US Bridges

N91 over North Loup River Trib

Good

Garfield County, Nebraska · 1W Burwell · Structure no. S091 05893

Built
1950
75 years old, rebuilt 1994
Condition
Good
inspected March 2023
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
1,385
2018 count
Owner
State
State Highway Agency

About this bridge

N91 over North Loup River Trib is a concrete culvert carrying N91 over North Loup River Trib in Garfield County, Nebraska. It was built in 1950 and reconstructed in 1994, so it is 75 years old, older 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 1,385 vehicles a day, roughly 16% of them trucks, projected to reach 1,801 by 2038. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 18.6 mi (30 km).

CarriesN91
CrossesNorth Loup River Trib
Location1W Burwell
RouteState Highway 91
Coordinates41.7696, -99.1327
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2023
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 adequacy8: Equal to present desirable 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 spans2
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,385 (2018)
Projected traffic1,801 by 2038
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18.6 mi (30 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 N91 over North Loup River Trib built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1994.

What condition is N91 over North Loup River Trib 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 March 2023.

How much traffic does N91 over North Loup River Trib carry?

About 1,385 vehicles per day (2018 count), of which roughly 16% are trucks.

How long is N91 over North Loup River Trib?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m).

Who owns N91 over North Loup River Trib?

It is owned by the State Highway Agency.