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State Route 99 NB over State Route 32 WB

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

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

State Route 99 NB over State Route 32 WB in Butte County, California, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
It was built in 1965, making it 60 years old at the 2025 inventory.
It carries about 24,750 vehicles a day (traffic count year 2020).
Its listed owner is the state highway agency.
It is one of 138 of the 440 inventoried bridges in Butte County rated good (31.4%); 24 (5.5%) 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


Structure	Continuous concrete tee beam
Length	about 108 ft
Location	03-but-099-r32.44-chc
NBI structure number	12 0150R
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
Skyway over State Route 99	1965	37,400	Good
State Route 99 over Dry Channel	1953	32,600	Good
State Route 99 over Scrub Creek	1952	28,250	Good
State Route 99 over Nance Canyon	1952	28,250	Good
Cohasset Hwy over State Route 99	1966	27,008	Good
State Route 99 SB over Little Chico Creek	1965	24,750	Fair