US Bridges

N12 over Stream

Good

Knox County, Nebraska · Ecl Crofton · Structure no. S012 18993

Built
1951
74 years old, rebuilt 1981
Condition
Good
inspected October 2024
Type
Culvert
Concrete
Length
24 ft
2 main spans
Daily traffic
1,545
2018 count
Owner
State
State Highway Agency

About this bridge

N12 over Stream is a concrete culvert carrying N12 over Stream in Knox County, Nebraska. It was built in 1951 and reconstructed in 1981, so it is 74 years old, older 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 1,545 vehicles a day, roughly 9% of them trucks, projected to reach 2,163 by 2038. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 12.4 mi (20 km).

CarriesN12
CrossesStream
LocationEcl Crofton
RouteState Highway 12
Coordinates42.7288, -97.4888
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.4 US tons
Inventory rating24.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,545 (2018)
Projected traffic2,163 by 2038
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed12.4 mi (20 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 Stream built?

It was built in 1951, making it 74 years old in 2025. It was reconstructed in 1981.

What condition is N12 over Stream 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 October 2024.

How much traffic does N12 over Stream carry?

About 1,545 vehicles per day (2018 count), of which roughly 9% are trucks.

How long is N12 over Stream?

The structure is 24 ft (7.3 m) long with a longest span of 10 ft (3 m).

Who owns N12 over Stream?

It is owned by the State Highway Agency.