Ia 175 over Stream

Fair

Ida County, Iowa · 0.9 Mi. W of Jct. SR M31 · Structure no. 000000000029290

Built: 1939; 86 years old
Condition: Fair; inspected November 2024
Type: Slab; Concrete Continuous
Length: 25 ft; 2 main spans
Daily traffic: 1,780; 2022 count
Owner: State; State Highway Agency

About this bridge

Ia 175 over Stream is a concrete continuous slab carrying Ia 175 over Stream in Ida County, Iowa. It was built in 1939, so it is 86 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 1,780 vehicles a day, roughly 15% of them trucks, projected to reach 1,780 by 2044. The structure is 25 ft (7.6 m) long and 40 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

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CarriesIa 175

CrossesStream

Location0.9 Mi. W of Jct. SR M31

RouteState Highway 175

CountyIda County

StateIowa

Coordinates42.33585, -95.36097

Functional classRural Minor Arterial

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
Deck	6 Satisfactory	Structural elements show some minor deterioration.
Superstructure	6 Satisfactory	Structural elements show some minor deterioration.
Substructure	7 Good	Some minor problems.
Channel and channel protection	7 Good	Some minor problems.

Last inspectionNovember 2024

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour within limits of footing or piles

Structural evaluation6: Equal to present minimum criteria

Deck geometry6: Equal to present minimum criteria

Waterway adequacy7: Better than present minimum criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating46.2 US tons

Inventory rating27.7 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans2

Design loadH 15

Structure length25 ft (7.6 m)

Longest span12 ft (3.7 m)

Deck width40 ft (12.3 m)

Roadway width37 ft (11.2 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,780 (2022)

Projected traffic1,780 by 2044

Trucks15%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed14.3 mi (23 km)

TollOn a free road

National Highway SystemNo

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 175 over Stream built?

It was built in 1939, making it 86 years old in 2025.

What condition is Ia 175 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 November 2024.

How much traffic does Ia 175 over Stream carry?

About 1,780 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is Ia 175 over Stream?

The structure is 25 ft (7.6 m) long with a longest span of 12 ft (3.7 m) and a deck 40 ft wide.

Who owns Ia 175 over Stream?

It is owned by the State Highway Agency.