US Bridges

SB US 218 over Ia 22

Fair

Washington County, Iowa · At Jct. of Ia 22 · Structure no. 000000000605595

Built
1984
41 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
237 ft
3 main spans
Daily traffic
7,050
2023 count
Owner
State
State Highway Agency

About this bridge

SB US 218 over Ia 22 is a steel continuous stringer/multi-beam or girder carrying SB US 218 over Ia 22 in Washington County, Iowa. It was built in 1984, so it is 41 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 7,050 vehicles a day, roughly 19% of them trucks, projected to reach 7,050 by 2043. The structure is 237 ft (72.2 m) long and 44 ft wide.

Location

Open in Google Maps
CarriesSB US 218
CrossesIa 22
LocationAt Jct. of Ia 22
RouteU.S. Route 218
CountyWashington County
StateIowa
Coordinates41.48738, -91.55162
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating86.4 US tons
Inventory rating51.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length237 ft (72.2 m)
Longest span110 ft (33.5 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,050 (2023)
Projected traffic7,050 by 2043
Trucks19%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SB US 218 over Ia 22 built?

It was built in 1984, making it 41 years old in 2025.

What condition is SB US 218 over Ia 22 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 March 2024.

How much traffic does SB US 218 over Ia 22 carry?

About 7,050 vehicles per day (2023 count), of which roughly 19% are trucks.

How long is SB US 218 over Ia 22?

The structure is 237 ft (72.2 m) long with a longest span of 110 ft (33.5 m) and a deck 44 ft wide.

Who owns SB US 218 over Ia 22?

It is owned by the State Highway Agency.