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No Data Entered over Perm

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

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

No Data Entered over Perm in Ketchikan Gateway Borough, Alaska, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 4 (poor condition) on the 0-9 scale.
It was built in 1997, making it 28 years old at the 2025 inventory.
It carries about 2 vehicles a day (traffic count year 2006).
It is one of 12 of the 107 inventoried bridges in Ketchikan Gateway Borough rated poor (11.2%); 12 (11.2%) are rated poor.
A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.

Component ratings


Structure	Steel stringer or multi-beam girder
Length	about 89 ft
Location	Upper Carroll
NBI structure number	100520000001137
Condition class	Poor

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