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State Highway 58A over Canton Lake Spillway

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

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

State Highway 58A over Canton Lake Spillway in Blaine County, Oklahoma, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 4 (poor condition) on the 0-9 scale.
It was built in 1948 and reconstructed in 2017, making it 77 years old at the 2025 inventory.
It carries about 730 vehicles a day (traffic count year 2024).
It is one of 19 of the 272 inventoried bridges in Blaine County rated poor (7.0%); 19 (7.0%) 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	Concrete girder and floorbeam
Length	about 785 ft
Location	2 Mi N. of Canton
NBI structure number	CEPSWTOKCANTONL
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
U.S. 270 over Creek	1937	5,100	Good
U.S. 270 over Creek	1984	5,100	Good
U.S. 270 over Creek	1930	5,000	Good
U.S. 270 over N. Canadian River	1971	5,000	Fair
U.S. 270 over N. Canadian River Oflow	1971	5,000	Good
S.H. 3 over Creek	1984	5,000	Good