ROUTE 643
Carrying ROUTE 643 over MUD FORK
1.40 M TO 702& .55 FR 685, Tazewell, Virginia
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
ROUTE 643 in Tazewell, Virginia sits above 67% of rated Virginia bridges on inventory load rating (54 t), while its 1973 build year is earlier than 46% of Tazewell's recorded-year cohort (204 bridges).
ROUTE 643 in Tazewell, Virginia is rated Fair in the FHWA's 2024 National Bridge Inventory. Built in 1973, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 5. The lowest applicable rating sets the federal condition category, so this Fair result describes the weakest reported component rather than the structure as a whole. No NBI category is a closure decision or a live crossing-safety verdict.
NBI record plate
Structure VA:000000000018612
INTERSTATE-ERA · CONCRETE · SINGLE-SPAN · SUB-LED · LOCAL-ADT · HEAVY-LOAD · CAT-FAIR
- INTERSTATE-ERA 1950–1979
- CONCRETE Concrete
- SINGLE-SPAN Single span
- SUB-LED Substructure-led
- LOCAL-ADT Local ADT
- HEAVY-LOAD Heavy load
- CAT-FAIR Fair
Inspection-sheet codes from this record’s year, material family, spans, controlling component, ADT, inventory load, and NBI category, not a live closure verdict.
Bridge Snapshot: ROUTE 643
The ROUTE 643 bridge in Tazewell, Virginia carries ROUTE 643 over MUD FORK. It was built in 1973, making it 53 years old today. It was last reconstructed in 2008, extending its service life. The structure is built primarily of concrete and spans 1 section, stretching 7.6 meters (25 feet) end to end. Daily traffic averages 151 vehicles, placing it in the lower-traffic tier of Virginia bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 7/9, superstructure at 7/9, substructure at 5/9. The weakest component sits in fair condition. All reported major components score above the Poor range.
How ROUTE 643 compares
Age against the county: built in 1973, earlier than 93 of Tazewell's 204 bridges with a recorded construction year (46%), against a county median build year of 1969. This is one of the newer structures in its county.
Live comparison across Virginia bridges with a recorded inventory load rating (14,112 of 14,120 rated).
ROUTE 643 vs every rated Virginia bridge
Inventory load rating (metric tons), FHWA NBI, this state
54 Top 33% higher than 67% of 14,112 bridges
rated Virginia bridges, bucketed by value
Each bar is a band; taller bars hold more bridges. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source FHWA National Bridge Inventory · August 2026
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Reported 0–9 component ratings from the FHWA NBI. The highlighted component is the lowest reported input to this record’s current condition category; it is not a closure or live crossing-safety decision.
Tazewell inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 204 bridges in this county. Orthogonal to this structure's component profile above: a county catalog share, not a live crossing-safety verdict.
Structural Details
- Year Built
- 1973
- Last Reconstructed
- 2008
- Material
- Concrete
- Number of Spans
- 1
- Structure Length
- 7.6 m (25 ft)
- Deck Width
- 6.1 m (20 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 151 vehicles/day
- Structure Number
- 000000000018612
Condition Analysis
- • The deck (driving surface) is in good condition (7/9), showing no significant deterioration.
- • At 7/9, the superstructure (beams and supports above the deck) is in good shape and shows no significant wear.
- • At 5/9, the substructure (piers and abutments) shows fair condition, with minor wear flagged for upkeep.
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
This page shows what the last federal inspection recorded, not whether ROUTE 643 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 ROUTE 643 against other structures in Tazewell and across Virginia. Virginia 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 ROUTE 643?
ROUTE 643 in Tazewell, Virginia has a deck rating of 7/9, superstructure rating of 7/9, and substructure rating of 5/9 on the FHWA's 0–9 scale.
How often is ROUTE 643 inspected?
ROUTE 643'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 151 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. ROUTE 643 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 ROUTE 643?
ROUTE 643 has an NBI inventory load rating of 53.5 metric tons.
Who is responsible for maintaining ROUTE 643?
ROUTE 643 is owned and maintained by State Highway Agency.
How old is ROUTE 643 and does age affect safety?
ROUTE 643 was built in 1973, making it 53 years old and last reconstructed in 2008.
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.
Share this inspection record
Send this source-bounded record or download its data card. An NBI condition category is not a closure or live crossing-safety verdict.
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. Component ratings, ADT, and condition category on this page are copied from the NBI record for this structure; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2024 NBI release. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.