US Bridges

SR4121 over Ncrr Deep River Trib.

Good

Guilford County, North Carolina · 0.2 MI E JCT Scientist ST · Structure no. 000000000811271

Built
2023
2 years old
Condition
Good
inspected March 2023
Type
Slab
Prestressed Concrete
Length
642 ft
6 main spans
Daily traffic
100
2018 count
Owner
State
State Highway Agency

About this bridge

SR4121 over Ncrr Deep River Trib. is a prestressed concrete slab carrying SR4121 over Ncrr Deep River Trib. in Guilford County, North Carolina. It was built in 2023, so it is 2 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 100 vehicles a day, roughly 7% of them trucks, projected to reach 200 by 2040. The structure is 642 ft (195.6 m) long and 40 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesSR4121
CrossesNcrr Deep River Trib.
Location0.2 MI E JCT Scientist ST
RouteState Highway 4121
CountyGuilford County
StateNorth Carolina
Coordinates35.984, -79.946
Functional classUrban Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87 US tons
Inventory rating50.9 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHL 93
Structure length642 ft (195.6 m)
Longest span106 ft (32.3 m)
Deck width40 ft (12.1 m)
Roadway width36 ft (10.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2018)
Projected traffic200 by 2040
Trucks7%
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 SR4121 over Ncrr Deep River Trib. built?

It was built in 2023, making it 2 years old in 2025.

What condition is SR4121 over Ncrr Deep River Trib. 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 March 2023.

How much traffic does SR4121 over Ncrr Deep River Trib. carry?

About 100 vehicles per day (2018 count), of which roughly 7% are trucks.

How long is SR4121 over Ncrr Deep River Trib.?

The structure is 642 ft (195.6 m) long with a longest span of 106 ft (32.3 m) and a deck 40 ft wide.

Who owns SR4121 over Ncrr Deep River Trib.?

It is owned by the State Highway Agency.