US Bridges

Irr/County Highway over South Blackbird Creek

Good

Thurston County, Nebraska · 4.5S of Macy · Structure no. C008703425

Built
2014
11 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
95 ft
1 main span
Daily traffic
110
1997 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 2014, so it is 11 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 110 vehicles a day, roughly 5% of them trucks, projected to reach 187 by 2033. The structure is 95 ft (29 m) long and 24 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
Location4.5S of Macy
RouteCounty Highway 34
CountyThurston County
StateNebraska
Coordinates42.0461, -96.3556
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating60.6 US tons
Inventory rating47.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length95 ft (29 m)
Longest span95 ft (29 m)
Deck width24 ft (7.3 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic110 (1997)
Projected traffic187 by 2033
Trucks5%
Lanes on structure2
Traffic directionOne-lane bridge for two-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 2014, making it 11 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 110 vehicles per day (1997 count), of which roughly 5% are trucks.

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

The structure is 95 ft (29 m) long with a longest span of 95 ft (29 m) and a deck 24 ft wide.

Who owns Irr/County Highway over South Blackbird Creek?

It is owned by the County Highway Agency.