US Bridges

Ia 175 over Branch Odebolt Creek

Fair

Ida County, Iowa · 0.5 Mi. W of SR M31 · Structure no. 000000000029301

Built
1985
40 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
58 ft
1 main span
Daily traffic
1,780
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 175 over Branch Odebolt Creek is a prestressed concrete stringer/multi-beam or girder carrying Ia 175 over Branch Odebolt Creek in Ida County, Iowa. It was built in 1985, so it is 40 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 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 1,780 vehicles a day, roughly 15% of them trucks, projected to reach 1,780 by 2042. The structure is 58 ft (17.7 m) long and 43 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

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CarriesIa 175
CrossesBranch Odebolt Creek
Location0.5 Mi. W of SR M31
RouteState Highway 175
CountyIda County
StateIowa
Coordinates42.33537, -95.35164
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating92.3 US tons
Inventory rating34.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length58 ft (17.7 m)
Longest span55 ft (16.8 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 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 closed14.9 mi (24 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 Creek built?

It was built in 1985, making it 40 years old in 2025.

What condition is Ia 175 over Branch Odebolt 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 April 2023.

How much traffic does Ia 175 over Branch Odebolt Creek carry?

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

How long is Ia 175 over Branch Odebolt Creek?

The structure is 58 ft (17.7 m) long with a longest span of 55 ft (16.8 m) and a deck 43 ft wide.

Who owns Ia 175 over Branch Odebolt Creek?

It is owned by the State Highway Agency.