US Bridges

US 75 over W Fork Floyd River

Fair

Sioux County, Iowa · 2.3 Mi. S of SR B58 · Structure no. 000000000048380

Built
1972
53 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
238 ft
3 main spans
Daily traffic
3,610
2022 count
Owner
State
State Highway Agency

About this bridge

US 75 over W Fork Floyd River is a prestressed concrete stringer/multi-beam or girder carrying US 75 over W Fork Floyd River in Sioux County, Iowa. It was built in 1972, so it is 53 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.

It carries about 3,610 vehicles a day, roughly 31% of them trucks, projected to reach 3,610 by 2042. The structure is 238 ft (72.5 m) long and 47 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesUS 75
CrossesW Fork Floyd River
Location2.3 Mi. S of SR B58
RouteU.S. Route 75
StateIowa
Coordinates42.93267, -96.17506
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
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 evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.1 US tons
Inventory rating49.8 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length238 ft (72.5 m)
Longest span81 ft (24.8 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,610 (2022)
Projected traffic3,610 by 2042
Trucks31%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US 75 over W Fork Floyd River built?

It was built in 1972, making it 53 years old in 2025.

What condition is US 75 over W Fork Floyd 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 May 2024.

How much traffic does US 75 over W Fork Floyd River carry?

About 3,610 vehicles per day (2022 count), of which roughly 31% are trucks.

How long is US 75 over W Fork Floyd River?

The structure is 238 ft (72.5 m) long with a longest span of 81 ft (24.8 m) and a deck 47 ft wide.

Who owns US 75 over W Fork Floyd River?

It is owned by the State Highway Agency.