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State Route 299 over Bieber Creek

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

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

State Route 299 over Bieber Creek in Lassen 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 1928 and reconstructed in 1979, making it 97 years old at the 2025 inventory.
It carries about 1,050 vehicles a day (traffic count year 2009).
Its listed owner is the state highway agency.
It is one of 28 of the 108 inventoried bridges in Lassen County rated good (25.9%); 8 (7.4%) 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 25 ft
Location	02-las-299-19.83
NBI structure number	07 0050
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 36 over Susan River	1964	15,300	Fair
State Route 36 over Jensen Slough	1964	15,300	Good
State Route 36 over Gold Run Creek	1964	10,300	Good
U.S. Highway 395 over Long Valley Creek	1956	5,500	Fair
U.S. Highway 395 over UP RR & BNSF Ry	1969	5,500	Fair
U.S. Highway 395 over Long Valley Creek Ovfl	1969	5,500	Fair