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N3550 over Gray Horse Creek

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

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

N3550 over Gray Horse Creek in Osage 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 1989, making it 36 years old at the 2025 inventory.
It carries about 258 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 167 of the 368 inventoried bridges in Osage County rated fair (45.4%); 66 (17.9%) 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 tee beam
Length	about 136 ft
Location	6 Mi. SE of Fairfax
NBI structure number	223480000000000
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
N3934 (tisdale Ex) over Creek	1987	12,200	Fair
Tisdale Pkwy/ S-bd over Apache St. Under	2001	12,000	Fair
Tisdale Pkwy. N-bd over Apache St. Under	2001	12,000	Fair
Gilcrease Expwy over Creek	2009	10,300	Good
Gilcrease Expwy over Creek	2009	10,300	Good
U.S. 60 over Ark River & Co Rd Under	1989	6,800	Fair