I-40 over US 21

Iredell County, North Carolina · rated Good in the 2025 National Bridge Inventory

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

I-40 over US 21 in Iredell County, North Carolina, 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 2014, making it 11 years old at the 2025 inventory.
It carries about 31,500 vehicles a day (traffic count year 2019).
Its listed owner is the state highway agency.
It is one of 97 of the 333 inventoried bridges in Iredell County rated good (29.1%); 48 (14.4%) 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	Steel stringer or multi-beam girder
Length	about 159 ft
Location	.9 Mi.w.jct.i-77
NBI structure number	000000000970563
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
I77 over Lake Norman	2018	63,500	Good
I77 over Ut to Fourth Creek	1957	58,000	Fair
I-77 over Duck Creek	1970	56,500	Fair
I77 over Cornelius Creek	1966	54,000	Fair
I-40 over Ut to Fourth Creek	2022	41,500	Good
I77 over Fifth Creek	1973	38,500	Fair