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U.S. 56 over Beaver River

Cimarron County, Oklahoma · rated Good in the 2025 National Bridge Inventory

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

U.S. 56 over Beaver River in Cimarron County, Oklahoma, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
It was built in 2017, making it 8 years old at the 2025 inventory.
It carries about 550 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 48 of the 90 inventoried bridges in Cimarron County rated good (53.3%); 1 (1.1%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings


Structure	Prestressed concrete stringer or multi-beam girder
Length	about 375 ft
Location	8.6 S.W. of Jct U.S. 385
NBI structure number	311660000000000
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
U.S. 56 over Creek	1936	5,900	Good
U.S. 56 over BNSF R.R. Under	1988	4,600	Fair
U.S. 56 over Drainage Canal Boisecity	1951	4,000	Fair
U.S. 287 over Adobe Draw	2010	3,257	Good
U.S. 287 over Cimarron Valley RR Under	2011	2,700	Fair
U.S. 287 over Creek	1935	2,300	Good