US Bridges

Ia 150 over Otter Creek

Fair

Fayette County, Iowa · 0.2 Mi. N of Jct. Ia 56 · Structure no. 000000000024781

Built
1979
46 years old
Condition
Fair
inspected December 2024
Type
Slab
Concrete Continuous
Length
123 ft
3 main spans
Daily traffic
5,400
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 150 over Otter Creek is a concrete continuous slab carrying Ia 150 over Otter Creek in Fayette County, Iowa. It was built in 1979, so it is 46 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 5,400 vehicles a day, roughly 10% of them trucks, projected to reach 5,400 by 2044. The structure is 123 ft (37.5 m) long and 47 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesIa 150
CrossesOtter Creek
Location0.2 Mi. N of Jct. Ia 56
RouteState Highway 150
StateIowa
Coordinates42.95451, -91.81421
Functional classRural Principal Arterial - Other

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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating71.7 US tons
Inventory rating43 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length123 ft (37.5 m)
Longest span47 ft (14.3 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,400 (2022)
Projected traffic5,400 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

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 150 over Otter Creek built?

It was built in 1979, making it 46 years old in 2025.

What condition is Ia 150 over Otter 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 December 2024.

How much traffic does Ia 150 over Otter Creek carry?

About 5,400 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is Ia 150 over Otter Creek?

The structure is 123 ft (37.5 m) long with a longest span of 47 ft (14.3 m) and a deck 47 ft wide.

Who owns Ia 150 over Otter Creek?

It is owned by the State Highway Agency.