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Amherst Drive over Flat Branch

Prince William County, Virginia · rated Fair in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

Amherst Drive over Flat Branch in Prince William County, Virginia, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the culvert, rated 5 (fair condition) on the 0-9 scale.
It was built in 1962, making it 63 years old at the 2025 inventory.
It carries about 8,544 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 139 of the 308 inventoried bridges in Prince William County rated fair (45.1%); 4 (1.3%) are rated poor.
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.

Component ratings

Component	Rating (2025)	FHWA scale meaning
Culvert	5	Fair condition

Source: FHWA National Bridge Inventory, 2025 data as reported by the Virginia department of transportation.

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