US Bridges

FM over Small

Fair

Iowa County, Iowa · 081102303 · Structure no. 000000000191320

Built
1966
59 years old
Condition
Fair
inspected March 2024
Type
Culvert
Concrete Continuous
Length
20 ft
2 main spans
Daily traffic
1,150
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Small is a concrete continuous culvert carrying FM over Small in Iowa 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 1,150 vehicles a day, roughly 9% of them trucks, projected to reach 1,150 by 2044. The structure is 20 ft (6.1 m) long. If it were closed, the detour would be 5 mi (8 km).

CarriesFM
CrossesSmall
Location081102303
RouteCounty Highway 0
StateIowa
Coordinates41.80629, -91.96854
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.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
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 alignment7: Better than present minimum criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadUnknown
Structure length20 ft (6.1 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 traffic1,150 (2022)
Projected traffic1,150 by 2044
Trucks9%
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 built?

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

What condition is FM over Small 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 March 2024.

How much traffic does FM over Small carry?

About 1,150 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is FM over Small?

The structure is 20 ft (6.1 m) long with a longest span of 10 ft (3 m).

Who owns FM over Small?

It is owned by the County Highway Agency.