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Chiniak Highway over West Fork Twin Creek

Kodiak Island Borough, Alaska · rated Good in the 2025 National Bridge Inventory

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

Chiniak Highway over West Fork Twin Creek in Kodiak Island Borough, Alaska, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the culvert, rated 8 (very good condition) on the 0-9 scale.
It was built in 1975, making it 50 years old at the 2025 inventory.
It carries about 166 vehicles a day (traffic count year 2018).
Its listed owner is the state highway agency.
It is one of 8 of the 25 inventoried bridges in Kodiak Island Borough rated good (32.0%); 3 (12.0%) 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	8	Very good condition

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

Bridge	Built	Vehicles/day	Condition
Rezanof Drive over Buskin River No 5	1995	5,150	Good
Rezanof Drive over Sargent Creek	1980	2,790	Poor
Near Island Road over Kodiak Harbor Channel	1986	1,970	Good
Rezanof Drive over Russian River	1980	1,770	Poor
Chiniak Highway over American River	1974	600	Fair
Chiniak Highway over Salt Creek	1974	600	Poor