US Bridges

Ia 175 over Stream

Fair

Woodbury County, Iowa · 0.7 Mi. W of SR L37 · Structure no. 000000000053380

Built
1951
74 years old
Condition
Fair
inspected November 2023
Type
Culvert
Concrete Continuous
Length
40 ft
3 main spans
Daily traffic
1,230
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 175 over Stream is a concrete continuous culvert carrying Ia 175 over Stream in Woodbury County, Iowa. It was built in 1951, so it is 74 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 1,230 vehicles a day, roughly 12% of them trucks, projected to reach 1,230 by 2042. The structure is 40 ft (12.2 m) long. If it were closed, the detour would be 19.3 mi (31 km).

Location

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CarriesIa 175
CrossesStream
Location0.7 Mi. W of SR L37
RouteState Highway 175
CountyWoodbury County
StateIowa
Coordinates42.22921, -95.73211
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.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating20.3 US tons
Inventory rating15 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadH 15
Structure length40 ft (12.2 m)
Longest span12 ft (3.7 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 2042
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 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 1951, making it 74 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 2023.

How much traffic does Ia 175 over Stream carry?

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

How long is Ia 175 over Stream?

The structure is 40 ft (12.2 m) long with a longest span of 12 ft (3.7 m).

Who owns Ia 175 over Stream?

It is owned by the State Highway Agency.