US Bridges

N78 over Minnie Soap Creek

Good

Webster County, Nebraska · 1N Guide Rock · Structure no. S078 00566

Built
1955
70 years old, rebuilt 2014
Condition
Good
inspected July 2023
Type
Slab
Concrete Continuous
Length
73 ft
3 main spans
Daily traffic
650
2018 count
Owner
State
State Highway Agency

About this bridge

N78 over Minnie Soap Creek is a concrete continuous slab carrying N78 over Minnie Soap Creek in Webster County, Nebraska. It was built in 1955 and reconstructed in 2014, so it is 70 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 650 vehicles a day, roughly 10% of them trucks, projected to reach 748 by 2038. The structure is 73 ft (22.3 m) long and 28 ft wide. If it were closed, the detour would be 31.1 mi (50 km).

Location

Open in Google Maps
CarriesN78
CrossesMinnie Soap Creek
Location1N Guide Rock
RouteState Highway 78
CountyWebster County
StateNebraska
Coordinates40.0845, -98.3303
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 protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: 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 rating43 US tons
Inventory rating25.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length73 ft (22.3 m)
Longest span30 ft (9.1 m)
Deck width28 ft (8.6 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic650 (2018)
Projected traffic748 by 2038
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.1 mi (50 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 N78 over Minnie Soap Creek built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 2014.

What condition is N78 over Minnie Soap 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 July 2023.

How much traffic does N78 over Minnie Soap Creek carry?

About 650 vehicles per day (2018 count), of which roughly 10% are trucks.

How long is N78 over Minnie Soap Creek?

The structure is 73 ft (22.3 m) long with a longest span of 30 ft (9.1 m) and a deck 28 ft wide.

Who owns N78 over Minnie Soap Creek?

It is owned by the State Highway Agency.