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Irr:keku Rd (kake) over Slo Duc Creek

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

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

Irr:keku Rd (kake) over Slo Duc Creek in Petersburg Borough, Alaska, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 2008, making it 17 years old at the 2025 inventory.
It carries about 40 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 fair (46.0%); 11 (8.0%) 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


Structure	Prestressed concrete tee beam
Length	about 83 ft
Location	Mile Point 6.7
NBI structure number	1468
Condition class	Fair

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