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S.H. 66 over I-35 Under

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

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

S.H. 66 over I-35 Under in Oklahoma 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 1986, making it 39 years old at the 2025 inventory.
It carries about 19,200 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 696 of the 1,214 inventoried bridges in Oklahoma County rated fair (57.3%); 80 (6.6%) 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 202 ft
Location	3.2 Mi N of Turnpike
NBI structure number	213360000000000
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
I-44 over Creek	1973	140,700	Fair
I-44 EB over I-44 Ramp N-e Under	1975	140,700	Fair
I-35 over Creek	1959	136,800	Good
I-44 over Creek	1974	128,300	Good
I-44 WB over S.H. 152 Ramp Under	1974	128,300	Fair
I-44 WB over I-44 Ramp S-w Under	1975	125,600	Fair