US Bridges

Waconia Ave over Willow Creek

Fair

Linn County, Iowa · 000000000 · Structure no. 000000000001200

Built
1975
50 years old
Condition
Fair
inspected April 2023
Type
Culvert
Concrete Continuous
Length
24 ft
2 main spans
Daily traffic
2,257
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Waconia Ave over Willow Creek is a concrete continuous culvert carrying Waconia Ave over Willow Creek in Linn County, Iowa. It was built in 1975, so it is 50 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.

It carries about 2,257 vehicles a day, projected to reach 2,257 by 2043. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesWaconia Ave
CrossesWillow Creek
Location000000000
RouteCity Street 0
CountyLinn County
StateIowa
Coordinates41.92693, -91.68054
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating34 US tons
Inventory rating25 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 20
Structure length24 ft (7.3 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,257 (2021)
Projected traffic2,257 by 2043
Trucks0%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Waconia Ave over Willow Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is Waconia Ave 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 April 2023.

How much traffic does Waconia Ave over Willow Creek carry?

About 2,257 vehicles per day (2021 count).

How long is Waconia Ave over Willow Creek?

The structure is 24 ft (7.3 m) long with a longest span of 12 ft (3.7 m).

Who owns Waconia Ave over Willow Creek?

It is owned by the City or Municipal Highway Agency.