US Bridges

K64 over Floyd River

Good

Sioux County, Iowa · 094443302 · Structure no. 000000000308591

Built
1975
50 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
255 ft
3 main spans
Daily traffic
995
2021 count
Owner
County
County Highway Agency

About this bridge

K64 over Floyd River is a steel stringer/multi-beam or girder carrying K64 over Floyd River in Sioux County, Iowa. It was built in 1975, so it is 50 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 995 vehicles a day, roughly 18% of them trucks, projected to reach 995 by 2043. The structure is 255 ft (77.6 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesK64
CrossesFloyd River
Location094443302
RouteCounty Highway 0
StateIowa
Coordinates42.92091, -96.05646
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.7 US tons
Inventory rating33.5 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length255 ft (77.6 m)
Longest span98 ft (29.9 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic995 (2021)
Projected traffic995 by 2043
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 K64 over Floyd River built?

It was built in 1975, making it 50 years old in 2025.

What condition is K64 over Floyd 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 K64 over Floyd River carry?

About 995 vehicles per day (2021 count), of which roughly 18% are trucks.

How long is K64 over Floyd River?

The structure is 255 ft (77.6 m) long with a longest span of 98 ft (29.9 m) and a deck 30 ft wide.

Who owns K64 over Floyd River?

It is owned by the County Highway Agency.