US Bridges

N105 over Big Nemaha River N Fk

Fair

Richardson County, Nebraska · In Humbolt · Structure no. S105 00703

Built
1965
60 years old, rebuilt 2016
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
342 ft
3 main spans
Daily traffic
455
2018 count
Owner
State
State Highway Agency

About this bridge

N105 over Big Nemaha River N Fk is a steel continuous stringer/multi-beam or girder carrying N105 over Big Nemaha River N Fk in Richardson County, Nebraska. It was built in 1965 and reconstructed in 2016, so it is 60 years old, older 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 455 vehicles a day, roughly 11% of them trucks, projected to reach 614 by 2038. The structure is 342 ft (104.3 m) long and 33 ft wide. If it were closed, the detour would be 68.4 mi (110 km).

CarriesN105
CrossesBig Nemaha River N Fk
LocationIn Humbolt
RouteState Highway 105
Coordinates40.1571, -95.9449
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.7 US tons
Inventory rating37.5 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length342 ft (104.3 m)
Longest span140 ft (42.7 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic455 (2018)
Projected traffic614 by 2038
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed68.4 mi (110 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 N105 over Big Nemaha River N Fk built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 2016.

What condition is N105 over Big Nemaha River N Fk 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 N105 over Big Nemaha River N Fk carry?

About 455 vehicles per day (2018 count), of which roughly 11% are trucks.

How long is N105 over Big Nemaha River N Fk?

The structure is 342 ft (104.3 m) long with a longest span of 140 ft (42.7 m) and a deck 33 ft wide.

Who owns N105 over Big Nemaha River N Fk?

It is owned by the State Highway Agency.