US Bridges

I-77 Nbl over CR 21/31

Good

Wood County, West Virginia · 1.32 MI S of CR 21 · Structure no. 00000000054A113

Built
1968
57 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
160 ft
1 main span
Daily traffic
4,550
2022 count
Owner
State
State Highway Agency

About this bridge

I-77 Nbl over CR 21/31 is a steel continuous stringer/multi-beam or girder carrying I-77 Nbl over CR 21/31 in Wood County, West Virginia. It was built in 1968, so it is 57 years old, older than the West Virginia average of 44.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,550 vehicles a day, roughly 19% of them trucks, projected to reach 6,507 by 2042. The structure is 160 ft (48.8 m) long and 41 ft wide.

Location

Open in Google Maps
CarriesI-77 Nbl
CrossesCR 21/31
Location1.32 MI S of CR 21
RouteInterstate 77
CountyWood County
StateWest Virginia
Coordinates39.06453, -81.57178
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83 US tons
Inventory rating48.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20 + Mod
Structure length160 ft (48.8 m)
Longest span62 ft (18.8 m)
Deck width41 ft (12.6 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,550 (2022)
Projected traffic6,507 by 2042
Trucks19%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.3 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-77 Nbl over CR 21/31 built?

It was built in 1968, making it 57 years old in 2025.

What condition is I-77 Nbl over CR 21/31 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.

How much traffic does I-77 Nbl over CR 21/31 carry?

About 4,550 vehicles per day (2022 count), of which roughly 19% are trucks.

How long is I-77 Nbl over CR 21/31?

The structure is 160 ft (48.8 m) long with a longest span of 62 ft (18.8 m) and a deck 41 ft wide.

Who owns I-77 Nbl over CR 21/31?

It is owned by the State Highway Agency.