US Bridges

470th Ave over Niobrara River

Good

Holt County, Nebraska · 12W N11 Boyd Cl · Structure no. C004521725

Built
2022
3 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
957 ft
7 main spans
Daily traffic
60
2011 count
Owner
County
County Highway Agency

About this bridge

470th Ave over Niobrara River is a prestressed concrete stringer/multi-beam or girder carrying 470th Ave over Niobrara River in Holt County, Nebraska. It was built in 2022, so it is 3 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 60 vehicles a day, projected to reach 85 by 2033. The structure is 957 ft (291.7 m) long and 31 ft wide. If it were closed, the detour would be 397.7 mi (640 km).

Location

Open in Google Maps
Carries470th Ave
CrossesNiobrara River
Location12W N11 Boyd Cl
RouteCounty Highway 2115
CountyHolt County
StateNebraska
Coordinates42.8558, -99.0984
Functional classRural Major Collector

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.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.8 US tons
Inventory rating48.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans7
Design loadHL 93
Structure length957 ft (291.7 m)
Longest span145 ft (44.2 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60 (2011)
Projected traffic85 by 2033
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed397.7 mi (640 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 470th Ave over Niobrara River built?

It was built in 2022, making it 3 years old in 2025.

What condition is 470th Ave over Niobrara River 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 September 2023.

How much traffic does 470th Ave over Niobrara River carry?

About 60 vehicles per day (2011 count).

How long is 470th Ave over Niobrara River?

The structure is 957 ft (291.7 m) long with a longest span of 145 ft (44.2 m) and a deck 31 ft wide.

Who owns 470th Ave over Niobrara River?

It is owned by the County Highway Agency.