US Bridges

US 69 over Des Moines River

Fair

Polk County, Iowa · 1.4 Mi. S of Jct. I-235 · Structure no. 000000000040500

Built
1936
89 years old, rebuilt 1973
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
758 ft
6 main spans
Daily traffic
31,100
2022 count
Owner
State
State Highway Agency

About this bridge

US 69 over Des Moines River is a steel continuous stringer/multi-beam or girder carrying US 69 over Des Moines River in Polk County, Iowa. It was built in 1936 and reconstructed in 1973, so it is 89 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 5 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 31,100 vehicles a day, roughly 3% of them trucks, projected to reach 31,100 by 2043. The structure is 758 ft (231 m) long and 68 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesUS 69
CrossesDes Moines River
Location1.4 Mi. S of Jct. I-235
RouteU.S. Route 69
StateIowa
Coordinates41.57472, -93.59686
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating60.7 US tons
Inventory rating35.4 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length758 ft (231 m)
Longest span135 ft (41.1 m)
Deck width68 ft (20.7 m)
Roadway width52 ft (16 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31,100 (2022)
Projected traffic31,100 by 2043
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 69 over Des Moines River built?

It was built in 1936, making it 89 years old in 2025. It was reconstructed in 1973.

What condition is US 69 over Des Moines 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 April 2023.

How much traffic does US 69 over Des Moines River carry?

About 31,100 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is US 69 over Des Moines River?

The structure is 758 ft (231 m) long with a longest span of 135 ft (41.1 m) and a deck 68 ft wide.

Who owns US 69 over Des Moines River?

It is owned by the State Highway Agency.