US Bridges

Ia 3 over Des Moines River

Good

Humboldt County, Iowa · 1.6 Mi. W of US 169 · Structure no. 000000000028981

Built
2010
15 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
412 ft
3 main spans
Daily traffic
2,850
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 3 over Des Moines River is a prestressed concrete stringer/multi-beam or girder carrying Ia 3 over Des Moines River in Humboldt County, Iowa. It was built in 2010, so it is 15 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 2,850 vehicles a day, roughly 18% of them trucks, projected to reach 2,850 by 2042. The structure is 412 ft (125.7 m) long and 47 ft wide.

CarriesIa 3
CrossesDes Moines River
Location1.6 Mi. W of US 169
RouteState Highway 3
StateIowa
Coordinates42.73191, -94.25881
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 protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99.8 US tons
Inventory rating41.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length412 ft (125.7 m)
Longest span137 ft (41.8 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,850 (2022)
Projected traffic2,850 by 2042
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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 Ia 3 over Des Moines River built?

It was built in 2010, making it 15 years old in 2025.

What condition is Ia 3 over Des Moines 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 April 2023.

How much traffic does Ia 3 over Des Moines River carry?

About 2,850 vehicles per day (2022 count), of which roughly 18% are trucks.

How long is Ia 3 over Des Moines River?

The structure is 412 ft (125.7 m) long with a longest span of 137 ft (41.8 m) and a deck 47 ft wide.

Who owns Ia 3 over Des Moines River?

It is owned by the State Highway Agency.