US Bridges

US421 N. Ramp over Harmon Mill (smith) Cree

Good

Forsyth County, North Carolina · 0.4M. N. Jct. US421 · Structure no. 000000000670672

Built
2020
5 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
384 ft
5 main spans
Daily traffic
4,500
2022 count
Owner
State
State Highway Agency

About this bridge

US421 N. Ramp over Harmon Mill (smith) Cree is a prestressed concrete continuous stringer/multi-beam or girder carrying US421 N. Ramp over Harmon Mill (smith) Cree in Forsyth 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 4,500 vehicles a day, roughly 12% of them trucks, projected to reach 9,000 by 2040. The structure is 384 ft (117 m) long and 41 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesUS421 N. Ramp
CrossesHarmon Mill (smith) Cree
Location0.4M. N. Jct. US421
RouteU.S. Route 421
CountyForsyth County
StateNorth Carolina
Coordinates36.11637, -80.12869
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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74 US tons
Inventory rating48 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHL 93
Structure length384 ft (117 m)
Longest span92 ft (28 m)
Deck width41 ft (12.5 m)
Roadway width38 ft (11.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,500 (2022)
Projected traffic9,000 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 SystemNo

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 US421 N. Ramp over Harmon Mill (smith) Cree built?

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

What condition is US421 N. Ramp over Harmon Mill (smith) Cree 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 US421 N. Ramp over Harmon Mill (smith) Cree carry?

About 4,500 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is US421 N. Ramp over Harmon Mill (smith) Cree?

The structure is 384 ft (117 m) long with a longest span of 92 ft (28 m) and a deck 41 ft wide.

Who owns US421 N. Ramp over Harmon Mill (smith) Cree?

It is owned by the State Highway Agency.