Ia 14 over Johnson Creek

Good

Butler County, Iowa · 1.8 Mi. S of SR C-55 · Structure no. 000000000016591

Built: 1984; 41 years old
Condition: Good; inspected April 2023
Type: Slab; Concrete Continuous
Length: 142 ft; 4 main spans
Daily traffic: 1,280; 2022 count
Owner: State; State Highway Agency

About this bridge

Ia 14 over Johnson Creek is a concrete continuous slab carrying Ia 14 over Johnson Creek in Butler County, Iowa. It was built in 1984, so it is 41 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,280 vehicles a day, roughly 11% of them trucks, projected to reach 1,280 by 2042. The structure is 142 ft (43.3 m) long and 43 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps

CarriesIa 14

CrossesJohnson Creek

Location1.8 Mi. S of SR C-55

RouteState Highway 14

CountyButler County

StateIowa

Coordinates42.60281, -92.79053

Functional classRural Minor Arterial

Condition and inspection

Good

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

Component	Rating	Meaning
Deck	7 Good	Some minor problems.
Superstructure	7 Good	Some minor problems.
Substructure	7 Good	Some minor problems.
Channel and channel protection	6 Satisfactory	Structural elements show some minor deterioration.

Last inspectionApril 2023

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour within limits of footing or piles

Structural evaluation7: Better than present minimum criteria

Deck geometry7: Better than present minimum criteria

Waterway adequacy6: Equal to present minimum criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating99.8 US tons

Inventory rating63.4 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans4

Design loadHS 20

Structure length142 ft (43.3 m)

Longest span39 ft (11.9 m)

Deck width43 ft (13.1 m)

Roadway width40 ft (12.3 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,280 (2022)

Projected traffic1,280 by 2042

Trucks11%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed9.9 mi (16 km)

TollOn a free road

National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency

Maintained byState 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 Ia 14 over Johnson Creek built?

It was built in 1984, making it 41 years old in 2025.

What condition is Ia 14 over Johnson 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 April 2023.

How much traffic does Ia 14 over Johnson Creek carry?

About 1,280 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is Ia 14 over Johnson Creek?

The structure is 142 ft (43.3 m) long with a longest span of 39 ft (11.9 m) and a deck 43 ft wide.

Who owns Ia 14 over Johnson Creek?

It is owned by the State Highway Agency.