US Bridges

503rd RD over Niobrara River

Good

Holt County, Nebraska · 11E US281 Boyd Cl · Structure no. C004558315

Built
1986
39 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
655 ft
5 main spans
Daily traffic
165
2011 count
Owner
County
County Highway Agency

About this bridge

503rd RD over Niobrara River is a steel stringer/multi-beam or girder carrying 503rd RD over Niobrara River in Holt County, Nebraska. It was built in 1986, so it is 39 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 165 vehicles a day, projected to reach 165 by 2033. The structure is 655 ft (199.6 m) long and 30 ft wide. If it were closed, the detour would be 329.3 mi (530 km).

Carries503rd RD
CrossesNiobrara River
Location11E US281 Boyd Cl
RouteCounty Highway 2335
Coordinates42.771, -98.4422
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.6 US tons
Inventory rating29.8 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length655 ft (199.6 m)
Longest span142 ft (43.3 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic165 (2011)
Projected traffic165 by 2033
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed329.3 mi (530 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 503rd RD over Niobrara River built?

It was built in 1986, making it 39 years old in 2025.

What condition is 503rd RD 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 August 2023.

How much traffic does 503rd RD over Niobrara River carry?

About 165 vehicles per day (2011 count).

How long is 503rd RD over Niobrara River?

The structure is 655 ft (199.6 m) long with a longest span of 142 ft (43.3 m) and a deck 30 ft wide.

Who owns 503rd RD over Niobrara River?

It is owned by the County Highway Agency.