US Bridges

N14 over Warm Slough

Good

Merrick County, Nebraska · In Central City · Structure no. S014 08192

Built
1976
49 years old
Condition
Good
inspected December 2024
Type
Culvert
Concrete
Length
39 ft
3 main spans
Daily traffic
2,750
2018 count
Owner
State
State Highway Agency

About this bridge

N14 over Warm Slough is a concrete culvert carrying N14 over Warm Slough in Merrick County, Nebraska. It was built in 1976, so it is 49 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 2,750 vehicles a day, roughly 12% of them trucks, projected to reach 3,713 by 2038. The structure is 39 ft (11.9 m) long. If it were closed, the detour would be 12.4 mi (20 km).

Location

Open in Google Maps
CarriesN14
CrossesWarm Slough
LocationIn Central City
RouteState Highway 14
CountyMerrick County
StateNebraska
Coordinates41.1221, -98.0017
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 protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.4 US tons
Inventory rating36.4 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length39 ft (11.9 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,750 (2018)
Projected traffic3,713 by 2038
Trucks12%
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 N14 over Warm Slough built?

It was built in 1976, making it 49 years old in 2025.

What condition is N14 over Warm Slough 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 December 2024.

How much traffic does N14 over Warm Slough carry?

About 2,750 vehicles per day (2018 count), of which roughly 12% are trucks.

How long is N14 over Warm Slough?

The structure is 39 ft (11.9 m) long with a longest span of 12 ft (3.7 m).

Who owns N14 over Warm Slough?

It is owned by the State Highway Agency.