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Irr:airport Beach over South Channel Unalaska

Aleutians West Census Area, Alaska · rated Good in the 2025 National Bridge Inventory

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

Irr:airport Beach over South Channel Unalaska in Aleutians West Census Area, Alaska, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
It was built in 2008, making it 17 years old at the 2025 inventory.
It carries about 3,450 vehicles a day (traffic count year 2020).
Its listed owner is the state highway agency.
It is one of 6 of the 8 inventoried bridges in Aleutians West Census Area rated good (75.0%); 0 (0.0%) 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


Structure	Prestressed concrete tee beam
Length	about 700 ft
Location	Mile Point 0.7
NBI structure number	1386
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
IRR:5TH Street over Iliuliuk River	1983	2,750	Fair
Irr:steward Road over Unalaska Creek	2006	2,333	Good
Captains Bay Road over Pyramid Creek	2001	976	Fair
Irr:summer Bay Rd over Summer Bay Creek	2014	400	Good
Irr:kelty Field Rd over Kelty Field	1999	30	Good
Irr:dock Street over Atka Dock Creek	1997	20	Good