US Bridges

US 30 over Boyer River

Good

Harrison County, Iowa · At S Jct. SR F-32 · Structure no. 000000000027491

Built
2016
9 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
283 ft
3 main spans
Daily traffic
4,430
2022 count
Owner
State
State Highway Agency

About this bridge

US 30 over Boyer River is a steel continuous stringer/multi-beam or girder carrying US 30 over Boyer River in Harrison County, Iowa. It was built in 2016, so it is 9 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 4,430 vehicles a day, roughly 17% of them trucks, projected to reach 4,430 by 2044. The structure is 283 ft (86.2 m) long and 63 ft wide. If it were closed, the detour would be 28 mi (45 km).

CarriesUS 30
CrossesBoyer River
LocationAt S Jct. SR F-32
RouteU.S. Route 30
StateIowa
Coordinates41.73179, -95.70166
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable 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

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length283 ft (86.2 m)
Longest span137 ft (41.8 m)
Deck width63 ft (19.3 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,430 (2022)
Projected traffic4,430 by 2044
Trucks17%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed28 mi (45 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 US 30 over Boyer River built?

It was built in 2016, making it 9 years old in 2025.

What condition is US 30 over Boyer 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 November 2024.

How much traffic does US 30 over Boyer River carry?

About 4,430 vehicles per day (2022 count), of which roughly 17% are trucks.

How long is US 30 over Boyer River?

The structure is 283 ft (86.2 m) long with a longest span of 137 ft (41.8 m) and a deck 63 ft wide.

Who owns US 30 over Boyer River?

It is owned by the State Highway Agency.