FAU 5643 LF LN
Carrying FAU 5643 LF LN over CSX RAILROAD
FRONTAGE-RD-W OF I75, Knox, Tennessee
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: FAU 5643 LF LN
The FAU 5643 LF LN bridge in Knox, Tennessee carries FAU 5643 LF LN over CSX RAILROAD. It was built in 1981, making it 45 years old today. The structure is built primarily of prestressed concrete continuous and spans 3 sections, stretching 51.9 meters (170 feet) end to end. Daily traffic averages 22,146 vehicles, placing it in the heavily-trafficked tier of Tennessee bridges. It is owned and maintained by City/Municipal Highway Agency.
The latest FHWA inspection records show a deck rating of 7/9, superstructure at 7/9, substructure at 7/9. The weakest component sits in good condition. No reported major component scores in the Poor range under the current federal condition thresholds. Its NBI inventory load rating is 27.9 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How FAU 5643 LF LN compares
Live comparison across Tennessee.
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 How the historical reference is calculated.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
- 1981
- Material
- Prestressed Concrete Continuous
- Number of Spans
- 3
- Structure Length
- 51.9 m (170 ft)
- Deck Width
- 13.4 m (44 ft)
- Owner
- City/Municipal Highway Agency
- Avg Daily Traffic
- 22,146 vehicles/day
- Structure Number
- 470E9900004
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) rates good at 7/9, with no significant deterioration on file.
- • The superstructure (beams and supports above the deck) is in good condition (7/9), showing no significant deterioration.
- • The substructure (piers and abutments) is in good condition (7/9), showing no significant deterioration.
How to read this record
This page shows what the last federal inspection recorded, not whether FAU 5643 LF LN 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 FAU 5643 LF LN against other structures in Knox and across Tennessee. Tennessee 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 FAU 5643 LF LN?
FAU 5643 LF LN in Knox, Tennessee has a deck rating of 7/9, superstructure rating of 7/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is FAU 5643 LF LN inspected?
FAU 5643 LF LN'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 22,146 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. FAU 5643 LF LN is currently shown as Good condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for FAU 5643 LF LN?
FAU 5643 LF LN has an NBI inventory load rating of 27.9 metric tons.
Who is responsible for maintaining FAU 5643 LF LN?
FAU 5643 LF LN is owned and maintained by City/Municipal Highway Agency.
How old is FAU 5643 LF LN and does age affect safety?
FAU 5643 LF LN was built in 1981, making it 45 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.