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I-84 (hwy 002) over Blalock Canyon Rd

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

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

I-84 (hwy 002) over Blalock Canyon Rd 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 6 (satisfactory condition) on the 0-9 scale.
It was built in 1964, making it 61 years old at the 2025 inventory.
It carries about 14,269 vehicles a day (traffic count year 2022).
Its listed owner is the state 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	Prestressed concrete stringer or multi-beam girder
Length	about 157 ft
Location	149 Mi E Sherman Gill Cln
NBI structure number	08945 002 12943
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 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
Or 19 (hwy 005) over China Creek	1995	991	Good