US Bridges

N12 over N. Aowa Creek Trib

Poor

Dixon County, Nebraska · 7NW Ponca · Structure no. S012 22681

Built
1994
31 years old
Condition
Poor
inspected September 2024
Type
Slab
Concrete Continuous
Length
82 ft
3 main spans
Daily traffic
1,450
2018 count
Owner
State
State Highway Agency

About this bridge

N12 over N. Aowa Creek Trib is a concrete continuous slab carrying N12 over N. Aowa Creek Trib in Dixon County, Nebraska. It was built in 1994, so it is 31 years old, younger than the Nebraska average of 47.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1,450 vehicles a day, roughly 9% of them trucks, projected to reach 1,885 by 2038. The structure is 82 ft (25 m) long and 38 ft wide. If it were closed, the detour would be 49.7 mi (80 km).

Location

Open in Google Maps
CarriesN12
CrossesN. Aowa Creek Trib
Location7NW Ponca
RouteState Highway 12
CountyDixon County
StateNebraska
Coordinates42.6224, -96.8191
Functional classRural Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating86 US tons
Inventory rating51.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length82 ft (25 m)
Longest span32 ft (9.8 m)
Deck width38 ft (11.7 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,450 (2018)
Projected traffic1,885 by 2038
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed49.7 mi (80 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 N12 over N. Aowa Creek Trib built?

It was built in 1994, making it 31 years old in 2025.

What condition is N12 over N. Aowa Creek Trib in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2024.

How much traffic does N12 over N. Aowa Creek Trib carry?

About 1,450 vehicles per day (2018 count), of which roughly 9% are trucks.

How long is N12 over N. Aowa Creek Trib?

The structure is 82 ft (25 m) long with a longest span of 32 ft (9.8 m) and a deck 38 ft wide.

Who owns N12 over N. Aowa Creek Trib?

It is owned by the State Highway Agency.