US Bridges

School House RD over Niobrara River

Good

Sioux County, Nebraska · 18S 14E of Harrison · Structure no. C008304705

Built
2006
19 years old
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
31 ft
1 main span
Daily traffic
35
1998 count
Owner
County
County Highway Agency

About this bridge

School House RD over Niobrara River is a steel stringer/multi-beam or girder carrying School House RD over Niobrara River in Sioux County, Nebraska. It was built in 2006, so it is 19 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 35 vehicles a day, projected to reach 59 by 2033. The structure is 31 ft (9.4 m) long and 28 ft wide. If it were closed, the detour would be 341.8 mi (550 km).

Location

Open in Google Maps
CarriesSchool House RD
CrossesNiobrara River
Location18S 14E of Harrison
RouteCounty Highway 7141
CountySioux County
StateNebraska
Coordinates42.4329, -103.6015
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation9: Superior to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating67.2 US tons
Inventory rating39.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length31 ft (9.4 m)
Longest span30 ft (9.1 m)
Deck width28 ft (8.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (1998)
Projected traffic59 by 2033
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed341.8 mi (550 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 School House RD over Niobrara River built?

It was built in 2006, making it 19 years old in 2025.

What condition is School House 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 November 2023.

How much traffic does School House RD over Niobrara River carry?

About 35 vehicles per day (1998 count).

How long is School House RD over Niobrara River?

The structure is 31 ft (9.4 m) long with a longest span of 30 ft (9.1 m) and a deck 28 ft wide.

Who owns School House RD over Niobrara River?

It is owned by the County Highway Agency.