Thoroughfare Road over Trib of Lake Manassas
Prince William County, Virginia · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Thoroughfare Road over Trib of Lake Manassas in Prince William County, Virginia, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 8 (very good condition) on the 0-9 scale.
- It was built in 2021, making it 4 years old at the 2025 inventory.
- It carries about 152 vehicles a day (traffic count year 2016).
- Its listed owner is the state highway agency.
- It is one of 165 of the 308 inventoried bridges in Prince William County rated good (53.6%); 4 (1.3%) 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 July 2024, on a 24-month routine inspection cycle.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (38.79811, -77.65498)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 8 | 8 | Very good condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 27 ft |
| Location | 00.43fr15 00.18to Sugar |
| NBI structure number | 000000000031618 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | July 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Virginia department of transportation.
Busiest bridges in Prince William County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-66 & Rte. 705 over Trib. of Youngs Branch | 2006 | 119,023 | Fair |
| I-66 over Trib. of Youngs Branch | 2006 | 119,023 | Good |
| I-95 NB over Occoquan River | 1992 | 92,824 | Fair |
| Interstate 95_NBL over Occoquan ROAD_RTE.906 | 1962 | 88,978 | Fair |
| S.b.l. 95 & Hov over Occoquan Road-route 906 | 1962 | 81,223 | Fair |
| I-66 Ebl over Bull Run | 1961 | 80,899 | Fair |
All bridges nearby: Prince William County, VA bridge conditions · every bridge in Prince William County · Virginia bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.