US Bridges

FM RD M56 over Small Stream

Fair

Shelby County, Iowa · 080380302 · Structure no. 000000000306181

Built
1989
36 years old
Condition
Fair
inspected April 2022
Type
Culvert
Concrete
Length
30 ft
2 main spans
Daily traffic
34
2022 count
Owner
County
County Highway Agency

About this bridge

FM RD M56 over Small Stream is a concrete culvert carrying FM RD M56 over Small Stream in Shelby County, Iowa. It was built in 1989, so it is 36 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 34 vehicles a day, projected to reach 34 by 2043. The structure is 30 ft (9.1 m) long. If it were closed, the detour would be 5 mi (8 km).

CarriesFM RD M56
CrossesSmall Stream
Location080380302
RouteCounty Highway 0
StateIowa
Coordinates41.77385, -95.26736
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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2022
Inspection intervalevery 48 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 alignment8: Equal to present desirable criteria
Operating rating57.1 US tons
Inventory rating44.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span15 ft (4.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34 (2022)
Projected traffic34 by 2043
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM RD M56 over Small Stream built?

It was built in 1989, making it 36 years old in 2025.

What condition is FM RD M56 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 April 2022.

How much traffic does FM RD M56 over Small Stream carry?

About 34 vehicles per day (2022 count).

How long is FM RD M56 over Small Stream?

The structure is 30 ft (9.1 m) long with a longest span of 15 ft (4.6 m).

Who owns FM RD M56 over Small Stream?

It is owned by the County Highway Agency.