US Bridges

County Highway over Yankton Slough

Fair

Pierce County, Nebraska · 5S .5E of Mclean · Structure no. C007002035

Built
2001
24 years old
Condition
Fair
inspected September 2023
Type
Slab
Concrete
Length
75 ft
3 main spans
Daily traffic
30
2003 count
Owner
County
County Highway Agency

About this bridge

County Highway over Yankton Slough is a concrete slab carrying County Highway over Yankton Slough in Pierce County, Nebraska. It was built in 2001, so it is 24 years old, younger 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 5 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 30 vehicles a day, projected to reach 51 by 2033. The structure is 75 ft (22.9 m) long and 28 ft wide. If it were closed, the detour would be 18.6 mi (30 km).

Location

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CarriesCounty Highway
CrossesYankton Slough
Location5S .5E of Mclean
RouteCounty Highway 20
CountyPierce County
StateNebraska
Coordinates42.308, -97.453
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80.5 US tons
Inventory rating48.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length75 ft (22.9 m)
Longest span32 ft (9.8 m)
Deck width28 ft (8.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2003)
Projected traffic51 by 2033
Trucks0%
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

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County Highway over Yankton Slough built?

It was built in 2001, making it 24 years old in 2025.

What condition is County Highway over Yankton Slough 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 September 2023.

How much traffic does County Highway over Yankton Slough carry?

About 30 vehicles per day (2003 count).

How long is County Highway over Yankton Slough?

The structure is 75 ft (22.9 m) long with a longest span of 32 ft (9.8 m) and a deck 28 ft wide.

Who owns County Highway over Yankton Slough?

It is owned by the County Highway Agency.