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I-40 over Stirrup Iron Creek

Wake County, North Carolina · rated Fair in the 2025 National Bridge Inventory

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

I-40 over Stirrup Iron Creek in Wake County, North Carolina, 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 1969 and reconstructed in 2007, making it 56 years old at the 2025 inventory.
It carries about 120,000 vehicles a day (traffic count year 2020).
Its listed owner is the state highway agency.
It is one of 300 of the 800 inventoried bridges in Wake County rated fair (37.5%); 42 (5.2%) 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

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


Structure	Continuous concrete culvert
Length	about 39 ft
Location	0.5 Mi. E. Jct. I-540
NBI structure number	000000001831207
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
I40 Wbl over Crabtree Creek	1969	133,000	Fair
I40 Wbl over SR1728	1981	133,000	Good
I440 over SR1676(LAKE Boone Trail)	1960	120,000	Fair
I440 over US70	1960	120,000	Fair
I40 over Big Branch Creek	1986	119,000	Fair
I40 over Brier Creek	1968	116,000	Fair