US Bridges

IRR/US75 over North Blackbird Creek

Fair

Thurston County, Nebraska · 13N Decatur · Structure no. S075 16302

Built
1933
92 years old, rebuilt 1950
Condition
Fair
inspected September 2024
Type
Culvert
Concrete
Length
38 ft
3 main spans
Daily traffic
1,435
2018 count
Owner
State
State Highway Agency

About this bridge

IRR/US75 over North Blackbird Creek is a concrete culvert carrying IRR/US75 over North Blackbird Creek in Thurston County, Nebraska. It was built in 1933 and reconstructed in 1950, so it is 92 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.

It carries about 1,435 vehicles a day, roughly 12% of them trucks, projected to reach 2,224 by 2038. The structure is 38 ft (11.6 m) long. If it were closed, the detour would be 37.3 mi (60 km).

Location

Open in Google Maps
CarriesIRR/US75
CrossesNorth Blackbird Creek
Location13N Decatur
RouteU.S. Route 75
CountyThurston County
StateNebraska
Coordinates42.1701, -96.3975
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: 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 rating36.4 US tons
Inventory rating24.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadH 20
Structure length38 ft (11.6 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,435 (2018)
Projected traffic2,224 by 2038
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed37.3 mi (60 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 IRR/US75 over North Blackbird Creek built?

It was built in 1933, making it 92 years old in 2025. It was reconstructed in 1950.

What condition is IRR/US75 over North Blackbird Creek 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 2024.

How much traffic does IRR/US75 over North Blackbird Creek carry?

About 1,435 vehicles per day (2018 count), of which roughly 12% are trucks.

How long is IRR/US75 over North Blackbird Creek?

The structure is 38 ft (11.6 m) long with a longest span of 12 ft (3.7 m).

Who owns IRR/US75 over North Blackbird Creek?

It is owned by the State Highway Agency.