KY-550
Carrying KY-550 over Jones Fork
.15 MI S of JCT KY 1087, Knott, Kentucky
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: KY-550
The KY-550 bridge in Knott, Kentucky carries KY-550 over Jones Fork. It was built in 1932, making it 94 years old today. It was last reconstructed in 1953, extending its service life. The structure is built primarily of concrete and spans 2 sections, stretching 32.3 meters (106 feet) end to end. Daily traffic averages 961 vehicles, placing it in the lower-traffic tier of Kentucky bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 5/9, superstructure at 6/9, substructure at 6/9. The weakest component sits in fair condition. All reported major components score above the Poor range. Its NBI inventory load rating is 29.5 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How KY-550 compares
Live comparison across Kentucky.
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 How the historical reference is calculated.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
- 1932
- Last Reconstructed
- 1953
- Material
- Concrete
- Number of Spans
- 2
- Structure Length
- 32.3 m (106 ft)
- Deck Width
- 6.2 m (20 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 961 vehicles/day
- Structure Number
- 060B00009N
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • At 5/9, the deck (driving surface) shows fair condition, with minor wear flagged for upkeep.
- • The superstructure (beams and supports above the deck) rates fair at 6/9, minor deterioration that routine maintenance should address.
- • The substructure (piers and abutments) is in fair condition (6/9), with minor deterioration that may require routine maintenance.
How to read this record
This page shows what the last federal inspection recorded, not whether KY-550 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 KY-550 against other structures in Knott and across Kentucky. Kentucky 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 KY-550?
KY-550 in Knott, Kentucky has a deck rating of 5/9, superstructure rating of 6/9, and substructure rating of 6/9 on the FHWA's 0–9 scale.
How often is KY-550 inspected?
KY-550'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 961 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. KY-550 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 KY-550?
KY-550 has an NBI inventory load rating of 29.5 metric tons.
Who is responsible for maintaining KY-550?
KY-550 is owned and maintained by State Highway Agency.
How old is KY-550 and does age affect safety?
KY-550 was built in 1932, making it 94 years old and last reconstructed in 1953.
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.