US Bridges

Ia 9 over Des Moines River

Fair

Emmet County, Iowa · 0.6 Mi. W of Jct. Ia 4 · Structure no. 000000000024301

Built
1975
50 years old
Condition
Fair
inspected July 2024
Type
Slab
Concrete Continuous
Length
286 ft
6 main spans
Daily traffic
8,200
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 9 over Des Moines River is a concrete continuous slab carrying Ia 9 over Des Moines River in Emmet County, Iowa. It was built in 1975, so it is 50 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 8,200 vehicles a day, roughly 6% of them trucks, projected to reach 8,200 by 2044. The structure is 286 ft (87.2 m) long and 70 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesIa 9
CrossesDes Moines River
Location0.6 Mi. W of Jct. Ia 4
RouteState Highway 9
CountyEmmet County
StateIowa
Coordinates43.40192, -94.84479
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71 US tons
Inventory rating42.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length286 ft (87.2 m)
Longest span48 ft (14.6 m)
Deck width70 ft (21.4 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,200 (2022)
Projected traffic8,200 by 2044
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed8.1 mi (13 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 Ia 9 over Des Moines River built?

It was built in 1975, making it 50 years old in 2025.

What condition is Ia 9 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 July 2024.

How much traffic does Ia 9 over Des Moines River carry?

About 8,200 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is Ia 9 over Des Moines River?

The structure is 286 ft (87.2 m) long with a longest span of 48 ft (14.6 m) and a deck 70 ft wide.

Who owns Ia 9 over Des Moines River?

It is owned by the State Highway Agency.