US Bridges

230th ST over Kilson Creek

Good

Butler County, Iowa · 230th 3250 E Jackson Ave · Structure no. 000000000088841

Built
2023
2 years old
Condition
Good
inspected September 2023
Type
Tee Beam
Prestressed Concrete
Length
56 ft
1 main span
Daily traffic
15
2022 count
Owner
County
County Highway Agency

About this bridge

230th ST over Kilson Creek is a prestressed concrete tee beam carrying 230th ST over Kilson Creek in Butler County, Iowa. It was built in 2023, so it is 2 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 15 vehicles a day, projected to reach 15 by 2044. The structure is 56 ft (17.1 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
Carries230th ST
CrossesKilson Creek
Location230th 3250 E Jackson Ave
RouteCounty Highway 0
CountyButler County
StateIowa
Coordinates42.75948, -92.85968
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 19 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating33 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length56 ft (17.1 m)
Longest span55 ft (16.8 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2022)
Projected traffic15 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesOther
Detour if closed3.1 mi (5 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$265 million (2023 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was 230th ST over Kilson Creek built?

It was built in 2023, making it 2 years old in 2025.

What condition is 230th ST over Kilson 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 September 2023.

How much traffic does 230th ST over Kilson Creek carry?

About 15 vehicles per day (2022 count).

How long is 230th ST over Kilson Creek?

The structure is 56 ft (17.1 m) long with a longest span of 55 ft (16.8 m) and a deck 28 ft wide.

Who owns 230th ST over Kilson Creek?

It is owned by the County Highway Agency.