US Bridges

FM over Small Stream

Fair

Henry County, Iowa · 071073202 · Structure no. 000000000180761

Built
1974
51 years old
Condition
Fair
inspected February 2023
Type
Culvert
Concrete Continuous
Length
26 ft
2 main spans
Daily traffic
50
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Small Stream is a concrete continuous culvert carrying FM over Small Stream in Henry County, Iowa. It was built in 1974, so it is 51 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 50 vehicles a day, projected to reach 50 by 2043. The structure is 26 ft (7.8 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesFM
CrossesSmall Stream
Location071073202
RouteCounty Highway 0
CountyHenry County
StateIowa
Coordinates40.90691, -91.69859
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2023
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
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length26 ft (7.8 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2022)
Projected traffic50 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 1974, making it 51 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 February 2023.

How much traffic does FM over Small Stream carry?

About 50 vehicles per day (2022 count).

How long is FM over Small Stream?

The structure is 26 ft (7.8 m) long with a longest span of 12 ft (3.7 m).

Who owns FM over Small Stream?

It is owned by the County Highway Agency.