US Bridges

US 30 over Old Channel Boyer River

Good

Harrison County, Iowa · 0.7 Mi. W of SR F32 · Structure no. 000000000027481

Built
1983
42 years old
Condition
Good
inspected August 2023
Type
Slab
Concrete Continuous
Length
73 ft
3 main spans
Daily traffic
4,490
2022 count
Owner
State
State Highway Agency

About this bridge

US 30 over Old Channel Boyer River is a concrete continuous slab carrying US 30 over Old Channel Boyer River in Harrison County, Iowa. It was built in 1983, so it is 42 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 4,490 vehicles a day, roughly 17% of them trucks, projected to reach 4,490 by 2043. The structure is 73 ft (22.3 m) long and 47 ft wide. If it were closed, the detour would be 34.2 mi (55 km).

CarriesUS 30
CrossesOld Channel Boyer River
Location0.7 Mi. W of SR F32
RouteU.S. Route 30
StateIowa
Coordinates41.72113, -95.70284
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 protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.9 US tons
Inventory rating30.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length73 ft (22.3 m)
Longest span28 ft (8.5 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,490 (2022)
Projected traffic4,490 by 2043
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed34.2 mi (55 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 Old Channel Boyer River built?

It was built in 1983, making it 42 years old in 2025.

What condition is US 30 over Old Channel 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 August 2023.

How much traffic does US 30 over Old Channel Boyer River carry?

About 4,490 vehicles per day (2022 count), of which roughly 17% are trucks.

How long is US 30 over Old Channel Boyer River?

The structure is 73 ft (22.3 m) long with a longest span of 28 ft (8.5 m) and a deck 47 ft wide.

Who owns US 30 over Old Channel Boyer River?

It is owned by the State Highway Agency.