US Bridges

US 75 SB over Floyd River

Fair

Woodbury County, Iowa · 5.3 Mi. N of US 20/IA 12 · Structure no. 000000000606635

Built
1999
26 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
784 ft
7 main spans
Daily traffic
5,650
2022 count
Owner
State
State Highway Agency

About this bridge

US 75 SB over Floyd River is a prestressed concrete stringer/multi-beam or girder carrying US 75 SB over Floyd River in Woodbury County, Iowa. It was built in 1999, so it is 26 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 5,650 vehicles a day, roughly 16% of them trucks, projected to reach 5,650 by 2044. The structure is 784 ft (239 m) long and 51 ft wide.

Location

Open in Google Maps
CarriesUS 75 SB
CrossesFloyd River
Location5.3 Mi. N of US 20/IA 12
RouteU.S. Route 75
CountyWoodbury County
StateIowa
Coordinates42.54616, -96.3408
Functional classUrban Other Principal Arterial

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78.8 US tons
Inventory rating44.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length784 ft (239 m)
Longest span112 ft (34.1 m)
Deck width51 ft (15.6 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,650 (2022)
Projected traffic5,650 by 2044
Trucks16%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 SB over Floyd River built?

It was built in 1999, making it 26 years old in 2025.

What condition is US 75 SB over 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 July 2024.

How much traffic does US 75 SB over Floyd River carry?

About 5,650 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is US 75 SB over Floyd River?

The structure is 784 ft (239 m) long with a longest span of 112 ft (34.1 m) and a deck 51 ft wide.

Who owns US 75 SB over Floyd River?

It is owned by the State Highway Agency.