US Bridges

N128 over Little Nemaha River

Good

Otoe County, Nebraska · 7W Lorton · Structure no. S128 00156

Built
1999
26 years old
Condition
Good
inspected February 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
250 ft
3 main spans
Daily traffic
785
2018 count
Owner
State
State Highway Agency

About this bridge

N128 over Little Nemaha River is a prestressed concrete continuous stringer/multi-beam or girder carrying N128 over Little Nemaha River in Otoe County, Nebraska. It was built in 1999, so it is 26 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 785 vehicles a day, roughly 10% of them trucks, projected to reach 1,060 by 2038. The structure is 250 ft (76.2 m) long and 38 ft wide. If it were closed, the detour would be 31.1 mi (50 km).

CarriesN128
CrossesLittle Nemaha River
Location7W Lorton
RouteState Highway 128
Coordinates40.5957, -96.1493
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2025
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable 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

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length250 ft (76.2 m)
Longest span99 ft (30.2 m)
Deck width38 ft (11.5 m)
Roadway width35 ft (10.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic785 (2018)
Projected traffic1,060 by 2038
Trucks10%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was N128 over Little Nemaha River built?

It was built in 1999, making it 26 years old in 2025.

What condition is N128 over Little Nemaha 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 February 2025.

How much traffic does N128 over Little Nemaha River carry?

About 785 vehicles per day (2018 count), of which roughly 10% are trucks.

How long is N128 over Little Nemaha River?

The structure is 250 ft (76.2 m) long with a longest span of 99 ft (30.2 m) and a deck 38 ft wide.

Who owns N128 over Little Nemaha River?

It is owned by the State Highway Agency.