US Bridges

I-79 over CO 21/1

Fair

Lewis County, West Virginia · 2.03 MI S US 19 · Structure no. 00000000021A113

Built
1972
53 years old
Condition
Fair
inspected November 2023
Type
Culvert
Concrete
Length
31 ft
1 main span
Daily traffic
19,200
2018 count
Owner
State
State Highway Agency

About this bridge

I-79 over CO 21/1 is a concrete culvert carrying I-79 over CO 21/1 in Lewis 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 19,200 vehicles a day, roughly 23% of them trucks, projected to reach 27,456 by 2038. The structure is 31 ft (9.4 m) long. If it were closed, the detour would be 11.2 mi (18 km).

CarriesI-79
CrossesCO 21/1
Location2.03 MI S US 19
RouteInterstate 7900
Coordinates38.94518, -80.53828
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
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 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
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20 + Mod
Structure length31 ft (9.4 m)
Longest span29 ft (8.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,200 (2018)
Projected traffic27,456 by 2038
Trucks23%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed11.2 mi (18 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$300,000 (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-79 over CO 21/1 built?

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

What condition is I-79 over CO 21/1 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 2023.

How much traffic does I-79 over CO 21/1 carry?

About 19,200 vehicles per day (2018 count), of which roughly 23% are trucks.

How long is I-79 over CO 21/1?

The structure is 31 ft (9.4 m) long with a longest span of 29 ft (8.9 m).

Who owns I-79 over CO 21/1?

It is owned by the State Highway Agency.