US Bridges

Oriole Ave over Grass Waterway

Fair

O'Brien County, Iowa · 096410702 · Structure no. 000000000362020

Built
1965
60 years old, rebuilt 1997
Condition
Fair
inspected June 2024
Type
Culvert
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
409
2022 count
Owner
County
County Highway Agency

About this bridge

Oriole Ave over Grass Waterway is a concrete continuous culvert carrying Oriole Ave over Grass Waterway in O'Brien County, Iowa. It was built in 1965 and reconstructed in 1997, so it is 60 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 409 vehicles a day, roughly 33% of them trucks, projected to reach 409 by 2044. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesOriole Ave
CrossesGrass Waterway
Location096410702
RouteCounty Highway 0
CountyO'Brien County
StateIowa
Coordinates43.14505, -95.74243
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic409 (2022)
Projected traffic409 by 2044
Trucks33%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Oriole Ave over Grass Waterway built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1997.

What condition is Oriole Ave over Grass Waterway 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 June 2024.

How much traffic does Oriole Ave over Grass Waterway carry?

About 409 vehicles per day (2022 count), of which roughly 33% are trucks.

How long is Oriole Ave over Grass Waterway?

The structure is 25 ft (7.6 m) long with a longest span of 10 ft (3 m).

Who owns Oriole Ave over Grass Waterway?

It is owned by the County Highway Agency.