US Bridges

US 30 over Boyer River

Fair

Crawford County, Iowa · 2.7 Mi. W of W Jct. US 59 · Structure no. 000000000021310

Built
1959
66 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
284 ft
3 main spans
Daily traffic
3,520
2021 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 Crawford County, Iowa. It was built in 1959, so it is 66 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 3,520 vehicles a day, roughly 21% of them trucks, projected to reach 3,520 by 2043. The structure is 284 ft (86.6 m) long and 36 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesUS 30
CrossesBoyer River
Location2.7 Mi. W of W Jct. US 59
RouteU.S. Route 30
CountyCrawford County
StateIowa
Coordinates41.98049, -95.41224
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.7 US tons
Inventory rating37.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length284 ft (86.6 m)
Longest span109 ft (33.2 m)
Deck width36 ft (11 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,520 (2021)
Projected traffic3,520 by 2043
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 1959, making it 66 years old in 2025.

What condition is US 30 over Boyer River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2023.

How much traffic does US 30 over Boyer River carry?

About 3,520 vehicles per day (2021 count), of which roughly 21% are trucks.

How long is US 30 over Boyer River?

The structure is 284 ft (86.6 m) long with a longest span of 109 ft (33.2 m) and a deck 36 ft wide.

Who owns US 30 over Boyer River?

It is owned by the State Highway Agency.