US Bridges

I-77 NB over Piedmont RD & Smith ST

Fair

Kanawha County, West Virginia · 1.16 MI N of Wv 114 · Structure no. 00000000020A409

Built
1975
50 years old
Condition
Fair
inspected December 2023
Type
Box Beam or Girders - Multiple
Steel Continuous
Length
1,427 ft
1 main span
Daily traffic
40,862
2014 count
Owner
State
State Highway Agency

About this bridge

I-77 NB over Piedmont RD & Smith ST is a steel continuous box beam or girders - multiple carrying I-77 NB over Piedmont RD & Smith ST in Kanawha County, West Virginia. It was built in 1975, so it is 50 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 5 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 40,862 vehicles a day, roughly 17% of them trucks, projected to reach 71,508 by 2038. The structure is 1,427 ft (435 m) long and 56 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesI-77 NB
CrossesPiedmont RD & Smith ST
Location1.16 MI N of Wv 114
RouteInterstate 77
CountyKanawha County
StateWest Virginia
Coordinates38.35345, -81.6285
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating31 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans1 (+14 approach)
Design loadHS 20 + Mod
Structure length1,427 ft (435 m)
Longest span136 ft (41.5 m)
Deck width56 ft (17.1 m)
Roadway width52 ft (16 m)
Vertical clearance over deck18 ft (5.4 m)

Traffic and service

Average daily traffic40,862 (2014)
Projected traffic71,508 by 2038
Trucks17%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed6.2 mi (10 km)
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-77 NB over Piedmont RD & Smith ST built?

It was built in 1975, making it 50 years old in 2025.

What condition is I-77 NB over Piedmont RD & Smith ST 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 2023.

How much traffic does I-77 NB over Piedmont RD & Smith ST carry?

About 40,862 vehicles per day (2014 count), of which roughly 17% are trucks.

How long is I-77 NB over Piedmont RD & Smith ST?

The structure is 1,427 ft (435 m) long with a longest span of 136 ft (41.5 m) and a deck 56 ft wide.

Who owns I-77 NB over Piedmont RD & Smith ST?

It is owned by the State Highway Agency.