US Bridges

218th Ave over Johnny Creek

Good

Louisa County, Iowa · 074040404 · Structure no. 000000000224021

Built
2020
5 years old
Condition
Good
inspected May 2024
Type
Culvert
Steel
Length
20 ft
1 main span
Daily traffic
180
2022 count
Owner
County
County Highway Agency

About this bridge

218th Ave over Johnny Creek is a steel culvert carrying 218th Ave over Johnny Creek in Louisa County, Iowa. It was built in 2020, so it is 5 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 180 vehicles a day, projected to reach 180 by 2044. The structure is 20 ft (6.1 m) long. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
Carries218th Ave
CrossesJohnny Creek
Location074040404
RouteCounty Highway 0
CountyLouisa County
StateIowa
Coordinates41.2391, -91.34632
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating43.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHL 93
Structure length20 ft (6.1 m)
Longest span20 ft (6.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic180 (2022)
Projected traffic180 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 218th Ave over Johnny Creek built?

It was built in 2020, making it 5 years old in 2025.

What condition is 218th Ave over Johnny Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2024.

How much traffic does 218th Ave over Johnny Creek carry?

About 180 vehicles per day (2022 count).

How long is 218th Ave over Johnny Creek?

The structure is 20 ft (6.1 m) long with a longest span of 20 ft (6.1 m).

Who owns 218th Ave over Johnny Creek?

It is owned by the County Highway Agency.