US Bridges

Irr/County Highway over South Blackbird Creek

Good

Thurston County, Nebraska · 1.5S 7.5E of Rosalie · Structure no. C008703615

Built
2011
14 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
120 ft
1 main span
Daily traffic
30
2003 count
Owner
County
County Highway Agency

About this bridge

Irr/County Highway over South Blackbird Creek is a steel stringer/multi-beam or girder carrying Irr/County Highway over South Blackbird Creek in Thurston County, Nebraska. It was built in 2011, so it is 14 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 30 vehicles a day, projected to reach 51 by 2033. The structure is 120 ft (36.6 m) long and 22 ft wide. If it were closed, the detour would be 18.6 mi (30 km).

Location

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CarriesIrr/County Highway
CrossesSouth Blackbird Creek
Location1.5S 7.5E of Rosalie
RouteCounty Highway 36
CountyThurston County
StateNebraska
Coordinates42.0316, -96.3681
Functional classRural Local

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
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 rating46.3 US tons
Inventory rating36.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length120 ft (36.6 m)
Longest span115 ft (35.1 m)
Deck width22 ft (6.8 m)
Roadway width20 ft (6.1 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 Irr/County Highway over South Blackbird Creek built?

It was built in 2011, making it 14 years old in 2025.

What condition is Irr/County Highway over South Blackbird Creek 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 2023.

How much traffic does Irr/County Highway over South Blackbird Creek carry?

About 30 vehicles per day (2003 count).

How long is Irr/County Highway over South Blackbird Creek?

The structure is 120 ft (36.6 m) long with a longest span of 115 ft (35.1 m) and a deck 22 ft wide.

Who owns Irr/County Highway over South Blackbird Creek?

It is owned by the County Highway Agency.