US Bridges

County Highway over N Fk Big Nemaha River

Good

Johnson County, Nebraska · JCT US136/N50 3.8W · Structure no. C004912015

Built
1989
36 years old
Condition
Good
inspected September 2021
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
249 ft
3 main spans
Daily traffic
50
2003 count
Owner
County
County Highway Agency

About this bridge

County Highway over N Fk Big Nemaha River is a steel continuous stringer/multi-beam or girder carrying County Highway over N Fk Big Nemaha River in Johnson County, Nebraska. It was built in 1989, so it is 36 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 50 vehicles a day, projected to reach 85 by 2033. The structure is 249 ft (75.9 m) long and 30 ft wide. If it were closed, the detour would be 87 mi (140 km).

Location

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CarriesCounty Highway
CrossesN Fk Big Nemaha River
LocationJCT US136/N50 3.8W
RouteCounty Highway 120
CountyJohnson County
StateNebraska
Coordinates40.3917, -96.2467
Functional classRural Local

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionSeptember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.8 US tons
Inventory rating43 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length249 ft (75.9 m)
Longest span95 ft (29 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2003)
Projected traffic85 by 2033
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed87 mi (140 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 County Highway over N Fk Big Nemaha River built?

It was built in 1989, making it 36 years old in 2025.

What condition is County Highway over N Fk Big 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 September 2021.

How much traffic does County Highway over N Fk Big Nemaha River carry?

About 50 vehicles per day (2003 count).

How long is County Highway over N Fk Big Nemaha River?

The structure is 249 ft (75.9 m) long with a longest span of 95 ft (29 m) and a deck 30 ft wide.

Who owns County Highway over N Fk Big Nemaha River?

It is owned by the County Highway Agency.