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Mikkalo Lane over Hay Creek

Gilliam County, Oregon · rated Fair in the 2025 National Bridge Inventory

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

Mikkalo Lane over Hay Creek in Gilliam County, Oregon, 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 1964, making it 61 years old at the 2025 inventory.
It carries about 13 vehicles a day (traffic count year 2020).
Its listed owner is the county highway agency.
It is one of 19 of the 35 inventoried bridges in Gilliam County rated fair (54.3%); 0 (0.0%) 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	Continuous concrete tee beam
Length	about 81 ft
Location	7.3 Mi W of Hwy 19
NBI structure number	21C13 663 00500
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
I-84 (hwy 002) over Blalock Canyon Rd	1964	14,269	Fair
I-84 (hwy 002) over John Day River	1963	14,253	Fair
I-84 (hwy 002) over Arlington Viaduct	1964	14,069	Fair
I-84 (hwy 002) WB over Willow Creek West	1954	7,076	Fair
I-84 (hwy 002) EB over Willow Creek EB	1965	7,076	Fair
Or 19 (hwy 005) over China Creek	1964	1,331	Good