US Bridges

I40 I85 over Rock Creek

Fair

Guilford County, North Carolina · 0.6 Mi. N. Jct. SR3055 · Structure no. 000000000810380

Built
1954
71 years old, rebuilt 1994
Condition
Fair
inspected July 2024
Type
Culvert
Concrete Continuous
Length
66 ft
4 main spans
Daily traffic
119,000
2022 count
Owner
State
State Highway Agency

About this bridge

I40 I85 over Rock Creek is a concrete continuous culvert carrying I40 I85 over Rock Creek in Guilford County, North Carolina. It was built in 1954 and reconstructed in 1994, so it is 71 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 119,000 vehicles a day, roughly 23% of them trucks, projected to reach 238,000 by 2040. The structure is 66 ft (20.1 m) long. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesI40 I85
CrossesRock Creek
Location0.6 Mi. N. Jct. SR3055
RouteInterstate 40
CountyGuilford County
StateNorth Carolina
Coordinates36.06038, -79.59555
Functional classRural Principal Arterial - Interstate

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45 US tons
Inventory rating34.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans4
Design loadHS 20 + Mod
Structure length66 ft (20.1 m)
Longest span11 ft (3.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic119,000 (2022)
Projected traffic238,000 by 2040
Trucks23%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I40 I85 over Rock Creek built?

It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1994.

What condition is I40 I85 over Rock 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 2024.

How much traffic does I40 I85 over Rock Creek carry?

About 119,000 vehicles per day (2022 count), of which roughly 23% are trucks.

How long is I40 I85 over Rock Creek?

The structure is 66 ft (20.1 m) long with a longest span of 11 ft (3.3 m).

Who owns I40 I85 over Rock Creek?

It is owned by the State Highway Agency.