US Bridges

NB US 65 over Willow Creek

Fair

Cerro Gordo County, Iowa · 0.1 Mi. N of WB Ia 122 · Structure no. 000000000018932

Built
1970
55 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
201 ft
3 main spans
Daily traffic
2,950
2023 count
Owner
State
State Highway Agency

About this bridge

NB US 65 over Willow Creek is a steel continuous stringer/multi-beam or girder carrying NB US 65 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 2,950 vehicles a day, roughly 3% of them trucks, projected to reach 2,950 by 2043. The structure is 201 ft (61.3 m) long and 56 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNB US 65
CrossesWillow Creek
Location0.1 Mi. N of WB Ia 122
RouteU.S. Route 65
CountyCerro Gordo County
StateIowa
Coordinates43.1484, -93.20077
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating73 US tons
Inventory rating43 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length201 ft (61.3 m)
Longest span80 ft (24.4 m)
Deck width56 ft (17.1 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,950 (2023)
Projected traffic2,950 by 2043
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was NB US 65 over Willow Creek built?

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

What condition is NB US 65 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 NB US 65 over Willow Creek carry?

About 2,950 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is NB US 65 over Willow Creek?

The structure is 201 ft (61.3 m) long with a longest span of 80 ft (24.4 m) and a deck 56 ft wide.

Who owns NB US 65 over Willow Creek?

It is owned by the State Highway Agency.