US Bridges

US 218 over Broadway ST

Fair

Black Hawk County, Iowa · 1.3 MI S of Jct. Ia 57 · Structure no. 000000000605940

Built
1989
36 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
350 ft
3 main spans
Daily traffic
23,100
2022 count
Owner
State
State Highway Agency

About this bridge

US 218 over Broadway ST is a steel continuous stringer/multi-beam or girder carrying US 218 over Broadway ST in Black Hawk County, Iowa. It was built in 1989, so it is 36 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 23,100 vehicles a day, roughly 7% of them trucks, projected to reach 23,100 by 2043. The structure is 350 ft (106.7 m) long and 120 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesUS 218
CrossesBroadway ST
Location1.3 MI S of Jct. Ia 57
RouteU.S. Route 218
CountyBlack Hawk County
StateIowa
Coordinates42.53756, -92.38973
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating99 US tons
Inventory rating61 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length350 ft (106.7 m)
Longest span153 ft (46.6 m)
Deck width120 ft (36.5 m)
Roadway width113 ft (34.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,100 (2022)
Projected traffic23,100 by 2043
Trucks7%
Lanes on structure6
Traffic directionTwo-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 over Broadway ST built?

It was built in 1989, making it 36 years old in 2025.

What condition is US 218 over Broadway ST 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 September 2023.

How much traffic does US 218 over Broadway ST carry?

About 23,100 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is US 218 over Broadway ST?

The structure is 350 ft (106.7 m) long with a longest span of 153 ft (46.6 m) and a deck 120 ft wide.

Who owns US 218 over Broadway ST?

It is owned by the State Highway Agency.