US Bridges

Irr/County Highway over Big Slough Creek

PoorPosted for load

Thurston County, Nebraska · .5SW of Rosalie · Structure no. C008703405

Built
1965
60 years old
Condition
Poor
inspected October 2023
Type
Girder and Floorbeam System
Steel
Length
55 ft
1 main span
Daily traffic
90
2003 count
Owner
County
County Highway Agency

About this bridge

Irr/County Highway over Big Slough Creek is a steel girder and floorbeam system carrying Irr/County Highway over Big Slough Creek in Thurston County, Nebraska. It was built in 1965, so it is 60 years old, older than the Nebraska average of 47.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 90 vehicles a day, projected to reach 153 by 2033. The structure is 55 ft (16.8 m) long and 24 ft wide. If it were closed, the detour would be 31.1 mi (50 km).

CarriesIrr/County Highway
CrossesBig Slough Creek
Location.5SW of Rosalie
RouteCounty Highway 34
Coordinates42.0465, -96.5209
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; extensive scour has occurred
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating16.5 US tons
Inventory rating9.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length55 ft (16.8 m)
Longest span54 ft (16.5 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic90 (2003)
Projected traffic153 by 2033
Trucks0%
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

OwnerCounty Highway Agency
Maintained byCounty 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 Irr/County Highway over Big Slough Creek built?

It was built in 1965, making it 60 years old in 2025.

What condition is Irr/County Highway over Big Slough Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2023.

How much traffic does Irr/County Highway over Big Slough Creek carry?

About 90 vehicles per day (2003 count).

How long is Irr/County Highway over Big Slough Creek?

The structure is 55 ft (16.8 m) long with a longest span of 54 ft (16.5 m) and a deck 24 ft wide.

Who owns Irr/County Highway over Big Slough Creek?

It is owned by the County Highway Agency.