US Bridges

Ia 60 NB over Willow Creek

Good

Sioux County, Iowa · 0.7 Mi. N of Jct. SR B40 · Structure no. 000000000609290

Built
2003
22 years old
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
267 ft
3 main spans
Daily traffic
2,485
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 60 NB over Willow Creek is a prestressed concrete stringer/multi-beam or girder carrying Ia 60 NB over Willow Creek in Sioux County, Iowa. It was built in 2003, so it is 22 years old, younger 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 2,485 vehicles a day, roughly 29% of them trucks, projected to reach 2,485 by 2043. The structure is 267 ft (81.4 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesIa 60 NB
CrossesWillow Creek
Location0.7 Mi. N of Jct. SR B40
RouteState Highway 60
CountySioux County
StateIowa
Coordinates43.07972, -95.89958
Functional classRural Principal Arterial - Other

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85.9 US tons
Inventory rating37 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length267 ft (81.4 m)
Longest span121 ft (36.9 m)
Deck width43 ft (13 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,485 (2022)
Projected traffic2,485 by 2043
Trucks29%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Ia 60 NB over Willow Creek built?

It was built in 2003, making it 22 years old in 2025.

What condition is Ia 60 NB over Willow Creek 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 November 2023.

How much traffic does Ia 60 NB over Willow Creek carry?

About 2,485 vehicles per day (2022 count), of which roughly 29% are trucks.

How long is Ia 60 NB over Willow Creek?

The structure is 267 ft (81.4 m) long with a longest span of 121 ft (36.9 m) and a deck 43 ft wide.

Who owns Ia 60 NB over Willow Creek?

It is owned by the State Highway Agency.