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Dalton Highway over West Fork N Fk Chandalar

North Slope Borough, Alaska · rated Fair in the 2025 National Bridge Inventory

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

Dalton Highway over West Fork N Fk Chandalar in North Slope Borough, Alaska, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 1982, making it 43 years old at the 2025 inventory.
It carries about 110 vehicles a day (traffic count year 2020).
Its listed owner is the state highway agency.
It is one of 5 of the 16 inventoried bridges in North Slope Borough rated fair (31.2%); 1 (6.2%) 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	Timber stringer or multi-beam girder
Length	about 40 ft
Location	Mile Point 243.7
NBI structure number	1516
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
Dalton Highway over Atigun River No. 2	2000	130	Good
Dalton Highway over Atigun River No. 1	2000	130	Good
Dalton Highway over Trevor Creek	1982	130	Fair
Dalton Highway over Roche Moutonnee Creek	2017	130	Good
Dalton Highway over Holden Creek	2013	130	Good
Dalton Highway over Dan Creek	1982	130	Fair