US Bridges

N50 over Negro Branch

Good

Pawnee County, Nebraska · 2S Dubois · Structure no. S050 00028

Built
2023
2 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
107 ft
1 main span
Daily traffic
1,135
2018 count
Owner
State
State Highway Agency

About this bridge

N50 over Negro Branch is a prestressed concrete continuous stringer/multi-beam or girder carrying N50 over Negro Branch in Pawnee County, Nebraska. It was built in 2023, so it is 2 years old, younger than the Nebraska average of 47.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,135 vehicles a day, roughly 12% of them trucks, projected to reach 1,532 by 2038. The structure is 107 ft (32.6 m) long and 45 ft wide. If it were closed, the detour would be 31.1 mi (50 km).

Location

Open in Google Maps
CarriesN50
CrossesNegro Branch
Location2S Dubois
RouteState Highway 50
CountyPawnee County
StateNebraska
Coordinates40.0046, -96.0485
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.9 US tons
Inventory rating37.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length107 ft (32.6 m)
Longest span105 ft (32 m)
Deck width45 ft (13.6 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,135 (2018)
Projected traffic1,532 by 2038
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.1 mi (50 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was N50 over Negro Branch built?

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

What condition is N50 over Negro Branch 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 June 2024.

How much traffic does N50 over Negro Branch carry?

About 1,135 vehicles per day (2018 count), of which roughly 12% are trucks.

How long is N50 over Negro Branch?

The structure is 107 ft (32.6 m) long with a longest span of 105 ft (32 m) and a deck 45 ft wide.

Who owns N50 over Negro Branch?

It is owned by the State Highway Agency.