US Bridges

SR1528 over Dunn Swamp

Fair

Columbus County, North Carolina · 0.8 Mi. N. of JCT.US76 · Structure no. 000000000470293

Built
1966
59 years old
Condition
Fair
inspected September 2024
Type
Culvert
Steel
Length
29 ft
3 main spans
Daily traffic
220
2018 count
Owner
State
State Highway Agency

About this bridge

SR1528 over Dunn Swamp is a steel culvert carrying SR1528 over Dunn Swamp in Columbus County, North Carolina. It was built in 1966, so it is 59 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 220 vehicles a day, roughly 6% of them trucks, projected to reach 440 by 2040. The structure is 29 ft (8.8 m) long. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesSR1528
CrossesDunn Swamp
Location0.8 Mi. N. of JCT.US76
RouteState Highway 1528
CountyColumbus County
StateNorth Carolina
Coordinates34.34175, -78.84837
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadHS 20 + Mod
Structure length29 ft (8.8 m)
Longest span8 ft (2.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic220 (2018)
Projected traffic440 by 2040
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR1528 over Dunn Swamp built?

It was built in 1966, making it 59 years old in 2025.

What condition is SR1528 over Dunn 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 September 2024.

How much traffic does SR1528 over Dunn Swamp carry?

About 220 vehicles per day (2018 count), of which roughly 6% are trucks.

How long is SR1528 over Dunn Swamp?

The structure is 29 ft (8.8 m) long with a longest span of 8 ft (2.4 m).

Who owns SR1528 over Dunn Swamp?

It is owned by the State Highway Agency.