US Bridges

FM over Small

Fair

Dubuque County, Iowa · 088E10105 · Structure no. 000000000146211

Built
1980
45 years old
Condition
Fair
inspected May 2023
Type
Culvert
Steel
Length
22 ft
2 main spans
Daily traffic
71
2021 count
Owner
County
County Highway Agency

About this bridge

FM over Small is a steel culvert carrying FM over Small in Dubuque County, Iowa. It was built in 1980, so it is 45 years old, younger 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 71 vehicles a day, projected to reach 71 by 2043. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 3.1 mi (5 km).

CarriesFM
CrossesSmall
Location088E10105
RouteCounty Highway 0
StateIowa
Coordinates42.46188, -90.80081
Functional classRural Local

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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating34 US tons
Inventory rating25 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic71 (2021)
Projected traffic71 by 2043
Trucks0%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Small built?

It was built in 1980, making it 45 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 May 2023.

How much traffic does FM over Small carry?

About 71 vehicles per day (2021 count).

How long is FM over Small?

The structure is 22 ft (6.7 m) long with a longest span of 11 ft (3.4 m).

Who owns FM over Small?

It is owned by the County Highway Agency.