US Bridges

Fir over Willow Creek

FairPosted for load

Cerro Gordo County, Iowa · 096220104 · Structure no. 000000000106400

Built
1918
107 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
33 ft
1 main span
Daily traffic
82
2022 count
Owner
County
County Highway Agency

About this bridge

Fir over Willow Creek is a concrete stringer/multi-beam or girder carrying Fir over Willow Creek in Cerro Gordo County, Iowa. It was built in 1918, so it is 107 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 82 vehicles a day, projected to reach 82 by 2044. The structure is 33 ft (10.1 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesFir
CrossesWillow Creek
Location096220104
RouteCounty Highway 0
StateIowa
Coordinates43.16761, -93.38876
Functional classRural 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
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 inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.6 US tons
Inventory rating18.8 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length33 ft (10.1 m)
Longest span33 ft (10.1 m)
Deck width24 ft (7.4 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic82 (2022)
Projected traffic82 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Fir over Willow Creek built?

It was built in 1918, making it 107 years old in 2025.

What condition is Fir 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 February 2024.

How much traffic does Fir over Willow Creek carry?

About 82 vehicles per day (2022 count).

How long is Fir over Willow Creek?

The structure is 33 ft (10.1 m) long with a longest span of 33 ft (10.1 m) and a deck 24 ft wide.

Who owns Fir over Willow Creek?

It is owned by the County Highway Agency.