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Fdr 524-01 over N. Yuba River

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

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

Fdr 524-01 over N. Yuba River in Sierra County, California, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1963, making it 62 years old at the 2025 inventory.
It carries about 50 vehicles a day.
It is one of 33 of the 66 inventoried bridges in Sierra County rated fair (50.0%); 4 (6.1%) 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


Structure	Continuous concrete girder and floorbeam
Length	about 150 ft
Location	S27 T20N R12E
NBI structure number	051753000001029
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 395 over Long Valley Rd	1976	4,600	Good
U.S. Highway 395 over Long Valley Rd	1976	2,300	Good
State Route 89 over Little Truckee River	1982	2,000	Fair
State Route 49 over Smithneck Creek	1965	1,900	Good
State Route 89 over Turner Canyon	1975	1,400	Good
State Route 49 over Downie River	1938	1,200	Good