US Bridges

SR1121 over Northeast Creek

Fair

Durham County, North Carolina · 0.5 Mi. S. Jct. SR1945 · Structure no. 000000000630268

Built
1955
70 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete Continuous
Length
40 ft
3 main spans
Daily traffic
11,000
2021 count
Owner
State
State Highway Agency

About this bridge

SR1121 over Northeast Creek is a concrete continuous culvert carrying SR1121 over Northeast Creek in Durham County, North Carolina. It was built in 1955, so it is 70 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 6 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 11,000 vehicles a day, roughly 6% of them trucks, projected to reach 22,000 by 2040. The structure is 40 ft (12.1 m) long. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesSR1121
CrossesNortheast Creek
Location0.5 Mi. S. Jct. SR1945
RouteState Highway 1121
CountyDurham County
StateNorth Carolina
Coordinates35.9248, -78.88065
Functional classUrban 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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
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
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46 US tons
Inventory rating35.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20 + Mod
Structure length40 ft (12.1 m)
Longest span9 ft (2.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,000 (2021)
Projected traffic22,000 by 2040
Trucks6%
Lanes on structure3
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 SR1121 over Northeast Creek built?

It was built in 1955, making it 70 years old in 2025.

What condition is SR1121 over Northeast Creek 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 SR1121 over Northeast Creek carry?

About 11,000 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is SR1121 over Northeast Creek?

The structure is 40 ft (12.1 m) long with a longest span of 9 ft (2.7 m).

Who owns SR1121 over Northeast Creek?

It is owned by the State Highway Agency.