US Bridges

SR1828 over Back Swamp

Good

Duplin County, North Carolina · 0.6 Mi. N. of JCT SR1827 · Structure no. 000000000610187

Built
2024
1 years old
Condition
Good
inspected November 2024
Type
Slab
Prestressed Concrete
Length
228 ft
4 main spans
Daily traffic
900
2022 count
Owner
State
State Highway Agency

About this bridge

SR1828 over Back Swamp is a prestressed concrete slab carrying SR1828 over Back Swamp in Duplin County, North Carolina. It was built in 2024, so it is 1 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 900 vehicles a day, roughly 6% of them trucks, projected to reach 1,800 by 2040. The structure is 228 ft (69.4 m) long and 33 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesSR1828
CrossesBack Swamp
Location0.6 Mi. N. of JCT SR1827
RouteState Highway 1828
CountyDuplin County
StateNorth Carolina
Coordinates34.75832, -77.70819
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating87 US tons
Inventory rating66.9 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans4
Design loadHL 93
Structure length228 ft (69.4 m)
Longest span57 ft (17.3 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic900 (2022)
Projected traffic1,800 by 2040
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 SR1828 over Back Swamp built?

It was built in 2024, making it 1 years old in 2025.

What condition is SR1828 over Back 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 November 2024.

How much traffic does SR1828 over Back Swamp carry?

About 900 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is SR1828 over Back Swamp?

The structure is 228 ft (69.4 m) long with a longest span of 57 ft (17.3 m) and a deck 33 ft wide.

Who owns SR1828 over Back Swamp?

It is owned by the State Highway Agency.