US Bridges

County Highway over Yankton Slough

FairPosted for load

Pierce County, Nebraska · 3N 1.5E of Pierce · Structure no. C007012815

Built
1935
90 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
40 ft
1 main span
Daily traffic
35
2003 count
Owner
County
County Highway Agency

About this bridge

County Highway over Yankton Slough is a steel stringer/multi-beam or girder carrying County Highway over Yankton Slough in Pierce County, Nebraska. It was built in 1935, so it is 90 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 35 vehicles a day, projected to reach 59 by 2033. The structure is 40 ft (12.2 m) long and 20 ft wide. If it were closed, the detour would be 18.6 mi (30 km).

Location

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CarriesCounty Highway
CrossesYankton Slough
Location3N 1.5E of Pierce
RouteCounty Highway 128
CountyPierce County
StateNebraska
Coordinates42.25, -97.4967
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.7 US tons
Inventory rating24.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckOther
Main spans1
Design loadUnknown
Structure length40 ft (12.2 m)
Longest span39 ft (11.9 m)
Deck width20 ft (6.1 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2003)
Projected traffic59 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County Highway over Yankton Slough built?

It was built in 1935, making it 90 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 35 vehicles per day (2003 count).

How long is County Highway over Yankton Slough?

The structure is 40 ft (12.2 m) long with a longest span of 39 ft (11.9 m) and a deck 20 ft wide.

Who owns County Highway over Yankton Slough?

It is owned by the County Highway Agency.