US Bridges

Ia 14 over Des Moines River & Res

Fair

Marion County, Iowa · 1.2 Mi. N of SR G40 · Structure no. 000000000035200

Built
1965
60 years old
Condition
Fair
inspected September 2024
Type
Girder and Floorbeam System
Steel Continuous
Length
5,653 ft
42 main spans
Daily traffic
3,820
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 14 over Des Moines River & Res is a steel continuous girder and floorbeam system carrying Ia 14 over Des Moines River & Res in Marion County, Iowa. It was built in 1965, so it is 60 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 3,820 vehicles a day, roughly 11% of them trucks, projected to reach 3,820 by 2044. The structure is 5,653 ft (1,723 m) long and 36 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

Open in Google Maps
CarriesIa 14
CrossesDes Moines River & Res
Location1.2 Mi. N of SR G40
RouteState Highway 14
CountyMarion County
StateIowa
Coordinates41.41039, -93.11117
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
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 alignment7: Better than present minimum criteria
Operating rating37.1 US tons
Inventory rating22.3 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans42
Design loadHS 20
Structure length5,653 ft (1,723 m)
Longest span143 ft (43.6 m)
Deck width36 ft (11 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,820 (2022)
Projected traffic3,820 by 2044
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ia 14 over Des Moines River & Res built?

It was built in 1965, making it 60 years old in 2025.

What condition is Ia 14 over Des Moines River & Res 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 September 2024.

How much traffic does Ia 14 over Des Moines River & Res carry?

About 3,820 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is Ia 14 over Des Moines River & Res?

The structure is 5,653 ft (1,723 m) long with a longest span of 143 ft (43.6 m) and a deck 36 ft wide.

Who owns Ia 14 over Des Moines River & Res?

It is owned by the State Highway Agency.