US Bridges

I85BUS US29 over SR1121

Fair

Guilford County, North Carolina · 0.2 Mi. N. of JCT.US220 · Structure no. 000000000810202

Built
1975
50 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
184 ft
3 main spans
Daily traffic
42,000
2022 count
Owner
State
State Highway Agency

About this bridge

I85BUS US29 over SR1121 is a steel stringer/multi-beam or girder carrying I85BUS US29 over SR1121 in Guilford County, North Carolina. It was built in 1975, so it is 50 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 42,000 vehicles a day, roughly 12% of them trucks, projected to reach 84,000 by 2040. The structure is 184 ft (56 m) long and 144 ft wide.

Location

Open in Google Maps
CarriesI85BUS US29
CrossesSR1121
Location0.2 Mi. N. of JCT.US220
RouteInterstate 85
CountyGuilford County
StateNorth Carolina
Coordinates36.01978, -79.82331
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72 US tons
Inventory rating43 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length184 ft (56 m)
Longest span107 ft (32.6 m)
Deck width144 ft (43.8 m)
Roadway width140 ft (42.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic42,000 (2022)
Projected traffic84,000 by 2040
Trucks12%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I85BUS US29 over SR1121 built?

It was built in 1975, making it 50 years old in 2025.

What condition is I85BUS US29 over SR1121 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 2024.

How much traffic does I85BUS US29 over SR1121 carry?

About 42,000 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is I85BUS US29 over SR1121?

The structure is 184 ft (56 m) long with a longest span of 107 ft (32.6 m) and a deck 144 ft wide.

Who owns I85BUS US29 over SR1121?

It is owned by the State Highway Agency.