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Wine Country Ave over Napa Drain

Napa County, California · rated Good in the 2025 National Bridge Inventory

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

Wine Country Ave over Napa Drain in Napa County, California, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
It was built in 1960 and reconstructed in 2016, making it 65 years old at the 2025 inventory.
It carries about 3,853 vehicles a day (traffic count year 2011).
Its listed owner is a city or municipal highway agency.
It is one of 71 of the 160 inventoried bridges in Napa County rated good (44.4%); 8 (5.0%) are rated poor.
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.

Component ratings

Component	Rating (2025)	FHWA scale meaning
Culvert	7	Good condition


Structure	Continuous concrete culvert
Length	about 22 ft
Location	at Solano Ave
NBI structure number	21C0111
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
State Route 29 over State Route 221 (soscol)	2024	79,300	Good
State Route 29 over American Canyon Creek	1943	48,000	Fair
State Route 29 over Nvrr Napa River Stanly	1977	48,000	Poor
State Route 29 over Stanley Creek	1981	48,000	Fair
State Route 29 over Dry Creek	1970	43,000	Fair
St Rte 29 Byway E over Craig Creek	1958	43,000	Good