US Bridges

Mon. Co. Rt. 45 over I-79 NB and SB

Fair

Monongalia County, West Virginia · 0.10 MI East CO Rt 45/15 · Structure no. 00000000031A114

Built
1971
54 years old
Condition
Fair
inspected April 2023
Type
Arch - Deck
Steel
Length
231 ft
1 main span
Daily traffic
3,800
2019 count
Owner
State
State Highway Agency

About this bridge

Mon. Co. Rt. 45 over I-79 NB and SB is a steel arch - deck carrying Mon. Co. Rt. 45 over I-79 NB and SB in Monongalia County, West Virginia. It was built in 1971, so it is 54 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 3,800 vehicles a day, roughly 6% of them trucks, projected to reach 5,890 by 2041. The structure is 231 ft (70.3 m) long and 47 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesMon. Co. Rt. 45
CrossesI-79 NB and SB
Location0.10 MI East CO Rt 45/15
RouteCounty Highway 4500
CountyMonongalia County
StateWest Virginia
Coordinates39.60483, -79.9929
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionApril 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 geometry6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating68 US tons
Inventory rating36 US tons

Structure

Structure typeArch - Deck
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20
Structure length231 ft (70.3 m)
Longest span160 ft (48.8 m)
Deck width47 ft (14.2 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,800 (2019)
Projected traffic5,890 by 2041
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$689,000 (2023 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mon. Co. Rt. 45 over I-79 NB and SB built?

It was built in 1971, making it 54 years old in 2025.

What condition is Mon. Co. Rt. 45 over I-79 NB and SB 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 April 2023.

How much traffic does Mon. Co. Rt. 45 over I-79 NB and SB carry?

About 3,800 vehicles per day (2019 count), of which roughly 6% are trucks.

How long is Mon. Co. Rt. 45 over I-79 NB and SB?

The structure is 231 ft (70.3 m) long with a longest span of 160 ft (48.8 m) and a deck 47 ft wide.

Who owns Mon. Co. Rt. 45 over I-79 NB and SB?

It is owned by the State Highway Agency.