US Bridges

US 34 over Missouri River

Good

Mills County, Iowa · N. of Plattsmouth NE · Structure no. 000000000700110

Built
2014
11 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
3,282 ft
3 main spans
Daily traffic
7,100
2022 count
Owner
State
State Highway Agency

About this bridge

US 34 over Missouri River is a steel continuous stringer/multi-beam or girder carrying US 34 over Missouri River in Mills County, Iowa. It was built in 2014, so it is 11 years old, younger than the Iowa average of 45.5 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 7,100 vehicles a day, roughly 12% of them trucks, projected to reach 7,100 by 2044. The structure is 3,282 ft (1,000.4 m) long and 89 ft wide.

Location

Open in Google Maps
CarriesUS 34
CrossesMissouri River
LocationN. of Plattsmouth NE
RouteU.S. Route 34
CountyMills County
StateIowa
Coordinates41.06833, -95.87966
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+15 approach)
Design loadHL 93
Structure length3,282 ft (1,000.4 m)
Longest span515 ft (157 m)
Deck width89 ft (27.2 m)
Roadway width86 ft (26.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,100 (2022)
Projected traffic7,100 by 2044
Trucks12%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was US 34 over Missouri River built?

It was built in 2014, making it 11 years old in 2025.

What condition is US 34 over Missouri River 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 October 2024.

How much traffic does US 34 over Missouri River carry?

About 7,100 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is US 34 over Missouri River?

The structure is 3,282 ft (1,000.4 m) long with a longest span of 515 ft (157 m) and a deck 89 ft wide.

Who owns US 34 over Missouri River?

It is owned by the State Highway Agency.