US Bridges

NC55 over Mingo Swamp

Good

Harnett County, North Carolina · 0.42 MI.E.JCT.SR1806 · Structure no. 000000000850053

Built
2010
15 years old
Condition
Good
inspected October 2024
Type
Slab
Prestressed Concrete
Length
90 ft
2 main spans
Daily traffic
4,100
2019 count
Owner
State
State Highway Agency

About this bridge

NC55 over Mingo Swamp is a prestressed concrete slab carrying NC55 over Mingo Swamp in Harnett County, North Carolina. It was built in 2010, so it is 15 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 4,100 vehicles a day, roughly 7% of them trucks, projected to reach 8,200 by 2040. The structure is 90 ft (27.4 m) long and 36 ft wide. If it were closed, the detour would be 5.6 mi (9 km).

Location

Open in Google Maps
CarriesNC55
CrossesMingo Swamp
Location0.42 MI.E.JCT.SR1806
RouteState Highway 55
CountyHarnett County
StateNorth Carolina
Coordinates35.29777, -78.5725
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating45 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHL 93
Structure length90 ft (27.4 m)
Longest span43 ft (13.1 m)
Deck width36 ft (10.9 m)
Roadway width32 ft (9.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,100 (2019)
Projected traffic8,200 by 2040
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5.6 mi (9 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was NC55 over Mingo Swamp built?

It was built in 2010, making it 15 years old in 2025.

What condition is NC55 over Mingo Swamp 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 2024.

How much traffic does NC55 over Mingo Swamp carry?

About 4,100 vehicles per day (2019 count), of which roughly 7% are trucks.

How long is NC55 over Mingo Swamp?

The structure is 90 ft (27.4 m) long with a longest span of 43 ft (13.1 m) and a deck 36 ft wide.

Who owns NC55 over Mingo Swamp?

It is owned by the State Highway Agency.