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S.H. 74 EB over I-35 Under

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

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

S.H. 74 EB over I-35 Under in McClain County, Oklahoma, 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 1968 and reconstructed in 2017, making it 57 years old at the 2025 inventory.
It carries about 5,540 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 132 of the 242 inventoried bridges in McClain County rated fair (54.5%); 11 (4.5%) 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	Continuous steel stringer or multi-beam girder
Length	about 229 ft
Location	Jct I-35 & SH 74
NBI structure number	173370000000000
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 S. Canadian River	2000	45,900	Fair
I-35 over Creek	1959	45,100	Fair
I-35 over Creek	1959	36,300	Fair
I-35 over Creek	1959	36,300	Fair
I-35 NB over S.H. 74 SB Ramp Under	1967	35,900	Fair
I-35 over Creek	1959	35,100	Good