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N4020 over Cotton Creek

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

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

N4020 over Cotton Creek in Washington 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 2007, making it 18 years old at the 2025 inventory.
It carries about 100 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 110 of the 215 inventoried bridges in Washington County rated fair (51.2%); 24 (11.2%) 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 107 ft
Location	4E 2.8N of U.S. 75
NBI structure number	275520000000000
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
U.S. 75 over Turkey Creek	1950	22,600	Good
Fau 6110 (frank Ph over Caney River	1980	20,700	Fair
U.S. 60 over U.S. 75 Under	1971	18,800	Good
U.S. 60 over Caney River	1971	18,800	Fair
U.S. 75 over Rice Creek	1949	16,400	Fair
U.S. 75 over Coon Creek	1983	14,700	Fair