US Bridges

FM over Upper Iowa River

Fair

Winneshiek County, Iowa · 098080604 · Structure no. 000000000347531

Built
1986
39 years old
Condition
Fair
inspected March 2021
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
293 ft
3 main spans
Daily traffic
363
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Upper Iowa River is a prestressed concrete stringer/multi-beam or girder carrying FM over Upper Iowa River in Winneshiek 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 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 363 vehicles a day, roughly 13% of them trucks, projected to reach 363 by 2043. The structure is 293 ft (89.3 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesFM
CrossesUpper Iowa River
Location098080604
RouteCounty Highway 0
CountyWinneshiek County
StateIowa
Coordinates43.33971, -91.83359
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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating110.1 US tons
Inventory rating65.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length293 ft (89.3 m)
Longest span97 ft (29.6 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic363 (2022)
Projected traffic363 by 2043
Trucks13%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Upper Iowa River built?

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

What condition is FM over Upper Iowa River 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 2021.

How much traffic does FM over Upper Iowa River carry?

About 363 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is FM over Upper Iowa River?

The structure is 293 ft (89.3 m) long with a longest span of 97 ft (29.6 m) and a deck 30 ft wide.

Who owns FM over Upper Iowa River?

It is owned by the County Highway Agency.