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15/29 Bypass NBL over Mountain Run

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

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

15/29 Bypass NBL over Mountain Run in Culpeper 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 6 (satisfactory condition) on the 0-9 scale.
It was built in 1971, making it 54 years old at the 2025 inventory.
It carries about 14,060 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 69 of the 99 inventoried bridges in Culpeper County rated fair (69.7%); 5 (5.1%) 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	6	Satisfactory condition

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

Bridge	Built	Vehicles/day	Condition
James Madison Hwy. over Jonas Run	1975	45,369	Fair
James Madison Hwy over Branch Jonas Run	1975	45,369	Fair
Route 15/29 SBL over Rappahannock River	1975	22,684	Fair
Route 15/29 NBL over Rappahannock River	1975	22,684	Fair
Routes 15 & 29 Bus over Hidens Branch	1932	21,338	Good
Route 15/29 Bus. over Mountain_run	1932	16,128	Fair