US Bridges

Interstate 79 over Mar. Co. 29/1

Fair

Marion County, West Virginia · 1.28 MI South US Rt 250 · Structure no. 00000000025A131

Built
1967
58 years old
Condition
Fair
inspected November 2024
Type
Culvert
Concrete
Length
20 ft
1 main span
Daily traffic
49,500
2019 count
Owner
State
State Highway Agency

About this bridge

Interstate 79 over Mar. Co. 29/1 is a concrete culvert carrying Interstate 79 over Mar. Co. 29/1 in Marion County, West Virginia. It was built in 1967, so it is 58 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 49,500 vehicles a day, roughly 14% of them trucks, projected to reach 67,320 by 2041. The structure is 20 ft (6.2 m) long. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesInterstate 79
CrossesMar. Co. 29/1
Location1.28 MI South US Rt 250
RouteInterstate 7900
CountyMarion County
StateWest Virginia
Coordinates39.41794, -80.19896
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
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98 US tons
Inventory rating88 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length20 ft (6.2 m)
Longest span20 ft (6.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic49,500 (2019)
Projected traffic67,320 by 2041
Trucks14%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.8 mi (11 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.7 million (2023 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Interstate 79 over Mar. Co. 29/1 built?

It was built in 1967, making it 58 years old in 2025.

What condition is Interstate 79 over Mar. Co. 29/1 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 November 2024.

How much traffic does Interstate 79 over Mar. Co. 29/1 carry?

About 49,500 vehicles per day (2019 count), of which roughly 14% are trucks.

How long is Interstate 79 over Mar. Co. 29/1?

The structure is 20 ft (6.2 m) long with a longest span of 20 ft (6.2 m).

Who owns Interstate 79 over Mar. Co. 29/1?

It is owned by the State Highway Agency.