US Bridges

N18 over Elk Creek

Good

Gosper County, Nebraska · 6E Gosper/Frontier Cl · Structure no. S018 03878

Built
1982
43 years old
Condition
Good
inspected April 2023
Type
Tee Beam
Prestressed Concrete
Length
46 ft
1 main span
Daily traffic
105
2018 count
Owner
State
State Highway Agency

About this bridge

N18 over Elk Creek is a prestressed concrete tee beam carrying N18 over Elk Creek in Gosper County, Nebraska. It was built in 1982, so it is 43 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 105 vehicles a day, roughly 19% of them trucks, projected to reach 137 by 2038. The structure is 46 ft (14 m) long and 31 ft wide. If it were closed, the detour would be 37.3 mi (60 km).

CarriesN18
CrossesElk Creek
Location6E Gosper/Frontier Cl
RouteState Highway 18
Coordinates40.4961, -99.8969
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.4 US tons
Inventory rating27.6 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length46 ft (14 m)
Longest span45 ft (13.7 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic105 (2018)
Projected traffic137 by 2038
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed37.3 mi (60 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 N18 over Elk Creek built?

It was built in 1982, making it 43 years old in 2025.

What condition is N18 over Elk 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 April 2023.

How much traffic does N18 over Elk Creek carry?

About 105 vehicles per day (2018 count), of which roughly 19% are trucks.

How long is N18 over Elk Creek?

The structure is 46 ft (14 m) long with a longest span of 45 ft (13.7 m) and a deck 31 ft wide.

Who owns N18 over Elk Creek?

It is owned by the State Highway Agency.