US Bridges

SR1147 over Whiteoak Branch

Fair

Johnston County, North Carolina · 0.5MI. N. Jct. SR1144 · Structure no. 000000001010342

Built
1982
43 years old
Condition
Fair
inspected September 2023
Type
Culvert
Steel
Length
24 ft
3 main spans
Daily traffic
80
2019 count
Owner
State
State Highway Agency

About this bridge

SR1147 over Whiteoak Branch is a steel culvert carrying SR1147 over Whiteoak Branch in Johnston County, North Carolina. It was built in 1982, so it is 43 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 80 vehicles a day, roughly 6% of them trucks, projected to reach 160 by 2040. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSR1147
CrossesWhiteoak Branch
Location0.5MI. N. Jct. SR1144
RouteState Highway 1147
CountyJohnston County
StateNorth Carolina
Coordinates35.35633, -78.38741
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
Channel and channel protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
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
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating94.9 US tons
Inventory rating73 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span6 ft (1.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (2019)
Projected traffic160 by 2040
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 SR1147 over Whiteoak Branch built?

It was built in 1982, making it 43 years old in 2025.

What condition is SR1147 over Whiteoak Branch 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 September 2023.

How much traffic does SR1147 over Whiteoak Branch carry?

About 80 vehicles per day (2019 count), of which roughly 6% are trucks.

How long is SR1147 over Whiteoak Branch?

The structure is 24 ft (7.3 m) long with a longest span of 6 ft (1.8 m).

Who owns SR1147 over Whiteoak Branch?

It is owned by the State Highway Agency.