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Mitkof Highway over Ohmer Creek

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 Ohmer Creek 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 deck, rated 8 (very good condition) on the 0-9 scale.
It was built in 2007, making it 18 years old at the 2025 inventory.
It carries about 80 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


Structure	Prestressed concrete tee beam
Length	about 115 ft
Location	Mile Point 20.2
NBI structure number	0388
Condition class	Good

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