US Bridges

Ia 150 over Stream

Fair

Benton County, Iowa · 1.6 Mi. N Jct. SR E16 · Structure no. 000000000701140

Built
1940
85 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
3,330
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 150 over Stream is a concrete culvert carrying Ia 150 over Stream in Benton County, Iowa. It was built in 1940, so it is 85 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 3,330 vehicles a day, roughly 6% of them trucks, projected to reach 3,330 by 2044. The structure is 21 ft (6.3 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesIa 150
CrossesStream
Location1.6 Mi. N Jct. SR E16
RouteState Highway 150
CountyBenton County
StateIowa
Coordinates42.2075, -92.01745
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 protection9 ExcellentNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating20.3 US tons
Inventory rating15 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length21 ft (6.3 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 traffic3,330 (2022)
Projected traffic3,330 by 2044
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ia 150 over Stream built?

It was built in 1940, making it 85 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 September 2024.

How much traffic does Ia 150 over Stream carry?

About 3,330 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is Ia 150 over Stream?

The structure is 21 ft (6.3 m) long with a longest span of 10 ft (3 m).

Who owns Ia 150 over Stream?

It is owned by the State Highway Agency.