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Mitkof Highway over Unnamed Creek Mp 25.4

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

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

Mitkof Highway over Unnamed Creek Mp 25.4 in Petersburg 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 2011, making it 14 years old at the 2025 inventory.
It carries about 100 vehicles a day (traffic count year 2020).
Its listed owner is the state highway agency.
It is one of 63 of the 137 inventoried bridges in Petersburg Borough rated good (46.0%); 11 (8.0%) 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
Nordic Drive over Hammer Slough	1974	4,210	Fair
Ifa Ferry Route over Petersburg S Mitkof Term	2006	2,659	Good
Irr:ptrsbg/kake Rd over Gunnuk Creek	1981	770	Fair
Mitkof Highway over Twin Creek	1996	760	Good
Irr:keku Rd (kake) over Sitkum Creek	2011	270	Fair
Birch Street over Birch Street Viaduct	1960	200	Fair