US Bridges

Ia 175 over Ioway Creek

Fair

Hamilton County, Iowa · 1.0 Miles W of Sec RD R27 · Structure no. 000000000026491

Built
1972
53 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
75 ft
1 main span
Daily traffic
1,090
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 175 over Ioway Creek is a prestressed concrete stringer/multi-beam or girder carrying Ia 175 over Ioway Creek in Hamilton County, Iowa. It was built in 1972, so it is 53 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 5 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 1,090 vehicles a day, roughly 8% of them trucks, projected to reach 1,090 by 2042. The structure is 75 ft (22.9 m) long and 48 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesIa 175
CrossesIoway Creek
Location1.0 Miles W of Sec RD R27
RouteState Highway 175
StateIowa
Coordinates42.26759, -93.89299
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating86.5 US tons
Inventory rating34.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length75 ft (22.9 m)
Longest span69 ft (21 m)
Deck width48 ft (14.5 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,090 (2022)
Projected traffic1,090 by 2042
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Ioway Creek built?

It was built in 1972, making it 53 years old in 2025.

What condition is Ia 175 over Ioway Creek 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 May 2024.

How much traffic does Ia 175 over Ioway Creek carry?

About 1,090 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is Ia 175 over Ioway Creek?

The structure is 75 ft (22.9 m) long with a longest span of 69 ft (21 m) and a deck 48 ft wide.

Who owns Ia 175 over Ioway Creek?

It is owned by the State Highway Agency.