US Bridges

FM over Little Sioux

Good

Plymouth County, Iowa · 091432301 · Structure no. 000000000272261

Built
1991
34 years old
Condition
Good
inspected April 2024
Type
Slab
Concrete Continuous
Length
125 ft
3 main spans
Daily traffic
139
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Little Sioux is a concrete continuous slab carrying FM over Little Sioux in Plymouth County, Iowa. It was built in 1991, so it is 34 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 139 vehicles a day, roughly 24% of them trucks, projected to reach 139 by 2044. The structure is 125 ft (38.1 m) long and 33 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesFM
CrossesLittle Sioux
Location091432301
RouteCounty Highway 0
StateIowa
Coordinates42.69208, -95.88779
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating97.6 US tons
Inventory rating58.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length125 ft (38.1 m)
Longest span49 ft (14.9 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic139 (2022)
Projected traffic139 by 2044
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 Little Sioux built?

It was built in 1991, making it 34 years old in 2025.

What condition is FM over Little Sioux in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2024.

How much traffic does FM over Little Sioux carry?

About 139 vehicles per day (2022 count), of which roughly 24% are trucks.

How long is FM over Little Sioux?

The structure is 125 ft (38.1 m) long with a longest span of 49 ft (14.9 m) and a deck 33 ft wide.

Who owns FM over Little Sioux?

It is owned by the County Highway Agency.