US Bridges

N31 over SW Branch Big Papio Crk

Fair

Washington County, Nebraska · 12N Elkhorn · Structure no. S031 03634

Built
1964
61 years old, rebuilt 1981
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
83 ft
1 main span
Daily traffic
2,885
2018 count
Owner
State
State Highway Agency

About this bridge

N31 over SW Branch Big Papio Crk is a steel stringer/multi-beam or girder carrying N31 over SW Branch Big Papio Crk in Washington County, Nebraska. It was built in 1964 and reconstructed in 1981, so it is 61 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 2,885 vehicles a day, roughly 7% of them trucks, projected to reach 4,039 by 2038. The structure is 83 ft (25.3 m) long and 46 ft wide. If it were closed, the detour would be 31.1 mi (50 km).

CarriesN31
CrossesSW Branch Big Papio Crk
Location12N Elkhorn
RouteState Highway 31
Coordinates41.4519, -96.2242
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
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 rating48.5 US tons
Inventory rating28.7 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length83 ft (25.3 m)
Longest span80 ft (24.4 m)
Deck width46 ft (14.1 m)
Roadway width41 ft (12.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,885 (2018)
Projected traffic4,039 by 2038
Trucks7%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was N31 over SW Branch Big Papio Crk built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1981.

What condition is N31 over SW Branch Big Papio Crk 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 February 2024.

How much traffic does N31 over SW Branch Big Papio Crk carry?

About 2,885 vehicles per day (2018 count), of which roughly 7% are trucks.

How long is N31 over SW Branch Big Papio Crk?

The structure is 83 ft (25.3 m) long with a longest span of 80 ft (24.4 m) and a deck 46 ft wide.

Who owns N31 over SW Branch Big Papio Crk?

It is owned by the State Highway Agency.