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Road 99W over Truckee Creek

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

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

Road 99W over Truckee Creek in Tehama County, California, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 1917 and reconstructed in 1936, making it 108 years old at the 2025 inventory.
It carries about 2,000 vehicles a day (traffic count year 2006).
Its listed owner is the county highway agency.
It is one of 259 of the 447 inventoried bridges in Tehama County rated fair (57.9%); 21 (4.7%) 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 tee beam
Length	about 21 ft
Location	0.1 Mi North of Hamilton
NBI structure number	08C0112
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
Interstate 5 over Biggs Creek	1940	36,500	Good
Interstate 5 over Taylors Wash	1946	36,000	Fair
Interstate 5 over Thomes Creek	2011	29,500	Fair
Interstate 5 over Kopta Creek	1965	29,000	Fair
Interstate 5 over Las Flores Creek	1965	28,000	Good
Interstate 5 over Branch Coyote Creek	1965	28,000	Good