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State Route 51 over American River

Sacramento County, California · rated Fair in the 2025 National Bridge Inventory

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

State Route 51 over American River in Sacramento County, California, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
It was built in 1954 and reconstructed in 1966, making it 71 years old at the 2025 inventory.
It carries about 160,000 vehicles a day (traffic count year 2010).
Its listed owner is the state highway agency.
It is one of 329 of the 737 inventoried bridges in Sacramento County rated fair (44.6%); 16 (2.2%) 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


Structure	Steel stringer or multi-beam girder
Length	about 1,889 ft
Location	03-sac-051-2.61-sac
NBI structure number	24 0003
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
U.S. Highway 50 over 39TH Street	1971	231,000	Good
U.S. Highway 50 over 65TH Street	1971	231,000	Good
Interstate 80 over Winters Street	1970	200,000	Good
State Route 99 over 21ST Ave	1959	193,000	Good
State Route 99 over 2ND Ave	1959	193,000	Good
State Route 99 over Broadway	1961	193,000	Good