FM over Stream

Fair

Mahaska County, Iowa · 076150905 · Structure no. 000000000237290

Built: 1962; 63 years old
Condition: Fair; inspected December 2023
Type: Culvert; Concrete Continuous
Length: 21 ft; 2 main spans
Daily traffic: 370; 2022 count
Owner: County; County Highway Agency

About this bridge

FM over Stream is a concrete continuous culvert carrying FM over Stream in Mahaska County, Iowa. It was built in 1962, so it is 63 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 370 vehicles a day, roughly 25% of them trucks, projected to reach 370 by 2043. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesFM

CrossesStream

Location076150905

RouteCounty Highway 0

CountyMahaska County

StateIowa

Coordinates41.40807, -92.59189

Functional classRural Major Collector

Condition and inspection

Fair

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

Component	Rating	Meaning
Channel and channel protection	6 Satisfactory	Structural elements show some minor deterioration.
Culvert	6 Satisfactory	Structural elements show some minor deterioration.

Last inspectionDecember 2023

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation6: Equal to present minimum criteria

Waterway adequacy7: Better than present minimum criteria

Approach roadway alignment6: Equal to present minimum criteria

Operating rating76.5 US tons

Inventory rating45.7 US tons

Structure

Structure typeCulvert

MaterialConcrete Continuous

DeckNot applicable

Main spans2

Design loadH 20

Structure length21 ft (6.4 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 traffic370 (2022)

Projected traffic370 by 2043

Trucks25%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed3.1 mi (5 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 proposedOther structural work, including hydraulic replacements

Estimated improvement cost—

NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Stream built?

It was built in 1962, making it 63 years old in 2025.

What condition is FM over Stream 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 2023.

How much traffic does FM over Stream carry?

About 370 vehicles per day (2022 count), of which roughly 25% are trucks.

How long is FM over Stream?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).

Who owns FM over Stream?

It is owned by the County Highway Agency.