US Bridges

N11 over Dizzy Creek

Fair

Boyd County, Nebraska · 2NE Butte · Structure no. S011 18424

Built
1945
80 years old, rebuilt 1984
Condition
Fair
inspected March 2023
Type
Culvert
Concrete
Length
44 ft
3 main spans
Daily traffic
650
2018 count
Owner
State
State Highway Agency

About this bridge

N11 over Dizzy Creek is a concrete culvert carrying N11 over Dizzy Creek in Boyd County, Nebraska. It was built in 1945 and reconstructed in 1984, so it is 80 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 650 vehicles a day, roughly 11% of them trucks, projected to reach 780 by 2038. The structure is 44 ft (13.4 m) long. If it were closed, the detour would be 18.6 mi (30 km).

Location

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CarriesN11
CrossesDizzy Creek
Location2NE Butte
RouteState Highway 11
CountyBoyd County
StateNebraska
Coordinates42.9397, -98.8408
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 spans3
Design loadHS 20
Structure length44 ft (13.4 m)
Longest span20 ft (6.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic650 (2018)
Projected traffic780 by 2038
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18.6 mi (30 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 N11 over Dizzy Creek built?

It was built in 1945, making it 80 years old in 2025. It was reconstructed in 1984.

What condition is N11 over Dizzy Creek 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 March 2023.

How much traffic does N11 over Dizzy Creek carry?

About 650 vehicles per day (2018 count), of which roughly 11% are trucks.

How long is N11 over Dizzy Creek?

The structure is 44 ft (13.4 m) long with a longest span of 20 ft (6.1 m).

Who owns N11 over Dizzy Creek?

It is owned by the State Highway Agency.