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Irr Bia Rte 25 over S. Fork Seekseekwa Creek

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

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

Irr Bia Rte 25 over S. Fork Seekseekwa Creek in Jefferson County, Oregon, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1973, making it 52 years old at the 2025 inventory.
It carries about 20 vehicles a day (traffic count year 2023).
It is one of 36 of the 80 inventoried bridges in Jefferson County rated fair (45.0%); 7 (8.8%) 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

Component	Rating (2025)	FHWA scale meaning
Culvert	6	Satisfactory condition

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

Bridge	Built	Vehicles/day	Condition
US 97 (hwy 004) over Crooked R Canyon High Br	2000	17,957	Good
US 97 (hwy 004) over Ochoco Main Canal N Unit	2005	13,479	Good
US 97 (hwy 004) over Ochoco Main Canal N Unit	2005	12,575	Good
US 97 (hwy 004)NB over Willow Creek	2006	11,568	Good
US 26 (Hwy 053) over BNSF	2005	11,556	Good
US 97 (hwy 004)SB over Willow Creek	1966	10,393	Fair