US 218 over Stream

Fair

Benton County, Iowa · 0.8 Mi. S of SR E-22 · Structure no. 000000000014320

Built: 1956; 69 years old, rebuilt 1992
Condition: Fair; inspected January 2024
Type: Culvert; Concrete Continuous
Length: 45 ft; 3 main spans
Daily traffic: 3,530; 2022 count
Owner: State; State Highway Agency

About this bridge

US 218 over Stream is a concrete continuous culvert carrying US 218 over Stream in Benton County, Iowa. It was built in 1956 and reconstructed in 1992, so it is 69 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 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 3,530 vehicles a day, roughly 14% of them trucks, projected to reach 3,530 by 2044. The structure is 45 ft (13.7 m) long. If it were closed, the detour would be 23 mi (37 km).

Location

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CarriesUS 218

CrossesStream

Location0.8 Mi. S of SR E-22

RouteU.S. Route 218

CountyBenton County

StateIowa

Coordinates42.12907, -92.02834

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.

Component	Rating	Meaning
Channel and channel protection	7 Good	Some minor problems.
Culvert	6 Satisfactory	Structural elements show some minor deterioration.

Last inspectionJanuary 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

Waterway adequacy7: Better than present minimum criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating34.6 US tons

Inventory rating20.7 US tons

Structure

Structure typeCulvert

MaterialConcrete Continuous

DeckNot applicable

Main spans3

Design loadH 20

Structure length45 ft (13.7 m)

Longest span10 ft (3 m)

Deck width0 ft (0 m)

Roadway width0 ft (0 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,530 (2022)

Projected traffic3,530 by 2044

Trucks14%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed23 mi (37 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—

NavigationNo navigation control on waterway

Frequently asked questions

When was US 218 over Stream built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 1992.

What condition is US 218 over Stream 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 January 2024.

How much traffic does US 218 over Stream carry?

About 3,530 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is US 218 over Stream?

The structure is 45 ft (13.7 m) long with a longest span of 10 ft (3 m).

Who owns US 218 over Stream?

It is owned by the State Highway Agency.