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Co. Rd. E0170 over I-35 Under

Kay County, Oklahoma · rated Fair in the 2025 National Bridge Inventory

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

Co. Rd. E0170 over I-35 Under in Kay County, Oklahoma, 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 1960, making it 65 years old at the 2025 inventory.
It carries about 50 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 268 of the 419 inventoried bridges in Kay County rated fair (64.0%); 22 (5.3%) 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

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

Bridge	Built	Vehicles/day	Condition
I-35 over Salt Fk Ark Rvr Oflow	1959	17,500	Good
I-35 over Salt Fk Ark Rvr Oflow	1962	17,500	Fair
I-35 over Salt Fk Ark Rvr Oflow	1962	17,500	Fair
I-35 over Creek	1959	15,700	Fair
I-35 over Creek	1960	15,500	Fair
I-35 over Dry Creek	1959	14,300	Fair