US Bridges

US20 over Plum Creek

Good

Brown County, Nebraska · 3W Johnstown · Structure no. S020 22961

Built
1989
36 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
193 ft
3 main spans
Daily traffic
1,335
2018 count
Owner
State
State Highway Agency

About this bridge

US20 over Plum Creek is a steel continuous stringer/multi-beam or girder carrying US20 over Plum Creek in Brown County, Nebraska. It was built in 1989, so it is 36 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,335 vehicles a day, roughly 16% of them trucks, projected to reach 1,736 by 2038. The structure is 193 ft (58.8 m) long and 47 ft wide. If it were closed, the detour would be 80.8 mi (130 km).

CarriesUS20
CrossesPlum Creek
Location3W Johnstown
RouteU.S. Route 20
Coordinates42.5693, -100.1039
Functional classRural Principal Arterial - Other

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.1 US tons
Inventory rating51.8 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length193 ft (58.8 m)
Longest span76 ft (23.2 m)
Deck width47 ft (14.2 m)
Roadway width44 ft (13.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,335 (2018)
Projected traffic1,736 by 2038
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed80.8 mi (130 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 over Plum Creek built?

It was built in 1989, making it 36 years old in 2025.

What condition is US20 over Plum 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 March 2023.

How much traffic does US20 over Plum Creek carry?

About 1,335 vehicles per day (2018 count), of which roughly 16% are trucks.

How long is US20 over Plum Creek?

The structure is 193 ft (58.8 m) long with a longest span of 76 ft (23.2 m) and a deck 47 ft wide.

Who owns US20 over Plum Creek?

It is owned by the State Highway Agency.