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Parks Highway over Iceworm Gulch

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

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

Parks Highway over Iceworm Gulch in Denali Borough, Alaska, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 1971, making it 54 years old at the 2025 inventory.
It carries about 2,670 vehicles a day (traffic count year 2020).
Its listed owner is the state highway agency.
It is one of 21 of the 27 inventoried bridges in Denali Borough rated fair (77.8%); 1 (3.7%) 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	Steel stringer or multi-beam girder
Length	about 81 ft
Location	Mile Point 204.4
NBI structure number	1146
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
Parks Highway over Kingfisher Creek	1971	2,670	Fair
Parks Highway over Hornet Creek	1971	2,670	Fair
Parks Highway over Nenana River Park Sta	1970	2,340	Fair
Parks Highway over Nenana River Park Bnd	1973	1,680	Fair
Parks Highway over Riley Creek	2015	1,680	Good
Parks Highway over Panguingue Creek	1965	1,640	Fair