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N3126 over Cottonwood Creek

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

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

N3126 over Cottonwood Creek in Logan County, Oklahoma, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 1965, making it 60 years old at the 2025 inventory.
It carries about 100 vehicles a day (traffic count year 2022).
Its listed owner is a city or municipal highway agency.
It is one of 169 of the 280 inventoried bridges in Logan County rated fair (60.4%); 55 (19.6%) 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 tee beam
Length	about 168 ft
Location	Fifth St N of Oklahoma St
NBI structure number	165460000000000
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
I-35 over Creek	1959	33,500	Fair
I-35 over Bird Creek	1959	25,900	Fair
I-35 over Pin Creek	1959	18,300	Fair
I-35 NB over Creek	1959	17,200	Fair
I-35 S.B. over Creek	1959	17,150	Fair
SB I-35 over Triplett Rd. Under	1998	16,900	Fair