US Bridges

FM over Small Stream

Fair

Sioux County, Iowa · 095431103 · Structure no. 000000000309776

Built
1984
41 years old
Condition
Fair
inspected March 2023
Type
Culvert
Concrete
Length
31 ft
2 main spans
Daily traffic
1,147
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Small Stream is a concrete culvert carrying FM over Small Stream in Sioux County, Iowa. It was built in 1984, so it is 41 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 1,147 vehicles a day, roughly 13% of them trucks, projected to reach 1,147 by 2043. The structure is 31 ft (9.4 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesFM
CrossesSmall Stream
Location095431103
RouteCounty Highway 0
CountySioux County
StateIowa
Coordinates43.06923, -95.88759
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 protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating37.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length31 ft (9.4 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,147 (2022)
Projected traffic1,147 by 2043
Trucks13%
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Small Stream built?

It was built in 1984, making it 41 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 March 2023.

How much traffic does FM over Small Stream carry?

About 1,147 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is FM over Small Stream?

The structure is 31 ft (9.4 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.