US Bridges

US 218 NB over US 34

Fair

Henry County, Iowa · At the S Jct. U.S. 34 · Structure no. 000000000608005

Built
2001
24 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
268 ft
2 main spans
Daily traffic
3,450
2022 count
Owner
State
State Highway Agency

About this bridge

US 218 NB over US 34 is a steel continuous stringer/multi-beam or girder carrying US 218 NB over US 34 in Henry County, Iowa. It was built in 2001, so it is 24 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 6 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 3,450 vehicles a day, roughly 41% of them trucks, projected to reach 3,450 by 2042. The structure is 268 ft (81.7 m) long and 63 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 218 NB
CrossesUS 34
LocationAt the S Jct. U.S. 34
RouteU.S. Route 218
CountyHenry County
StateIowa
Coordinates40.95894, -91.51924
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.8 US tons
Inventory rating43.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length268 ft (81.7 m)
Longest span133 ft (40.5 m)
Deck width63 ft (19.2 m)
Roadway width59 ft (18.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,450 (2022)
Projected traffic3,450 by 2042
Trucks41%
Lanes on structure3
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.2 mi (2 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 218 NB over US 34 built?

It was built in 2001, making it 24 years old in 2025.

What condition is US 218 NB over US 34 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 April 2023.

How much traffic does US 218 NB over US 34 carry?

About 3,450 vehicles per day (2022 count), of which roughly 41% are trucks.

How long is US 218 NB over US 34?

The structure is 268 ft (81.7 m) long with a longest span of 133 ft (40.5 m) and a deck 63 ft wide.

Who owns US 218 NB over US 34?

It is owned by the State Highway Agency.