US Bridges

US20 over Trunk Butte Creek

Good

Dawes County, Nebraska · 8W Chadron · Structure no. S020 05050

Built
1961
64 years old, rebuilt 1997
Condition
Good
inspected May 2024
Type
Slab
Concrete Continuous
Length
113 ft
3 main spans
Daily traffic
1,875
2018 count
Owner
State
State Highway Agency

About this bridge

US20 over Trunk Butte Creek is a concrete continuous slab carrying US20 over Trunk Butte Creek in Dawes County, Nebraska. It was built in 1961 and reconstructed in 1997, so it is 64 years old, older 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 1,875 vehicles a day, roughly 11% of them trucks, projected to reach 2,719 by 2038. The structure is 113 ft (34.4 m) long and 46 ft wide. If it were closed, the detour would be 31.1 mi (50 km).

CarriesUS20
CrossesTrunk Butte Creek
Location8W Chadron
RouteU.S. Route 20
Coordinates42.7941, -103.1645
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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.9 US tons
Inventory rating38.6 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length113 ft (34.4 m)
Longest span46 ft (14 m)
Deck width46 ft (13.9 m)
Roadway width43 ft (13.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,875 (2018)
Projected traffic2,719 by 2038
Trucks11%
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 over Trunk Butte Creek built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1997.

What condition is US20 over Trunk Butte 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 May 2024.

How much traffic does US20 over Trunk Butte Creek carry?

About 1,875 vehicles per day (2018 count), of which roughly 11% are trucks.

How long is US20 over Trunk Butte Creek?

The structure is 113 ft (34.4 m) long with a longest span of 46 ft (14 m) and a deck 46 ft wide.

Who owns US20 over Trunk Butte Creek?

It is owned by the State Highway Agency.