US Bridges

County RD over Willow Creek

Fair

Sioux County, Iowa · 095430310 · Structure no. 000000000048621

Built
1991
34 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete Continuous
Length
181 ft
5 main spans
Daily traffic
1,347
2022 count
Owner
County
County Highway Agency

About this bridge

County RD over Willow Creek is a concrete continuous slab carrying County RD over Willow Creek in Sioux County, Iowa. It was built in 1991, so it is 34 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 1,347 vehicles a day, roughly 15% of them trucks, projected to reach 1,347 by 2043. The structure is 181 ft (55.2 m) long and 47 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesCounty RD
CrossesWillow Creek
Location095430310
RouteCounty Highway 0
CountySioux County
StateIowa
Coordinates43.07748, -95.90469
Functional classRural Major Collector

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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.3 US tons
Inventory rating41.6 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length181 ft (55.2 m)
Longest span39 ft (11.9 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,347 (2022)
Projected traffic1,347 by 2043
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 County RD over Willow Creek built?

It was built in 1991, making it 34 years old in 2025.

What condition is County RD over Willow Creek 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 March 2023.

How much traffic does County RD over Willow Creek carry?

About 1,347 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is County RD over Willow Creek?

The structure is 181 ft (55.2 m) long with a longest span of 39 ft (11.9 m) and a deck 47 ft wide.

Who owns County RD over Willow Creek?

It is owned by the County Highway Agency.