US Bridges

N8 over Big Blue River

Good

Gage County, Nebraska · 1W Barneston · Structure no. S008 08619

Built
2012
13 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
462 ft
3 main spans
Daily traffic
450
2018 count
Owner
State
State Highway Agency

About this bridge

N8 over Big Blue River is a prestressed concrete continuous stringer/multi-beam or girder carrying N8 over Big Blue River in Gage County, Nebraska. It was built in 2012, so it is 13 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 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 450 vehicles a day, roughly 9% of them trucks, projected to reach 495 by 2038. The structure is 462 ft (140.8 m) long and 39 ft wide. If it were closed, the detour would be 118.1 mi (190 km).

CarriesN8
CrossesBig Blue River
Location1W Barneston
RouteState Highway 8
Coordinates40.0448, -96.5863
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
Deck8 Very GoodNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation9: Superior to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating67.2 US tons
Inventory rating47.4 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length462 ft (140.8 m)
Longest span160 ft (48.8 m)
Deck width39 ft (11.8 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic450 (2018)
Projected traffic495 by 2038
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed118.1 mi (190 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 N8 over Big Blue River built?

It was built in 2012, making it 13 years old in 2025.

What condition is N8 over Big Blue 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 July 2024.

How much traffic does N8 over Big Blue River carry?

About 450 vehicles per day (2018 count), of which roughly 9% are trucks.

How long is N8 over Big Blue River?

The structure is 462 ft (140.8 m) long with a longest span of 160 ft (48.8 m) and a deck 39 ft wide.

Who owns N8 over Big Blue River?

It is owned by the State Highway Agency.