US Bridges

N21 over Dawson County Canal

Good

Dawson County, Nebraska · 6N Lexington · Structure no. S021 03419

Built
2021
4 years old
Condition
Good
inspected November 2023
Type
Culvert
Concrete
Length
26 ft
3 main spans
Daily traffic
1,015
2018 count
Owner
State
State Highway Agency

About this bridge

N21 over Dawson County Canal is a concrete culvert carrying N21 over Dawson County Canal in Dawson County, Nebraska. It was built in 2021, so it is 4 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 1,015 vehicles a day, roughly 22% of them trucks, projected to reach 1,015 by 2038. The structure is 26 ft (7.8 m) long. If it were closed, the detour would be 31.1 mi (50 km).

Location

Open in Google Maps
CarriesN21
CrossesDawson County Canal
Location6N Lexington
RouteState Highway 21
CountyDawson County
StateNebraska
Coordinates40.8736, -99.7489
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 protection7 GoodSome minor problems.
Culvert8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.8 US tons
Inventory rating56.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHL 93
Structure length26 ft (7.8 m)
Longest span7 ft (2.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,015 (2018)
Projected traffic1,015 by 2038
Trucks22%
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 N21 over Dawson County Canal built?

It was built in 2021, making it 4 years old in 2025.

What condition is N21 over Dawson County Canal 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 November 2023.

How much traffic does N21 over Dawson County Canal carry?

About 1,015 vehicles per day (2018 count), of which roughly 22% are trucks.

How long is N21 over Dawson County Canal?

The structure is 26 ft (7.8 m) long with a longest span of 7 ft (2.1 m).

Who owns N21 over Dawson County Canal?

It is owned by the State Highway Agency.