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Chester Ave SB over Kern River

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

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

Chester Ave SB over Kern River in Kern 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 6 (satisfactory condition) on the 0-9 scale.
It was built in 2007, making it 18 years old at the 2025 inventory.
It carries about 9,973 vehicles a day (traffic count year 2016).
Its listed owner is a city or municipal highway agency.
It is one of 299 of the 668 inventoried bridges in Kern County rated fair (44.8%); 37 (5.5%) 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 prestressed concrete multiple box beam
Length	about 445 ft
Location	0.3 Mi S Roberts Lane
NBI structure number	50C0331L
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
State Route 99 over Kern River	1961	140,000	Fair
State Route 99 over BNSF Ry & Amtrak	1961	132,000	Good
State Route 99 over California Avenue	1963	132,000	Good
State Route 99 over SR 178 (rosedale Hwy)	1963	132,000	Good
State Route 99 over Truxtun Ave	1963	132,000	Good
State Route 99 over Canal Lateral 29	1933	130,000	Good