US Bridges

N8 over S Fk Big Nemaha River

Fair

Richardson County, Nebraska · 3NE Dubois · Structure no. S008 12578

Built
1993
32 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
383 ft
3 main spans
Daily traffic
500
2018 count
Owner
State
State Highway Agency

About this bridge

N8 over S Fk Big Nemaha River is a steel continuous stringer/multi-beam or girder carrying N8 over S Fk Big Nemaha River in Richardson County, Nebraska. It was built in 1993, so it is 32 years old, younger than the Nebraska average of 47.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 500 vehicles a day, roughly 13% of them trucks, projected to reach 650 by 2038. The structure is 383 ft (116.7 m) long and 38 ft wide. If it were closed, the detour would be 49.7 mi (80 km).

Location

Open in Google Maps
CarriesN8
CrossesS Fk Big Nemaha River
Location3NE Dubois
RouteState Highway 8
CountyRichardson County
StateNebraska
Coordinates40.051, -96.0033
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.4 US tons
Inventory rating35.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length383 ft (116.7 m)
Longest span145 ft (44.2 m)
Deck width38 ft (11.7 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2018)
Projected traffic650 by 2038
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed49.7 mi (80 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 N8 over S Fk Big Nemaha River built?

It was built in 1993, making it 32 years old in 2025.

What condition is N8 over S Fk Big Nemaha River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2024.

How much traffic does N8 over S Fk Big Nemaha River carry?

About 500 vehicles per day (2018 count), of which roughly 13% are trucks.

How long is N8 over S Fk Big Nemaha River?

The structure is 383 ft (116.7 m) long with a longest span of 145 ft (44.2 m) and a deck 38 ft wide.

Who owns N8 over S Fk Big Nemaha River?

It is owned by the State Highway Agency.