US Bridges

SR1740 over Mill Swamp

Fair

Sampson County, North Carolina · 0.4 Mi. N. Jct. SR1904 · Structure no. 000000001630247

Built
1991
34 years old
Condition
Fair
inspected November 2024
Type
Slab
Prestressed Concrete
Length
107 ft
3 main spans
Daily traffic
600
2022 count
Owner
State
State Highway Agency

About this bridge

SR1740 over Mill Swamp is a prestressed concrete slab carrying SR1740 over Mill Swamp in Sampson County, North Carolina. It was built in 1991, so it is 34 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 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 600 vehicles a day, roughly 6% of them trucks, projected to reach 1,200 by 2040. The structure is 107 ft (32.6 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesSR1740
CrossesMill Swamp
Location0.4 Mi. N. Jct. SR1904
RouteState Highway 1740
CountySampson County
StateNorth Carolina
Coordinates35.05199, -78.22392
Functional classRural Minor Collector

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.
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 inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating61 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20 + Mod
Structure length107 ft (32.6 m)
Longest span44 ft (13.4 m)
Deck width30 ft (9.1 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic600 (2022)
Projected traffic1,200 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 SR1740 over Mill Swamp built?

It was built in 1991, making it 34 years old in 2025.

What condition is SR1740 over Mill 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 November 2024.

How much traffic does SR1740 over Mill Swamp carry?

About 600 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is SR1740 over Mill Swamp?

The structure is 107 ft (32.6 m) long with a longest span of 44 ft (13.4 m) and a deck 30 ft wide.

Who owns SR1740 over Mill Swamp?

It is owned by the State Highway Agency.