US Bridges

US13 over Middle Swamp

Fair

Greene County, North Carolina · 0.4 Mi.N. Jct. SR1345 · Structure no. 000000000790041

Built
1980
45 years old
Condition
Fair
inspected January 2024
Type
Slab
Prestressed Concrete
Length
102 ft
3 main spans
Daily traffic
5,400
2022 count
Owner
State
State Highway Agency

About this bridge

US13 over Middle Swamp is a prestressed concrete slab carrying US13 over Middle Swamp in Greene County, North Carolina. It was built in 1980, so it is 45 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 5,400 vehicles a day, roughly 8% of them trucks, projected to reach 10,800 by 2040. The structure is 102 ft (31 m) long and 44 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesUS13
CrossesMiddle Swamp
Location0.4 Mi.N. Jct. SR1345
RouteU.S. Route 13
CountyGreene County
StateNorth Carolina
Coordinates35.54067, -77.56666
Functional classRural Minor Arterial

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 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
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating93.9 US tons
Inventory rating56 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20 + Mod
Structure length102 ft (31 m)
Longest span39 ft (11.8 m)
Deck width44 ft (13.4 m)
Roadway width41 ft (12.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,400 (2022)
Projected traffic10,800 by 2040
Trucks8%
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 US13 over Middle Swamp built?

It was built in 1980, making it 45 years old in 2025.

What condition is US13 over Middle 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 January 2024.

How much traffic does US13 over Middle Swamp carry?

About 5,400 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is US13 over Middle Swamp?

The structure is 102 ft (31 m) long with a longest span of 39 ft (11.8 m) and a deck 44 ft wide.

Who owns US13 over Middle Swamp?

It is owned by the State Highway Agency.