US Bridges

485th Ave over Mira Creek

Good

Valley County, Nebraska · .5N of North Loup · Structure no. C008814710

Built
2020
5 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
102 ft
3 main spans
Daily traffic
105
1998 count
Owner
County
County Highway Agency

About this bridge

485th Ave over Mira Creek is a concrete stringer/multi-beam or girder carrying 485th Ave over Mira Creek in Valley County, Nebraska. It was built in 2020, so it is 5 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 105 vehicles a day, projected to reach 178 by 2033. The structure is 102 ft (31.1 m) long and 34 ft wide. If it were closed, the detour would be 12.4 mi (20 km).

Carries485th Ave
CrossesMira Creek
Location.5N of North Loup
RouteCounty Highway 7490
Coordinates41.5042, -98.7702
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating41.9 US tons

Structure

MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHL 93
Structure length102 ft (31.1 m)
Longest span34 ft (10.4 m)
Deck width34 ft (10.4 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic105 (1998)
Projected traffic178 by 2033
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed12.4 mi (20 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 485th Ave over Mira Creek built?

It was built in 2020, making it 5 years old in 2025.

What condition is 485th Ave over Mira 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 June 2024.

How much traffic does 485th Ave over Mira Creek carry?

About 105 vehicles per day (1998 count).

How long is 485th Ave over Mira Creek?

The structure is 102 ft (31.1 m) long with a longest span of 34 ft (10.4 m) and a deck 34 ft wide.

Who owns 485th Ave over Mira Creek?

It is owned by the County Highway Agency.