Interstate 79 over Monongahela River
Monongalia County, West Virginia · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Interstate 79 over Monongahela River in Monongalia County, West Virginia, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1971, making it 54 years old at the 2025 inventory.
- It carries about 38,200 vehicles a day (traffic count year 2020).
- Its listed owner is the state highway agency.
- It is one of 89 of the 203 inventoried bridges in Monongalia County rated fair (43.8%); 39 (19.2%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated September 2022, on a 24-month routine inspection cycle.
- It has fracture-critical members (NBI item 92A): steel tension members without a redundant load path, which get their own scheduled inspections.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (39.58821, -79.97925)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous steel deck truss |
| Length | about 1,549 ft |
| Location | 0.55 Mile North of I-68 |
| NBI structure number | 00000000031A170 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | September 2022 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
| Fracture critical (item 92A) | Yes |
Source: FHWA National Bridge Inventory, 2025 data as reported by the West Virginia department of transportation.
Busiest bridges in Monongalia County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Interstate 79 over Monongalia Co 45/9 | 1969 | 47,600 | Good |
| Interstate 68 over Booths Creek | 1970 | 39,800 | Good |
| I-79 & Mon Co 46/3 over Mine Track Bed | 1969 | 36,000 | Good |
| Interstate 68 over Cobun Creek | 1971 | 33,800 | Fair |
| Interstate 79 over Mon. Co. Rt. 73 | 1970 | 32,800 | Fair |
| Interstate 79 over Mgl. CO 87(Halleck Road) | 2022 | 32,700 | Good |
All bridges nearby: Monongalia County, WV bridge conditions · every bridge in Monongalia County · West Virginia bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.