US Bridges

Ia 150 over Stream

Fair

Benton County, Iowa · 0.1 Mi. S of Jct. I-380 · Structure no. 000000000014491

Built
1981
44 years old
Condition
Fair
inspected February 2023
Type
Culvert
Concrete Continuous
Length
24 ft
2 main spans
Daily traffic
1,230
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 150 over Stream is a concrete continuous culvert carrying Ia 150 over Stream in Benton County, Iowa. It was built in 1981, so it is 44 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 1,230 vehicles a day, roughly 12% of them trucks, projected to reach 1,230 by 2043. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesIa 150
CrossesStream
Location0.1 Mi. S of Jct. I-380
RouteState Highway 150
CountyBenton County
StateIowa
Coordinates42.24322, -91.89089
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating64.2 US tons
Inventory rating38.5 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span8 ft (2.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,230 (2022)
Projected traffic1,230 by 2043
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Ia 150 over Stream built?

It was built in 1981, making it 44 years old in 2025.

What condition is Ia 150 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 February 2023.

How much traffic does Ia 150 over Stream carry?

About 1,230 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is Ia 150 over Stream?

The structure is 24 ft (7.3 m) long with a longest span of 8 ft (2.4 m).

Who owns Ia 150 over Stream?

It is owned by the State Highway Agency.