US Bridges

FM over Trout River

Good

Winneshiek County, Iowa · 098073404 · Structure no. 000000000347525

Built
1967
58 years old
Condition
Good
inspected April 2023
Type
Culvert
Concrete Continuous
Length
36 ft
3 main spans
Daily traffic
50
2021 count
Owner
County
County Highway Agency

About this bridge

FM over Trout River is a concrete continuous culvert carrying FM over Trout River in Winneshiek County, Iowa. It was built in 1967, so it is 58 years old, older 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 50 vehicles a day, projected to reach 50 by 2043. The structure is 36 ft (11 m) long. If it were closed, the detour would be 6.2 mi (10 km).

CarriesFM
CrossesTrout River
Location098073404
RouteCounty Highway 0
StateIowa
Coordinates43.266, -91.66162
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
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating27 US tons
Inventory rating20 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length36 ft (11 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 traffic50 (2021)
Projected traffic50 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Trout River built?

It was built in 1967, making it 58 years old in 2025.

What condition is FM over Trout 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 April 2023.

How much traffic does FM over Trout River carry?

About 50 vehicles per day (2021 count).

How long is FM over Trout River?

The structure is 36 ft (11 m) long with a longest span of 12 ft (3.7 m).

Who owns FM over Trout River?

It is owned by the County Highway Agency.