US Bridges

8th Avenue over Wanatee Creek

Fair

Linn County, Iowa · 083060400 · Structure no. 000000000504790

Built
2003
22 years old
Condition
Fair
inspected April 2022
Type
Culvert
Concrete Continuous
Length
31 ft
2 main spans
Daily traffic
510
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

8th Avenue over Wanatee Creek is a concrete continuous culvert carrying 8th Avenue over Wanatee Creek in Linn County, Iowa. It was built in 2003, so it is 22 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 510 vehicles a day, projected to reach 510 by 2043. The structure is 31 ft (9.4 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries8th Avenue
CrossesWanatee Creek
Location083060400
RouteCity Street 0
CountyLinn County
StateIowa
Coordinates42.03396, -91.55827
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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length31 ft (9.4 m)
Longest span14 ft (4.3 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic510 (2022)
Projected traffic510 by 2043
Trucks0%
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

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 8th Avenue over Wanatee Creek built?

It was built in 2003, making it 22 years old in 2025.

What condition is 8th Avenue over Wanatee 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 2022.

How much traffic does 8th Avenue over Wanatee Creek carry?

About 510 vehicles per day (2022 count).

How long is 8th Avenue over Wanatee Creek?

The structure is 31 ft (9.4 m) long with a longest span of 14 ft (4.3 m) and a deck 30 ft wide.

Who owns 8th Avenue over Wanatee Creek?

It is owned by the City or Municipal Highway Agency.