US Bridges

WB US 30 over Ia 14

Good

Marshall County, Iowa · At the Jct. of Ia 14 · Structure no. 000000000601620

Built
1995
30 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
272 ft
3 main spans
Daily traffic
3,600
2023 count
Owner
State
State Highway Agency

About this bridge

WB US 30 over Ia 14 is a steel continuous stringer/multi-beam or girder carrying WB US 30 over Ia 14 in Marshall County, Iowa. It was built in 1995, so it is 30 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 3,600 vehicles a day, roughly 24% of them trucks, projected to reach 3,600 by 2043. The structure is 272 ft (82.9 m) long and 43 ft wide.

CarriesWB US 30
CrossesIa 14
LocationAt the Jct. of Ia 14
RouteU.S. Route 30
StateIowa
Coordinates42.00392, -92.91189
Functional classUrban Other Principal Arterial

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.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.1 US tons
Inventory rating44.5 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length272 ft (82.9 m)
Longest span128 ft (39 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,600 (2023)
Projected traffic3,600 by 2043
Trucks24%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was WB US 30 over Ia 14 built?

It was built in 1995, making it 30 years old in 2025.

What condition is WB US 30 over Ia 14 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 September 2023.

How much traffic does WB US 30 over Ia 14 carry?

About 3,600 vehicles per day (2023 count), of which roughly 24% are trucks.

How long is WB US 30 over Ia 14?

The structure is 272 ft (82.9 m) long with a longest span of 128 ft (39 m) and a deck 43 ft wide.

Who owns WB US 30 over Ia 14?

It is owned by the State Highway Agency.