US Bridges

FM over Floyd River

Good

O'Brien County, Iowa · 097410802 · Structure no. 000000000261881

Built
1986
39 years old
Condition
Good
inspected June 2024
Type
Slab
Concrete Continuous
Length
135 ft
3 main spans
Daily traffic
489
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Floyd River is a concrete continuous slab carrying FM over Floyd River in O'Brien County, Iowa. It was built in 1986, so it is 39 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 489 vehicles a day, roughly 38% of them trucks, projected to reach 489 by 2044. The structure is 135 ft (41.1 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesFM
CrossesFloyd River
Location097410802
RouteCounty Highway 0
StateIowa
Coordinates43.24018, -95.72343
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating42.1 US tons
Inventory rating32.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length135 ft (41.1 m)
Longest span53 ft (16.2 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic489 (2022)
Projected traffic489 by 2044
Trucks38%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Floyd River built?

It was built in 1986, making it 39 years old in 2025.

What condition is FM over Floyd River 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 June 2024.

How much traffic does FM over Floyd River carry?

About 489 vehicles per day (2022 count), of which roughly 38% are trucks.

How long is FM over Floyd River?

The structure is 135 ft (41.1 m) long with a longest span of 53 ft (16.2 m) and a deck 30 ft wide.

Who owns FM over Floyd River?

It is owned by the County Highway Agency.