US Bridges

I785S I840W over South Buffalo Creek

Good

Guilford County, North Carolina · 0.54 Mi. S. Jct. US70 · Structure no. 000000000810985

Built
2002
23 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
320 ft
4 main spans
Daily traffic
13,750
2019 count
Owner
State
State Highway Agency

About this bridge

I785S I840W over South Buffalo Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying I785S I840W over South Buffalo Creek in Guilford County, North Carolina. It was built in 2002, so it is 23 years old, younger 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 13,750 vehicles a day, roughly 16% of them trucks, projected to reach 27,500 by 2040. The structure is 320 ft (97.5 m) long and 40 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI785S I840W
CrossesSouth Buffalo Creek
Location0.54 Mi. S. Jct. US70
RouteInterstate 785
Coordinates36.08231, -79.69481
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
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 evaluation8: Equal to present desirable 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 rating89.9 US tons
Inventory rating48 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length320 ft (97.5 m)
Longest span88 ft (26.8 m)
Deck width40 ft (12.3 m)
Roadway width36 ft (11.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,750 (2019)
Projected traffic27,500 by 2040
Trucks16%
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 I785S I840W over South Buffalo Creek built?

It was built in 2002, making it 23 years old in 2025.

What condition is I785S I840W over South Buffalo 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 May 2024.

How much traffic does I785S I840W over South Buffalo Creek carry?

About 13,750 vehicles per day (2019 count), of which roughly 16% are trucks.

How long is I785S I840W over South Buffalo Creek?

The structure is 320 ft (97.5 m) long with a longest span of 88 ft (26.8 m) and a deck 40 ft wide.

Who owns I785S I840W over South Buffalo Creek?

It is owned by the State Highway Agency.