US Bridges

SR1103 over Conoconnara Swamp

Good

Halifax County, North Carolina · 0.3MI.W.JCT.SR1126 · Structure no. 000000000830025

Built
2009
16 years old
Condition
Good
inspected May 2023
Type
Slab
Prestressed Concrete
Length
137 ft
3 main spans
Daily traffic
180
2015 count
Owner
State
State Highway Agency

About this bridge

SR1103 over Conoconnara Swamp is a prestressed concrete slab carrying SR1103 over Conoconnara Swamp in Halifax County, North Carolina. It was built in 2009, so it is 16 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 180 vehicles a day, roughly 6% of them trucks, projected to reach 360 by 2040. The structure is 137 ft (41.7 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesSR1103
CrossesConoconnara Swamp
Location0.3MI.W.JCT.SR1126
RouteState Highway 1103
Coordinates36.24443, -77.56119
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 alignment8: Equal to present desirable criteria
Operating rating81.9 US tons
Inventory rating48 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHL 93
Structure length137 ft (41.7 m)
Longest span54 ft (16.4 m)
Deck width30 ft (9.1 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic180 (2015)
Projected traffic360 by 2040
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 SR1103 over Conoconnara Swamp built?

It was built in 2009, making it 16 years old in 2025.

What condition is SR1103 over Conoconnara 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 May 2023.

How much traffic does SR1103 over Conoconnara Swamp carry?

About 180 vehicles per day (2015 count), of which roughly 6% are trucks.

How long is SR1103 over Conoconnara Swamp?

The structure is 137 ft (41.7 m) long with a longest span of 54 ft (16.4 m) and a deck 30 ft wide.

Who owns SR1103 over Conoconnara Swamp?

It is owned by the State Highway Agency.