US Bridges

US421S NC55E over Black River

Fair

Harnett County, North Carolina · 0.3 Mi.N. Jct. SR1719 · Structure no. 000000000850039

Built
1957
68 years old
Condition
Fair
inspected July 2023
Type
Tee Beam
Concrete
Length
128 ft
3 main spans
Daily traffic
7,000
2019 count
Owner
State
State Highway Agency

About this bridge

US421S NC55E over Black River is a concrete tee beam carrying US421S NC55E over Black River in Harnett County, North Carolina. It was built in 1957, so it is 68 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 7,000 vehicles a day, roughly 12% of them trucks, projected to reach 14,000 by 2040. The structure is 128 ft (39 m) long and 31 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesUS421S NC55E
CrossesBlack River
Location0.3 Mi.N. Jct. SR1719
RouteU.S. Route 421
CountyHarnett County
StateNorth Carolina
Coordinates35.32261, -78.64199
Functional classUrban Other Principal 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.9 US tons
Inventory rating40.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length128 ft (39 m)
Longest span41 ft (12.4 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,000 (2019)
Projected traffic14,000 by 2040
Trucks12%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

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 US421S NC55E over Black River built?

It was built in 1957, making it 68 years old in 2025.

What condition is US421S NC55E over Black River 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 July 2023.

How much traffic does US421S NC55E over Black River carry?

About 7,000 vehicles per day (2019 count), of which roughly 12% are trucks.

How long is US421S NC55E over Black River?

The structure is 128 ft (39 m) long with a longest span of 41 ft (12.4 m) and a deck 31 ft wide.

Who owns US421S NC55E over Black River?

It is owned by the State Highway Agency.