US Bridges

SR1415 over Porter Swamp

Fair

Columbus County, North Carolina · 0.4 Mi. N. of Jct. SR1413 · Structure no. 000000000470285

Built
1996
29 years old
Condition
Fair
inspected April 2024
Type
Slab
Prestressed Concrete
Length
92 ft
3 main spans
Daily traffic
450
2021 count
Owner
State
State Highway Agency

About this bridge

SR1415 over Porter Swamp is a prestressed concrete slab carrying SR1415 over Porter Swamp in Columbus County, North Carolina. It was built in 1996, so it is 29 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 450 vehicles a day, roughly 6% of them trucks, projected to reach 900 by 2040. The structure is 92 ft (28 m) long and 30 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesSR1415
CrossesPorter Swamp
Location0.4 Mi. N. of Jct. SR1413
RouteState Highway 1415
CountyColumbus County
StateNorth Carolina
Coordinates34.31128, -78.90338
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating99 US tons
Inventory rating67.9 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20 + Mod
Structure length92 ft (28 m)
Longest span29 ft (8.8 m)
Deck width30 ft (9.1 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic450 (2021)
Projected traffic900 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 SR1415 over Porter Swamp built?

It was built in 1996, making it 29 years old in 2025.

What condition is SR1415 over Porter 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 April 2024.

How much traffic does SR1415 over Porter Swamp carry?

About 450 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is SR1415 over Porter Swamp?

The structure is 92 ft (28 m) long with a longest span of 29 ft (8.8 m) and a deck 30 ft wide.

Who owns SR1415 over Porter Swamp?

It is owned by the State Highway Agency.