet) end to end. Daily traffic averages 11,530 vehicles, placing it in the heavily-trafficked tier of Ohio bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 8/9, superstructure at 8/9, substructure at 6/9. The weakest component sits in fair condition. None of this bridge's reported major components fall into the Poor condition range. Its NBI inventory load rating is 32.4 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How US 36, SR 3 & 229 compares
Live comparison across Ohio.
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 How the historical reference is calculated.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
- 1961
- Last Reconstructed
- 1996
- Material
- Concrete Continuous
- Number of Spans
- 4
- Structure Length
- 40.8 m (134 ft)
- Deck Width
- 15.9 m (52 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 11,530 vehicles/day
- Structure Number
- 4201507
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) is in good condition (8/9), showing no significant deterioration.
- • The superstructure (beams and supports above the deck) rates good at 8/9, with no significant deterioration on file.
- • At 6/9, the substructure (piers and abutments) shows fair condition, with minor wear flagged for upkeep.
How to read this record
This page shows what the last federal inspection recorded, not whether US 36, SR 3 & 229 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 US 36, SR 3 & 229 against other structures in Knox and across Ohio. Ohio 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 US 36, SR 3 & 229?
US 36, SR 3 & 229 in Knox, Ohio has a deck rating of 8/9, superstructure rating of 8/9, and substructure rating of 6/9 on the FHWA's 0–9 scale.
How often is US 36, SR 3 & 229 inspected?
US 36, SR 3 & 229'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 11,530 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. US 36, SR 3 & 229 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 US 36, SR 3 & 229?
US 36, SR 3 & 229 has an NBI inventory load rating of 32.4 metric tons.
Who is responsible for maintaining US 36, SR 3 & 229?
US 36, SR 3 & 229 is owned and maintained by State Highway Agency.
How old is US 36, SR 3 & 229 and does age affect safety?
US 36, SR 3 & 229 was built in 1961, making it 65 years old and last reconstructed in 1996.
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.