US Bridges

I40 over Mill Creek

Good

Johnston County, North Carolina · 1.5 MI.E.JCT.SR1116 · Structure no. 000000001010476

Built
1988
37 years old
Condition
Good
inspected October 2023
Type
Culvert
Concrete Continuous
Length
42 ft
4 main spans
Daily traffic
20,000
2020 count
Owner
State
State Highway Agency

About this bridge

I40 over Mill Creek is a concrete continuous culvert carrying I40 over Mill Creek in Johnston County, North Carolina. It was built in 1988, so it is 37 years old, younger than the North Carolina average of 38.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 20,000 vehicles a day, roughly 23% of them trucks, projected to reach 40,000 by 2040. The structure is 42 ft (12.8 m) long. If it were closed, the detour would be 3.7 mi (6 km).

CarriesI40
CrossesMill Creek
Location1.5 MI.E.JCT.SR1116
RouteInterstate 40
Coordinates35.29166, -78.40566
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating96.9 US tons
Inventory rating75 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans4
Design loadHS 20 + Mod
Structure length42 ft (12.8 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,000 (2020)
Projected traffic40,000 by 2040
Trucks23%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was I40 over Mill Creek built?

It was built in 1988, making it 37 years old in 2025.

What condition is I40 over Mill Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2023.

How much traffic does I40 over Mill Creek carry?

About 20,000 vehicles per day (2020 count), of which roughly 23% are trucks.

How long is I40 over Mill Creek?

The structure is 42 ft (12.8 m) long with a longest span of 10 ft (3 m).

Who owns I40 over Mill Creek?

It is owned by the State Highway Agency.