US Bridges

SR1339 over Alligator Swamp

FairPosted for load

Brunswick County, North Carolina · 0.2 Mi.W.Jct. SR1335 · Structure no. 000000000190092

Built
1962
63 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
53 ft
3 main spans
Daily traffic
290
2016 count
Owner
State
State Highway Agency

About this bridge

SR1339 over Alligator Swamp is a wood or timber stringer/multi-beam or girder carrying SR1339 over Alligator Swamp in Brunswick County, North Carolina. It was built in 1962, so it is 63 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. Its operating status is: posted for load restriction.

It carries about 290 vehicles a day, roughly 6% of them trucks, projected to reach 580 by 2040. The structure is 53 ft (16.1 m) long and 27 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesSR1339
CrossesAlligator Swamp
Location0.2 Mi.W.Jct. SR1335
RouteState Highway 1339
CountyBrunswick County
StateNorth Carolina
Coordinates34.10588, -78.46416
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
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 rating29 US tons
Inventory rating17 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length53 ft (16.1 m)
Longest span17 ft (5.1 m)
Deck width27 ft (8.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic290 (2016)
Projected traffic580 by 2040
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR1339 over Alligator Swamp built?

It was built in 1962, making it 63 years old in 2025.

What condition is SR1339 over Alligator 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 June 2023.

How much traffic does SR1339 over Alligator Swamp carry?

About 290 vehicles per day (2016 count), of which roughly 6% are trucks.

How long is SR1339 over Alligator Swamp?

The structure is 53 ft (16.1 m) long with a longest span of 17 ft (5.1 m) and a deck 27 ft wide.

Who owns SR1339 over Alligator Swamp?

It is owned by the State Highway Agency.