US Bridges

US20/N15 over Logan Creek

Fair

Cedar County, Nebraska · 1N Laurel · Structure no. S020 39242

Built
1968
57 years old, rebuilt 1991
Condition
Fair
inspected September 2024
Type
Slab
Concrete Continuous
Length
132 ft
3 main spans
Daily traffic
4,325
2018 count
Owner
State
State Highway Agency

About this bridge

US20/N15 over Logan Creek is a concrete continuous slab carrying US20/N15 over Logan Creek in Cedar County, Nebraska. It was built in 1968 and reconstructed in 1991, so it is 57 years old, older than the Nebraska average of 47.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 4,325 vehicles a day, roughly 10% of them trucks, projected to reach 5,623 by 2038. The structure is 132 ft (40.2 m) long and 42 ft wide. If it were closed, the detour would be 18.6 mi (30 km).

Location

Open in Google Maps
CarriesUS20/N15
CrossesLogan Creek
Location1N Laurel
RouteU.S. Route 20
CountyCedar County
StateNebraska
Coordinates42.4376, -97.0957
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81.6 US tons
Inventory rating41.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length132 ft (40.2 m)
Longest span50 ft (15.2 m)
Deck width42 ft (12.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,325 (2018)
Projected traffic5,623 by 2038
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18.6 mi (30 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 US20/N15 over Logan Creek built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 1991.

What condition is US20/N15 over Logan Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2024.

How much traffic does US20/N15 over Logan Creek carry?

About 4,325 vehicles per day (2018 count), of which roughly 10% are trucks.

How long is US20/N15 over Logan Creek?

The structure is 132 ft (40.2 m) long with a longest span of 50 ft (15.2 m) and a deck 42 ft wide.

Who owns US20/N15 over Logan Creek?

It is owned by the State Highway Agency.