US Bridges

Ia 220 over Iowa River

Fair

Iowa County, Iowa · 1.0 Miles North Jct. US 6 · Structure no. 000000000029651

Built
1978
47 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
582 ft
6 main spans
Daily traffic
1,050
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 220 over Iowa River is a prestressed concrete stringer/multi-beam or girder carrying Ia 220 over Iowa River in Iowa County, Iowa. It was built in 1978, so it is 47 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 1,050 vehicles a day, roughly 9% of them trucks, projected to reach 1,050 by 2044. The structure is 582 ft (177.4 m) long and 43 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesIa 220
CrossesIowa River
Location1.0 Miles North Jct. US 6
RouteState Highway 220
CountyIowa County
StateIowa
Coordinates41.78596, -91.96558
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
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 protection7 GoodSome minor problems.
Last inspectionJune 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 geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.9 US tons
Inventory rating30.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length582 ft (177.4 m)
Longest span96 ft (29.3 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,050 (2022)
Projected traffic1,050 by 2044
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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 220 over Iowa River built?

It was built in 1978, making it 47 years old in 2025.

What condition is Ia 220 over Iowa 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 June 2024.

How much traffic does Ia 220 over Iowa River carry?

About 1,050 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is Ia 220 over Iowa River?

The structure is 582 ft (177.4 m) long with a longest span of 96 ft (29.3 m) and a deck 43 ft wide.

Who owns Ia 220 over Iowa River?

It is owned by the State Highway Agency.