US Bridges

N71 over Rocky Hollow Draw

Good

Banner County, Nebraska · 12N Kimball · Structure no. S071 02827

Built
1991
34 years old, rebuilt 1997
Condition
Good
inspected September 2023
Type
Culvert
Concrete
Length
51 ft
4 main spans
Daily traffic
2,400
2018 count
Owner
State
State Highway Agency

About this bridge

N71 over Rocky Hollow Draw is a concrete culvert carrying N71 over Rocky Hollow Draw in Banner County, Nebraska. It was built in 1991 and reconstructed in 1997, so it is 34 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 2,400 vehicles a day, roughly 14% of them trucks, projected to reach 3,360 by 2038. The structure is 51 ft (15.5 m) long. If it were closed, the detour would be 62.1 mi (100 km).

CarriesN71
CrossesRocky Hollow Draw
Location12N Kimball
RouteState Highway 71
Coordinates41.4051, -103.6643
Functional classRural Principal Arterial - Other

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 inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 spans4
Design loadHS 20
Structure length51 ft (15.5 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,400 (2018)
Projected traffic3,360 by 2038
Trucks14%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed62.1 mi (100 km)
TollOn a free road
National Highway SystemYes

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 N71 over Rocky Hollow Draw built?

It was built in 1991, making it 34 years old in 2025. It was reconstructed in 1997.

What condition is N71 over Rocky Hollow Draw 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 N71 over Rocky Hollow Draw carry?

About 2,400 vehicles per day (2018 count), of which roughly 14% are trucks.

How long is N71 over Rocky Hollow Draw?

The structure is 51 ft (15.5 m) long with a longest span of 12 ft (3.7 m).

Who owns N71 over Rocky Hollow Draw?

It is owned by the State Highway Agency.