US Bridges

US81 over Yankton Slough

Good

Pierce County, Nebraska · JCT US81/US20 2S · Structure no. S081 17820

Built
2022
3 years old
Condition
Good
inspected October 2024
Type
Slab
Concrete Continuous
Length
90 ft
3 main spans
Daily traffic
4,245
2018 count
Owner
State
State Highway Agency

About this bridge

US81 over Yankton Slough is a concrete continuous slab carrying US81 over Yankton Slough in Pierce County, Nebraska. It was built in 2022, so it is 3 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 4,245 vehicles a day, roughly 18% of them trucks, projected to reach 6,368 by 2038. The structure is 90 ft (27.4 m) long and 47 ft wide. If it were closed, the detour would be 130.5 mi (210 km).

Location

Open in Google Maps
CarriesUS81
CrossesYankton Slough
LocationJCT US81/US20 2S
RouteU.S. Route 81
CountyPierce County
StateNebraska
Coordinates42.3406, -97.4262
Functional classRural Principal Arterial - Other

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.9 US tons
Inventory rating48.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length90 ft (27.4 m)
Longest span36 ft (11 m)
Deck width47 ft (14.2 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,245 (2018)
Projected traffic6,368 by 2038
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed130.5 mi (210 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US81 over Yankton Slough built?

It was built in 2022, making it 3 years old in 2025.

What condition is US81 over Yankton 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 October 2024.

How much traffic does US81 over Yankton Slough carry?

About 4,245 vehicles per day (2018 count), of which roughly 18% are trucks.

How long is US81 over Yankton Slough?

The structure is 90 ft (27.4 m) long with a longest span of 36 ft (11 m) and a deck 47 ft wide.

Who owns US81 over Yankton Slough?

It is owned by the State Highway Agency.