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S.H. 74 over I-35 Under

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

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

S.H. 74 over I-35 Under in McClain County, Oklahoma, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 4 (poor condition) on the 0-9 scale.
It was built in 1959, making it 66 years old at the 2025 inventory.
It carries about 5,400 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 11 of the 242 inventoried bridges in McClain County rated poor (4.5%); 11 (4.5%) are rated poor.
A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.

Component ratings


Structure	Continuous steel stringer or multi-beam girder
Length	about 271 ft
Location	2.7 Mi S Clev. C/l
NBI structure number	144960000000000
Condition class	Poor

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