US Bridges

I-79 Sbl over CO 29

Fair

Roane County, West Virginia · 8.54 MI South of Wv 36 · Structure no. 00000000044A134

Built
1972
53 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
147 ft
1 main span
Daily traffic
5,800
2019 count
Owner
State
State Highway Agency

About this bridge

I-79 Sbl over CO 29 is a steel continuous stringer/multi-beam or girder carrying I-79 Sbl over CO 29 in Roane County, West Virginia. It was built in 1972, so it is 53 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 5,800 vehicles a day, roughly 16% of them trucks, projected to reach 8,294 by 2039. The structure is 147 ft (44.7 m) long and 45 ft wide.

Location

Open in Google Maps
CarriesI-79 Sbl
CrossesCO 29
Location8.54 MI South of Wv 36
RouteInterstate 79
CountyRoane County
StateWest Virginia
Coordinates38.57022, -81.2699
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 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 geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74 US tons
Inventory rating44 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20 + Mod
Structure length147 ft (44.7 m)
Longest span63 ft (19.2 m)
Deck width45 ft (13.6 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,800 (2019)
Projected traffic8,294 by 2039
Trucks16%
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$1.5 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-79 Sbl over CO 29 built?

It was built in 1972, making it 53 years old in 2025.

What condition is I-79 Sbl over CO 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 March 2023.

How much traffic does I-79 Sbl over CO 29 carry?

About 5,800 vehicles per day (2019 count), of which roughly 16% are trucks.

How long is I-79 Sbl over CO 29?

The structure is 147 ft (44.7 m) long with a longest span of 63 ft (19.2 m) and a deck 45 ft wide.

Who owns I-79 Sbl over CO 29?

It is owned by the State Highway Agency.