US Bridges

Ia 175 over Hardin Creek

Fair

Calhoun County, Iowa · 0.7 Mi. W of Jct. SR P21 · Structure no. 000000000017021

Built
1990
35 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
117 ft
3 main spans
Daily traffic
950
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 175 over Hardin Creek is a prestressed concrete stringer/multi-beam or girder carrying Ia 175 over Hardin Creek in Calhoun County, Iowa. It was built in 1990, so it is 35 years old, younger 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 950 vehicles a day, roughly 27% of them trucks, projected to reach 950 by 2044. The structure is 117 ft (35.7 m) long and 43 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

Location

Open in Google Maps
CarriesIa 175
CrossesHardin Creek
Location0.7 Mi. W of Jct. SR P21
RouteState Highway 175
CountyCalhoun County
StateIowa
Coordinates42.26704, -94.42009
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 protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating93.4 US tons
Inventory rating54.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length117 ft (35.7 m)
Longest span52 ft (15.9 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic950 (2022)
Projected traffic950 by 2044
Trucks27%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.7 mi (35 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 Hardin Creek built?

It was built in 1990, making it 35 years old in 2025.

What condition is Ia 175 over Hardin 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 July 2024.

How much traffic does Ia 175 over Hardin Creek carry?

About 950 vehicles per day (2022 count), of which roughly 27% are trucks.

How long is Ia 175 over Hardin Creek?

The structure is 117 ft (35.7 m) long with a longest span of 52 ft (15.9 m) and a deck 43 ft wide.

Who owns Ia 175 over Hardin Creek?

It is owned by the State Highway Agency.