US Bridges

I77 Nbl over Patterson Creek

Fair

Iredell County, North Carolina · 0.8 Mi. N. Jct. SR1890 · Structure no. 000000000970198

Built
1973
52 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
208 ft
4 main spans
Daily traffic
19,000
2021 count
Owner
State
State Highway Agency

About this bridge

I77 Nbl over Patterson Creek is a steel stringer/multi-beam or girder carrying I77 Nbl over Patterson Creek in Iredell County, North Carolina. It was built in 1973, so it is 52 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 19,000 vehicles a day, roughly 23% of them trucks, projected to reach 38,000 by 2040. The structure is 208 ft (63.3 m) long and 42 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI77 Nbl
CrossesPatterson Creek
Location0.8 Mi. N. Jct. SR1890
RouteInterstate 77
Coordinates35.92824, -80.85519
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85 US tons
Inventory rating50.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length208 ft (63.3 m)
Longest span51 ft (15.5 m)
Deck width42 ft (12.9 m)
Roadway width37 ft (11.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,000 (2021)
Projected traffic38,000 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was I77 Nbl over Patterson Creek built?

It was built in 1973, making it 52 years old in 2025.

What condition is I77 Nbl over Patterson 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 May 2024.

How much traffic does I77 Nbl over Patterson Creek carry?

About 19,000 vehicles per day (2021 count), of which roughly 23% are trucks.

How long is I77 Nbl over Patterson Creek?

The structure is 208 ft (63.3 m) long with a longest span of 51 ft (15.5 m) and a deck 42 ft wide.

Who owns I77 Nbl over Patterson Creek?

It is owned by the State Highway Agency.