US Bridges

I-79 Nbl over Big Sandy Ck. & CR 29

Fair

Roane County, West Virginia · 3.94 Mile North of CR 29 · Structure no. 00000000044A126

Built
1972
53 years old
Condition
Fair
inspected June 2024
Type
Girder and Floorbeam System
Steel Continuous
Length
377 ft
1 main span
Daily traffic
3,500
2022 count
Owner
State
State Highway Agency

About this bridge

I-79 Nbl over Big Sandy Ck. & CR 29 is a steel continuous girder and floorbeam system carrying I-79 Nbl over Big Sandy Ck. & CR 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 3,500 vehicles a day, roughly 16% of them trucks, projected to reach 5,005 by 2042. The structure is 377 ft (114.8 m) long and 45 ft wide.

CarriesI-79 Nbl
CrossesBig Sandy Ck. & CR 29
Location3.94 Mile North of CR 29
RouteInterstate 79
Coordinates38.58284, -81.20433
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46 US tons
Inventory rating27 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20 + Mod
Structure length377 ft (114.8 m)
Longest span130 ft (39.6 m)
Deck width45 ft (13.7 m)
Roadway width41 ft (12.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,500 (2022)
Projected traffic5,005 by 2042
Trucks16%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
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 million
NavigationNo navigation control on waterway

Frequently asked questions

When was I-79 Nbl over Big Sandy Ck. & CR 29 built?

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

What condition is I-79 Nbl over Big Sandy Ck. & 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 June 2024.

How much traffic does I-79 Nbl over Big Sandy Ck. & CR 29 carry?

About 3,500 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is I-79 Nbl over Big Sandy Ck. & CR 29?

The structure is 377 ft (114.8 m) long with a longest span of 130 ft (39.6 m) and a deck 45 ft wide.

Who owns I-79 Nbl over Big Sandy Ck. & CR 29?

It is owned by the State Highway Agency.