US Bridges

N15 over North Logan Creek

Good

Cedar County, Nebraska · 5N Laurel · Structure no. S015 18571

Built
2001
24 years old
Condition
Good
inspected September 2024
Type
Tee Beam
Prestressed Concrete
Length
87 ft
1 main span
Daily traffic
875
2018 count
Owner
State
State Highway Agency

About this bridge

N15 over North Logan Creek is a prestressed concrete tee beam carrying N15 over North Logan Creek in Cedar County, Nebraska. It was built in 2001, so it is 24 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 875 vehicles a day, roughly 10% of them trucks, projected to reach 1,138 by 2038. The structure is 87 ft (26.5 m) long and 38 ft wide. If it were closed, the detour would be 31.1 mi (50 km).

CarriesN15
CrossesNorth Logan Creek
Location5N Laurel
RouteState Highway 15
Coordinates42.5074, -97.0944
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 rating110.1 US tons
Inventory rating63.9 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length87 ft (26.5 m)
Longest span85 ft (25.9 m)
Deck width38 ft (11.5 m)
Roadway width35 ft (10.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic875 (2018)
Projected traffic1,138 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 N15 over North Logan Creek built?

It was built in 2001, making it 24 years old in 2025.

What condition is N15 over North Logan 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 September 2024.

How much traffic does N15 over North Logan Creek carry?

About 875 vehicles per day (2018 count), of which roughly 10% are trucks.

How long is N15 over North Logan Creek?

The structure is 87 ft (26.5 m) long with a longest span of 85 ft (25.9 m) and a deck 38 ft wide.

Who owns N15 over North Logan Creek?

It is owned by the State Highway Agency.