US Bridges

Ia 175 over Branch Odebolt River

Fair

Ida County, Iowa · 2.5 Mi. W of Jct. SR M31 · Structure no. 000000000029280

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 Branch Odebolt River is a concrete continuous slab carrying Ia 175 over Branch Odebolt River 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 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 1,780 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 41 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesIa 175
CrossesBranch Odebolt River
Location2.5 Mi. W of Jct. SR M31
RouteState Highway 175
CountyIda County
StateIowa
Coordinates42.33777, -95.39126
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.1 US tons
Inventory rating28.9 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 width41 ft (12.4 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 Branch Odebolt River built?

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

What condition is Ia 175 over Branch Odebolt River 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 Branch Odebolt River carry?

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

How long is Ia 175 over Branch Odebolt River?

The structure is 25 ft (7.6 m) long with a longest span of 12 ft (3.7 m) and a deck 41 ft wide.

Who owns Ia 175 over Branch Odebolt River?

It is owned by the State Highway Agency.