US Bridges

SR1799 over Mingo Swamp

Fair

Harnett County, North Carolina · 0.4 MI E JCT SR1789 · Structure no. 000000000850142

Built
1979
46 years old
Condition
Fair
inspected May 2024
Type
Slab
Prestressed Concrete
Length
91 ft
3 main spans
Daily traffic
950
2021 count
Owner
State
State Highway Agency

About this bridge

SR1799 over Mingo Swamp is a prestressed concrete slab carrying SR1799 over Mingo Swamp in Harnett County, North Carolina. It was built in 1979, so it is 46 years old, older 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 5 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 950 vehicles a day, roughly 6% of them trucks, projected to reach 1,900 by 2040. The structure is 91 ft (27.7 m) long and 36 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesSR1799
CrossesMingo Swamp
Location0.4 MI E JCT SR1789
RouteState Highway 1799
CountyHarnett County
StateNorth Carolina
Coordinates35.31378, -78.54286
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating75.9 US tons
Inventory rating45 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20 + Mod
Structure length91 ft (27.7 m)
Longest span29 ft (8.8 m)
Deck width36 ft (10.9 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic950 (2021)
Projected traffic1,900 by 2040
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 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 SR1799 over Mingo Swamp built?

It was built in 1979, making it 46 years old in 2025.

What condition is SR1799 over Mingo Swamp 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 May 2024.

How much traffic does SR1799 over Mingo Swamp carry?

About 950 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is SR1799 over Mingo Swamp?

The structure is 91 ft (27.7 m) long with a longest span of 29 ft (8.8 m) and a deck 36 ft wide.

Who owns SR1799 over Mingo Swamp?

It is owned by the State Highway Agency.