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Trinity Dam Blvd over Trinity River

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

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

Trinity Dam Blvd over Trinity River in Trinity 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 1963, making it 62 years old at the 2025 inventory.
It carries about 450 vehicles a day (traffic count year 2000).
Its listed owner is the county highway agency.
It is one of 75 of the 194 inventoried bridges in Trinity County rated fair (38.7%); 7 (3.6%) 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 steel stringer or multi-beam girder
Length	about 299 ft
Location	.2 Mi S/o Rush Creek Rd
NBI structure number	05C0170
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 299 over East Weaver Creek	1962	7,125	Fair
State Route 299 over Weaver Creek	1953	5,375	Fair
State Route 299 over Little Browns Creek	1999	5,375	Good
State Route 299 over Trinity River	1980	4,450	Fair
State Route 299 over Indian Creek	1974	4,050	Fair
State Route 299 over Gray Creek	1966	3,800	Fair