US Bridges

Ia 60 NB over Floyd River Tributary

Fair

Sioux County, Iowa · 0.5 Mi. S of SR K64 · Structure no. 000000000048590

Built
1932
93 years old, rebuilt 1967
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
62 ft
1 main span
Daily traffic
3,200
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 60 NB over Floyd River Tributary is a steel stringer/multi-beam or girder carrying Ia 60 NB over Floyd River Tributary in Sioux County, Iowa. It was built in 1932 and reconstructed in 1967, so it is 93 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 5 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 3,200 vehicles a day, roughly 22% of them trucks, projected to reach 3,200 by 2044. The structure is 62 ft (18.9 m) long and 47 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesIa 60 NB
CrossesFloyd River Tributary
Location0.5 Mi. S of SR K64
RouteState Highway 60
CountySioux County
StateIowa
Coordinates42.92384, -96.0634
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.2 US tons
Inventory rating25.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length62 ft (18.9 m)
Longest span59 ft (18 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,200 (2022)
Projected traffic3,200 by 2044
Trucks22%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ia 60 NB over Floyd River Tributary built?

It was built in 1932, making it 93 years old in 2025. It was reconstructed in 1967.

What condition is Ia 60 NB over Floyd River Tributary 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 May 2024.

How much traffic does Ia 60 NB over Floyd River Tributary carry?

About 3,200 vehicles per day (2022 count), of which roughly 22% are trucks.

How long is Ia 60 NB over Floyd River Tributary?

The structure is 62 ft (18.9 m) long with a longest span of 59 ft (18 m) and a deck 47 ft wide.

Who owns Ia 60 NB over Floyd River Tributary?

It is owned by the State Highway Agency.