I-77 NB
Carrying I-77 NB over CR 21
0.99 MI N OF CR 28 SLS, Kanawha, West Virginia
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
I-77 NB in Kanawha, West Virginia sits above 30% of rated West Virginia bridges on inventory load rating (33 t), while its 1959 build year is earlier than 86% of Kanawha's recorded-year cohort (554 bridges).
I-77 NB in Kanawha, West Virginia is rated Poor in the FHWA's 2024 National Bridge Inventory. Built in 1959, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 4. The lowest applicable rating sets the federal condition category, so this Poor 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 WV:00000000020A232
INTERSTATE-ERA · STEEL · SINGLE-SPAN · DECK-LED · HEAVY-ADT · STANDARD-LOAD · CAT-POOR
- INTERSTATE-ERA 1950–1979
- STEEL Steel
- SINGLE-SPAN Single span
- DECK-LED Deck-led
- HEAVY-ADT Heavy ADT
- STANDARD-LOAD Standard load
- CAT-POOR Poor
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: I-77 NB
The I-77 NB bridge in Kanawha, West Virginia carries I-77 NB over CR 21. It was built in 1959, making it 67 years old today. It was last reconstructed in 1986, extending its service life. The structure is built primarily of steel continuous and spans 1 section, stretching 56.6 meters (186 feet) end to end. Daily traffic averages 12,821 vehicles, placing it in the heavily-trafficked tier of West Virginia bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 4/9, superstructure at 5/9, substructure at 6/9. The weakest component sits in poor condition. Because at least one major component scores 4 or lower, this bridge falls in FHWA's Poor condition category. That category is not a closure order.
How I-77 NB compares
Age against the county: built in 1959, earlier than 478 of Kanawha's 554 bridges with a recorded construction year (86%), against a county median build year of 1981. Age is not a defect on its own, but it is the population from which future Poor ratings are drawn.
Live comparison across West Virginia bridges with a recorded inventory load rating (7,347 of 7,348 rated).
I-77 NB vs every rated West Virginia bridge
Inventory load rating (metric tons), FHWA NBI, this state
33 Top 70% higher than 30% of 7,347 bridges
rated West 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.
Kanawha inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 554 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
- 1959
- Last Reconstructed
- 1986
- Material
- Steel Continuous
- Number of Spans
- 1
- Structure Length
- 56.6 m (186 ft)
- Deck Width
- 17.8 m (58 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 12,821 vehicles/day
- Structure Number
- 00000000020A232
Condition Analysis
- • The deck (driving surface) rates poor at 4/9, with advanced deterioration recorded on the latest inspection.
- • At 5/9, the superstructure (beams and supports above the deck) shows fair condition, with minor wear flagged for upkeep.
- • At 6/9, 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
I-77 NB 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 I-77 NB against other structures in Kanawha and across West Virginia. West 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 I-77 NB?
I-77 NB in Kanawha, West Virginia has a deck rating of 4/9, superstructure rating of 5/9, and substructure rating of 6/9 on the FHWA's 0–9 scale.
How often is I-77 NB inspected?
I-77 NB'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 12,821 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. I-77 NB 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 I-77 NB?
I-77 NB has an NBI inventory load rating of 32.7 metric tons.
Who is responsible for maintaining I-77 NB?
I-77 NB is owned and maintained by State Highway Agency.
How old is I-77 NB and does age affect safety?
I-77 NB was built in 1959, making it 67 years old and last reconstructed in 1986.
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.