US Bridges

US20/N15 over Perrin Creek

Fair

Cedar County, Nebraska · 1N Laurel · Structure no. S020 39279

Built
1934
91 years old, rebuilt 1968
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
51 ft
1 main span
Daily traffic
2,830
2018 count
Owner
State
State Highway Agency

About this bridge

US20/N15 over Perrin Creek is a steel stringer/multi-beam or girder carrying US20/N15 over Perrin Creek in Cedar County, Nebraska. It was built in 1934 and reconstructed in 1968, so it is 91 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 5 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 2,830 vehicles a day, roughly 16% of them trucks, projected to reach 3,679 by 2038. The structure is 51 ft (15.5 m) long and 43 ft wide. If it were closed, the detour would be 31.1 mi (50 km).

Location

Open in Google Maps
CarriesUS20/N15
CrossesPerrin Creek
Location1N Laurel
RouteU.S. Route 20
CountyCedar County
StateNebraska
Coordinates42.4428, -97.0941
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.3 US tons
Inventory rating27.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length51 ft (15.5 m)
Longest span49 ft (14.9 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,830 (2018)
Projected traffic3,679 by 2038
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.1 mi (50 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 Perrin Creek built?

It was built in 1934, making it 91 years old in 2025. It was reconstructed in 1968.

What condition is US20/N15 over Perrin 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 Perrin Creek carry?

About 2,830 vehicles per day (2018 count), of which roughly 16% are trucks.

How long is US20/N15 over Perrin Creek?

The structure is 51 ft (15.5 m) long with a longest span of 49 ft (14.9 m) and a deck 43 ft wide.

Who owns US20/N15 over Perrin Creek?

It is owned by the State Highway Agency.