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S.H. 51 over Creek

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

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

S.H. 51 over 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 culvert, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1952, making it 73 years old at the 2025 inventory.
It carries about 1,500 vehicles a day (traffic count year 2022).
Its listed owner is the state 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.
Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
It was rated good in the 2024 inventory and is now fair (culvert 7 to 6).
Its most recent inspection on record is dated September 2024, on a 24-month routine inspection cycle.
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

Component	Rating (2024)	Rating (2025)	FHWA scale meaning
Culvert	7	6	Satisfactory condition


Structure	Concrete culvert
Length	about 20 ft
Location	2.2 E Kingfisher C/l
NBI structure number	126870000000000
Condition class	Fair
Traffic status (item 41)	Open, no restriction
Last inspection (item 90)	September 2024
Inspection interval (item 91)	24 months
Scour (item 113)	8: foundations stable, scour above the top of the footing

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