US Bridges

I-77 NB & SB over Garrison Avenue

Fair

Kanawha County, West Virginia · 0.32 MI N of I-64 · Structure no. 00000000020A434

Built
1974
51 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
190 ft
1 main span
Daily traffic
100,300
2022 count
Owner
State
State Highway Agency

About this bridge

I-77 NB & SB over Garrison Avenue is a steel continuous stringer/multi-beam or girder carrying I-77 NB & SB over Garrison Avenue in Kanawha County, West Virginia. It was built in 1974, so it is 51 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 100,300 vehicles a day, roughly 17% of them trucks, projected to reach 156,468 by 2042. The structure is 190 ft (57.8 m) long and 150 ft wide.

Location

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CarriesI-77 NB & SB
CrossesGarrison Avenue
Location0.32 MI N of I-64
RouteInterstate 77
CountyKanawha County
StateWest Virginia
Coordinates38.36235, -81.62353
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.9 US tons
Inventory rating46 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20 + Mod
Structure length190 ft (57.8 m)
Longest span74 ft (22.6 m)
Deck width150 ft (45.7 m)
Roadway width147 ft (44.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100,300 (2022)
Projected traffic156,468 by 2042
Trucks17%
Lanes on structure8
Traffic directionTwo-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$100,000 (2019 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-77 NB & SB over Garrison Avenue built?

It was built in 1974, making it 51 years old in 2025.

What condition is I-77 NB & SB over Garrison Avenue 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 September 2023.

How much traffic does I-77 NB & SB over Garrison Avenue carry?

About 100,300 vehicles per day (2022 count), of which roughly 17% are trucks.

How long is I-77 NB & SB over Garrison Avenue?

The structure is 190 ft (57.8 m) long with a longest span of 74 ft (22.6 m) and a deck 150 ft wide.

Who owns I-77 NB & SB over Garrison Avenue?

It is owned by the State Highway Agency.