US Bridges

I-77 over Ut to South Deep Creek

Good

Yadkin County, North Carolina · .9 MI.N.JCT.US421 · Structure no. 000000001970064

Built
1974
51 years old
Condition
Good
inspected July 2021
Type
Culvert
Concrete Continuous
Length
29 ft
2 main spans
Daily traffic
30,000
2015 count
Owner
State
State Highway Agency

About this bridge

I-77 over Ut to South Deep Creek is a concrete continuous culvert carrying I-77 over Ut to South Deep Creek in Yadkin County, North Carolina. It was built in 1974, so it is 51 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 30,000 vehicles a day, roughly 23% of them trucks, projected to reach 60,000 by 2040. The structure is 29 ft (8.8 m) long. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI-77
CrossesUt to South Deep Creek
Location.9 MI.N.JCT.US421
RouteInterstate 77
Coordinates36.13474, -80.81029
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionJuly 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.9 US tons
Inventory rating49.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length29 ft (8.8 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30,000 (2015)
Projected traffic60,000 by 2040
Trucks23%
Lanes on structure4
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-77 over Ut to South Deep Creek built?

It was built in 1974, making it 51 years old in 2025.

What condition is I-77 over Ut to South Deep Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2021.

How much traffic does I-77 over Ut to South Deep Creek carry?

About 30,000 vehicles per day (2015 count), of which roughly 23% are trucks.

How long is I-77 over Ut to South Deep Creek?

The structure is 29 ft (8.8 m) long with a longest span of 10 ft (3 m).

Who owns I-77 over Ut to South Deep Creek?

It is owned by the State Highway Agency.