US Bridges

I-85BUS US29 US70 over Deep River

Good

Guilford County, North Carolina · 0.6 Mi. N. Jct. SR1135 · Structure no. 000000000810237

Built
2020
5 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
221 ft
3 main spans
Daily traffic
17,000
2021 count
Owner
State
State Highway Agency

About this bridge

I-85BUS US29 US70 over Deep River is a prestressed concrete stringer/multi-beam or girder carrying I-85BUS US29 US70 over Deep River in Guilford County, North Carolina. It was built in 2020, so it is 5 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 17,000 vehicles a day, roughly 12% of them trucks, projected to reach 34,000 by 2040. The structure is 221 ft (67.3 m) long and 41 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI-85BUS US29 US70
CrossesDeep River
Location0.6 Mi. N. Jct. SR1135
RouteInterstate 85
Coordinates35.97265, -79.91775
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 protection7 GoodSome minor problems.
Last inspectionApril 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 US tons
Inventory rating68.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length221 ft (67.3 m)
Longest span98 ft (29.8 m)
Deck width41 ft (12.5 m)
Roadway width38 ft (11.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,000 (2021)
Projected traffic34,000 by 2040
Trucks12%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-85BUS US29 US70 over Deep River built?

It was built in 2020, making it 5 years old in 2025.

What condition is I-85BUS US29 US70 over Deep River 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 April 2024.

How much traffic does I-85BUS US29 US70 over Deep River carry?

About 17,000 vehicles per day (2021 count), of which roughly 12% are trucks.

How long is I-85BUS US29 US70 over Deep River?

The structure is 221 ft (67.3 m) long with a longest span of 98 ft (29.8 m) and a deck 41 ft wide.

Who owns I-85BUS US29 US70 over Deep River?

It is owned by the State Highway Agency.