US Bridges

I-77 SB over CR 29

Fair

Kanawha County, West Virginia · 3.96 MI N of CR 27 · Structure no. 00000000020A446

Built
1971
54 years old, rebuilt 1999
Condition
Fair
inspected December 2022
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
168 ft
1 main span
Daily traffic
10,650
2020 count
Owner
State
State Highway Agency

About this bridge

I-77 SB over CR 29 is a steel continuous stringer/multi-beam or girder carrying I-77 SB over CR 29 in Kanawha County, West Virginia. It was built in 1971 and reconstructed in 1999, so it is 54 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 fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 10,650 vehicles a day, roughly 17% of them trucks, projected to reach 16,614 by 2040. The structure is 168 ft (51.3 m) long and 64 ft wide.

Location

Open in Google Maps
CarriesI-77 SB
CrossesCR 29
Location3.96 MI N of CR 27
RouteInterstate 7700
CountyKanawha County
StateWest Virginia
Coordinates38.46284, -81.64409
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating88 US tons
Inventory rating52 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20 + Mod
Structure length168 ft (51.3 m)
Longest span70 ft (21.3 m)
Deck width64 ft (19.4 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,650 (2020)
Projected traffic16,614 by 2040
Trucks17%
Lanes on structure3
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 proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$425,000 (2020 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-77 SB over CR 29 built?

It was built in 1971, making it 54 years old in 2025. It was reconstructed in 1999.

What condition is I-77 SB over CR 29 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in December 2022.

How much traffic does I-77 SB over CR 29 carry?

About 10,650 vehicles per day (2020 count), of which roughly 17% are trucks.

How long is I-77 SB over CR 29?

The structure is 168 ft (51.3 m) long with a longest span of 70 ft (21.3 m) and a deck 64 ft wide.

Who owns I-77 SB over CR 29?

It is owned by the State Highway Agency.