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Marine Hwy Route over Ketchikan Berth I

Ketchikan Gateway Borough, Alaska · rated Fair in the 2025 National Bridge Inventory

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

Marine Hwy Route over Ketchikan Berth I in Ketchikan Gateway Borough, Alaska, 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 1988, making it 37 years old at the 2025 inventory.
It carries about 164 vehicles a day (traffic count year 2018).
Its listed owner is the state highway agency.
It is one of 45 of the 107 inventoried bridges in Ketchikan Gateway Borough rated fair (42.1%); 12 (11.2%) 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

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

Bridge	Built	Vehicles/day	Condition
South Tongass Hwy over Tongass Avenue Viaduct	1956	14,564	Fair
South Tongass Hwy over Water St Viaduct	1955	14,046	Poor
South Tongass Hwy over Hoadley Creek	1957	11,900	Poor
North Tongass Hwy over Carlanna Creek	1973	9,210	Fair
South Tongass Hwy over Front Street Viaduct	1969	8,330	Fair
South Tongass Hwy over Ketchikan Creek	1944	6,850	Fair