US Bridges

US 30 over East Boyer River

Good

Carroll County, Iowa · 0.2 Mi. E of Sec. Rd. M64 · Structure no. 000000000017031

Built
1997
28 years old
Condition
Good
inspected February 2023
Type
Slab
Concrete Continuous
Length
113 ft
3 main spans
Daily traffic
3,670
2022 count
Owner
State
State Highway Agency

About this bridge

US 30 over East Boyer River is a concrete continuous slab carrying US 30 over East Boyer River in Carroll County, Iowa. It was built in 1997, so it is 28 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 3,670 vehicles a day, roughly 20% of them trucks, projected to reach 3,670 by 2042. The structure is 113 ft (34.4 m) long and 47 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesUS 30
CrossesEast Boyer River
Location0.2 Mi. E of Sec. Rd. M64
RouteU.S. Route 30
StateIowa
Coordinates42.07254, -95.08775
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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating95.6 US tons
Inventory rating57.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length113 ft (34.4 m)
Longest span43 ft (13.1 m)
Deck width47 ft (14.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,670 (2022)
Projected traffic3,670 by 2042
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 East Boyer River built?

It was built in 1997, making it 28 years old in 2025.

What condition is US 30 over East 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 February 2023.

How much traffic does US 30 over East Boyer River carry?

About 3,670 vehicles per day (2022 count), of which roughly 20% are trucks.

How long is US 30 over East Boyer River?

The structure is 113 ft (34.4 m) long with a longest span of 43 ft (13.1 m) and a deck 47 ft wide.

Who owns US 30 over East Boyer River?

It is owned by the State Highway Agency.