US Bridges

FM over Upper Iowa River

FairPosted for load

Winneshiek County, Iowa · 100103502 · Structure no. 000000000349930

Built
1952
73 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
254 ft
3 main spans
Daily traffic
69
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Upper Iowa River is a steel continuous stringer/multi-beam or girder carrying FM over Upper Iowa River in Winneshiek County, Iowa. It was built in 1952, so it is 73 years old, older 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. Its operating status is: posted for load restriction.

It carries about 69 vehicles a day, projected to reach 69 by 2043. The structure is 254 ft (77.4 m) long and 22 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesFM
CrossesUpper Iowa River
Location100103502
RouteCounty Highway 0
CountyWinneshiek County
StateIowa
Coordinates43.43506, -92.00475
Functional classRural Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating27.1 US tons
Inventory rating20.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length254 ft (77.4 m)
Longest span98 ft (29.9 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic69 (2022)
Projected traffic69 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Upper Iowa River built?

It was built in 1952, making it 73 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 2023.

How much traffic does FM over Upper Iowa River carry?

About 69 vehicles per day (2022 count).

How long is FM over Upper Iowa River?

The structure is 254 ft (77.4 m) long with a longest span of 98 ft (29.9 m) and a deck 22 ft wide.

Who owns FM over Upper Iowa River?

It is owned by the County Highway Agency.