US Bridges

Ia 22 over Iowa River Overflow

Fair

Washington County, Iowa · 1.7 Mi. E of Jct. US 218 · Structure no. 000000000051761

Built
1987
38 years old
Condition
Fair
inspected August 2024
Type
Slab
Concrete Continuous
Length
142 ft
4 main spans
Daily traffic
4,250
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 22 over Iowa River Overflow is a concrete continuous slab carrying Ia 22 over Iowa River Overflow in Washington County, Iowa. It was built in 1987, so it is 38 years old, younger 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 4,250 vehicles a day, roughly 13% of them trucks, projected to reach 4,250 by 2044. The structure is 142 ft (43.3 m) long and 43 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesIa 22
CrossesIowa River Overflow
Location1.7 Mi. E of Jct. US 218
RouteState Highway 22
CountyWashington County
StateIowa
Coordinates41.49626, -91.52415
Functional classRural Minor 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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 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 geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating95 US tons
Inventory rating57 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length142 ft (43.3 m)
Longest span51 ft (15.5 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,250 (2022)
Projected traffic4,250 by 2044
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

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 22 over Iowa River Overflow built?

It was built in 1987, making it 38 years old in 2025.

What condition is Ia 22 over Iowa River Overflow 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 August 2024.

How much traffic does Ia 22 over Iowa River Overflow carry?

About 4,250 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is Ia 22 over Iowa River Overflow?

The structure is 142 ft (43.3 m) long with a longest span of 51 ft (15.5 m) and a deck 43 ft wide.

Who owns Ia 22 over Iowa River Overflow?

It is owned by the State Highway Agency.