US Bridges

N18 over Medicine Creek

Good

Frontier County, Nebraska · 0S Curtis · Structure no. S018 00036

Built
2024
1 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
241 ft
4 main spans
Daily traffic
490
2018 count
Owner
State
State Highway Agency

About this bridge

N18 over Medicine Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying N18 over Medicine Creek in Frontier County, Nebraska. It was built in 2024, so it is 1 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 490 vehicles a day, roughly 9% of them trucks, projected to reach 637 by 2038. The structure is 241 ft (73.5 m) long and 41 ft wide. If it were closed, the detour would be 130.5 mi (210 km).

Location

Open in Google Maps
CarriesN18
CrossesMedicine Creek
Location0S Curtis
RouteState Highway 18
CountyFrontier County
StateNebraska
Coordinates40.6249, -100.5158
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
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.8 US tons
Inventory rating24.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length241 ft (73.5 m)
Longest span70 ft (21.3 m)
Deck width41 ft (12.4 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic490 (2018)
Projected traffic637 by 2038
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed130.5 mi (210 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 Medicine Creek built?

It was built in 2024, making it 1 years old in 2025.

What condition is N18 over Medicine 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 2024.

How much traffic does N18 over Medicine Creek carry?

About 490 vehicles per day (2018 count), of which roughly 9% are trucks.

How long is N18 over Medicine Creek?

The structure is 241 ft (73.5 m) long with a longest span of 70 ft (21.3 m) and a deck 41 ft wide.

Who owns N18 over Medicine Creek?

It is owned by the State Highway Agency.