US Bridges

SR1399 over I40

Fair

Johnston County, North Carolina · 0.3 Miles East of Jct. Nc · Structure no. 000000001010468

Built
1987
38 years old
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
180 ft
4 main spans
Daily traffic
670
2016 count
Owner
State
State Highway Agency

About this bridge

SR1399 over I40 is a prestressed concrete stringer/multi-beam or girder carrying SR1399 over I40 in Johnston County, North Carolina. It was built in 1987, so it is 38 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 fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 670 vehicles a day, roughly 6% of them trucks, projected to reach 1,340 by 2040. The structure is 180 ft (54.8 m) long and 27 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesSR1399
CrossesI40
Location0.3 Miles East of Jct. Nc
RouteState Highway 1399
Coordinates35.47217, -78.54932
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87 US tons
Inventory rating45 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length180 ft (54.8 m)
Longest span62 ft (18.8 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic670 (2016)
Projected traffic1,340 by 2040
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR1399 over I40 built?

It was built in 1987, making it 38 years old in 2025.

What condition is SR1399 over I40 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in February 2025.

How much traffic does SR1399 over I40 carry?

About 670 vehicles per day (2016 count), of which roughly 6% are trucks.

How long is SR1399 over I40?

The structure is 180 ft (54.8 m) long with a longest span of 62 ft (18.8 m) and a deck 27 ft wide.

Who owns SR1399 over I40?

It is owned by the State Highway Agency.