US Bridges

Killdeer over Winnebago River

Fair

Cerro Gordo County, Iowa · 097211404 · Structure no. 000000000106821

Built
1984
41 years old
Condition
Fair
inspected January 2024
Type
Girder and Floorbeam System
Steel Continuous
Length
225 ft
3 main spans
Daily traffic
432
2022 count
Owner
County
County Highway Agency

About this bridge

Killdeer over Winnebago River is a steel continuous girder and floorbeam system carrying Killdeer over Winnebago River in Cerro Gordo County, Iowa. It was built in 1984, so it is 41 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 432 vehicles a day, roughly 27% of them trucks, projected to reach 432 by 2044. The structure is 225 ft (68.6 m) long and 34 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesKilldeer
CrossesWinnebago River
Location097211404
RouteCounty Highway 0
CountyCerro Gordo County
StateIowa
Coordinates43.21974, -93.29994
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 protection8 Very GoodNo problems noted.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.1 US tons
Inventory rating23.9 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length225 ft (68.6 m)
Longest span88 ft (26.8 m)
Deck width34 ft (10.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic432 (2022)
Projected traffic432 by 2044
Trucks27%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 Killdeer over Winnebago River built?

It was built in 1984, making it 41 years old in 2025.

What condition is Killdeer over Winnebago 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 January 2024.

How much traffic does Killdeer over Winnebago River carry?

About 432 vehicles per day (2022 count), of which roughly 27% are trucks.

How long is Killdeer over Winnebago River?

The structure is 225 ft (68.6 m) long with a longest span of 88 ft (26.8 m) and a deck 34 ft wide.

Who owns Killdeer over Winnebago River?

It is owned by the County Highway Agency.