US Bridges

Ia 175 over Stream

Good

Ida County, Iowa · 2.1 Mi. E of E JCT US 59 · Structure no. 000000000605710

Built
1939
86 years old, rebuilt 1989
Condition
Good
inspected April 2023
Type
Slab
Concrete Continuous
Length
21 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 and reconstructed in 1989, 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,780 vehicles a day, roughly 15% of them trucks, projected to reach 1,780 by 2042. The structure is 21 ft (6.4 m) long and 43 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

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CarriesIa 175
CrossesStream
Location2.1 Mi. E of E JCT US 59
RouteState Highway 175
CountyIda County
StateIowa
Coordinates42.33753, -95.39972
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating47.2 US tons
Inventory rating28.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width43 ft (13 m)
Roadway width39 ft (11.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,780 (2022)
Projected traffic1,780 by 2042
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 statusHistorical significance not determinable at this time
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. It was reconstructed in 1989.

What condition is Ia 175 over Stream in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2023.

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 21 ft (6.4 m) long with a longest span of 10 ft (3 m) and a deck 43 ft wide.

Who owns Ia 175 over Stream?

It is owned by the State Highway Agency.