FM over Small Stream

Fair

Louisa County, Iowa · 073022906 · Structure no. 000000000223570

Built: 1966; 59 years old
Condition: Fair; inspected May 2024
Type: Slab; Concrete Continuous
Length: 127 ft; 3 main spans
Daily traffic: 110; 2022 count
Owner: County; County Highway Agency

About this bridge

FM over Small Stream is a concrete continuous slab carrying FM over Small Stream in Louisa County, Iowa. It was built in 1966, so it is 59 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 110 vehicles a day, projected to reach 110 by 2044. The structure is 127 ft (38.7 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesFM

CrossesSmall Stream

Location073022906

RouteCounty Highway 0

CountyLouisa County

StateIowa

Coordinates41.09663, -91.1184

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.

Component	Rating	Meaning
Deck	6 Satisfactory	Structural elements show some minor deterioration.
Superstructure	6 Satisfactory	Structural elements show some minor deterioration.
Substructure	7 Good	Some minor problems.
Channel and channel protection	7 Good	Some minor problems.

Last inspectionMay 2024

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation6: Equal to present minimum criteria

Deck geometry6: Equal to present minimum criteria

Waterway adequacy7: Better than present minimum criteria

Approach roadway alignment6: Equal to present minimum criteria

Operating rating57.5 US tons

Inventory rating33.5 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadH 20

Structure length127 ft (38.7 m)

Longest span49 ft (14.9 m)

Deck width32 ft (9.9 m)

Roadway width28 ft (8.5 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic110 (2022)

Projected traffic110 by 2044

Trucks0%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed5 mi (8 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 Small Stream built?

It was built in 1966, making it 59 years old in 2025.

What condition is FM over Small 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 May 2024.

How much traffic does FM over Small Stream carry?

About 110 vehicles per day (2022 count).

How long is FM over Small Stream?

The structure is 127 ft (38.7 m) long with a longest span of 49 ft (14.9 m) and a deck 32 ft wide.

Who owns FM over Small Stream?

It is owned by the County Highway Agency.