US Bridges

N 40th ST over Willow Creek

Fair

Cerro Gordo County, Iowa · 096210900 · Structure no. 000000000106320

Built
1970
55 years old
Condition
Fair
inspected March 2024
Type
Slab
Concrete Continuous
Length
80 ft
3 main spans
Daily traffic
731
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

N 40th ST over Willow Creek is a concrete continuous slab carrying N 40th ST over Willow Creek in Cerro Gordo County, Iowa. It was built in 1970, so it is 55 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 5 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 731 vehicles a day, projected to reach 731 by 2044. The structure is 80 ft (24.4 m) long and 47 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesN 40th ST
CrossesWillow Creek
Location096210900
RouteCity Street 0
CountyCerro Gordo County
StateIowa
Coordinates43.14764, -93.33973
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating72.3 US tons
Inventory rating43.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length80 ft (24.4 m)
Longest span31 ft (9.4 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic731 (2022)
Projected traffic731 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was N 40th ST over Willow Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is N 40th ST 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 2024.

How much traffic does N 40th ST over Willow Creek carry?

About 731 vehicles per day (2022 count).

How long is N 40th ST over Willow Creek?

The structure is 80 ft (24.4 m) long with a longest span of 31 ft (9.4 m) and a deck 47 ft wide.

Who owns N 40th ST over Willow Creek?

It is owned by the City or Municipal Highway Agency.