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N3520 over Creek Whiskey Creek Rd

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

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

N3520 over Creek Whiskey Creek Rd in Marshall 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 8 (very good condition) on the 0-9 scale.
It was built in 2010, making it 15 years old at the 2025 inventory.
It carries about 150 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 41 of the 79 inventoried bridges in Marshall County rated good (51.9%); 9 (11.4%) 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 tee beam
Length	about 150 ft
Location	2E .3S of Madill
NBI structure number	276240000000000
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. 70 over Whiskey Creek	1933	10,200	Fair
S.H. 199 over Glasses Creek	1960	8,600	Fair
S.H. 99 over Whiskey Creek	1960	6,700	Fair
U.S. 70 over Little Glasses Creek	1946	6,300	Fair
U.S. 70 over Creek	1958	6,300	Good
U.S. 70 over Creek	1935	6,200	Good