US Bridges

230th Avenue over Barber Creek

Good

Clinton County, Iowa · 081E32902 · Structure no. 000000000122181

Built
2010
15 years old
Condition
Good
inspected February 2021
Type
Slab
Concrete Continuous
Length
142 ft
3 main spans
Daily traffic
410
2022 count
Owner
County
County Highway Agency

About this bridge

230th Avenue over Barber Creek is a concrete continuous slab carrying 230th Avenue over Barber Creek in Clinton County, Iowa. It was built in 2010, so it is 15 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 410 vehicles a day, roughly 7% of them trucks, projected to reach 410 by 2043. The structure is 142 ft (43.3 m) long and 33 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Carries230th Avenue
CrossesBarber Creek
Location081E32902
RouteCounty Highway 0
StateIowa
Coordinates41.7878, -90.64592
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionFebruary 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating60.4 US tons
Inventory rating46.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length142 ft (43.3 m)
Longest span55 ft (16.8 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic410 (2022)
Projected traffic410 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 230th Avenue over Barber Creek built?

It was built in 2010, making it 15 years old in 2025.

What condition is 230th Avenue over Barber 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 February 2021.

How much traffic does 230th Avenue over Barber Creek carry?

About 410 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is 230th Avenue over Barber Creek?

The structure is 142 ft (43.3 m) long with a longest span of 55 ft (16.8 m) and a deck 33 ft wide.

Who owns 230th Avenue over Barber Creek?

It is owned by the County Highway Agency.