US Bridges

I-77 Nbl over Third Creek

Fair

Iredell County, North Carolina · 1.5 Mi. N. Jct. SR2342 · Structure no. 000000000970128

Built
1957
68 years old
Condition
Fair
inspected March 2024
Type
Tee Beam
Concrete
Length
200 ft
5 main spans
Daily traffic
28,250
2020 count
Owner
State
State Highway Agency

About this bridge

I-77 Nbl over Third Creek is a concrete tee beam carrying I-77 Nbl over Third Creek in Iredell 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 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 28,250 vehicles a day, roughly 23% of them trucks, projected to reach 56,500 by 2040. The structure is 200 ft (60.9 m) long and 33 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesI-77 Nbl
CrossesThird Creek
Location1.5 Mi. N. Jct. SR2342
RouteInterstate 77
CountyIredell County
StateNorth Carolina
Coordinates35.74608, -80.86014
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.9 US tons
Inventory rating37.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length200 ft (60.9 m)
Longest span38 ft (11.5 m)
Deck width33 ft (10.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,250 (2020)
Projected traffic56,500 by 2040
Trucks23%
Lanes on structure2
Traffic directionOne-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 I-77 Nbl over Third Creek built?

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

What condition is I-77 Nbl over Third 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 March 2024.

How much traffic does I-77 Nbl over Third Creek carry?

About 28,250 vehicles per day (2020 count), of which roughly 23% are trucks.

How long is I-77 Nbl over Third Creek?

The structure is 200 ft (60.9 m) long with a longest span of 38 ft (11.5 m) and a deck 33 ft wide.

Who owns I-77 Nbl over Third Creek?

It is owned by the State Highway Agency.