US Bridges

Ia 163 over Little Muchikinock Creek

Fair

Mahaska County, Iowa · 2.4 Mi. E of Jct. Ia 92 · Structure no. 000000000606845

Built
1995
30 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete Continuous
Length
38 ft
2 main spans
Daily traffic
7,800
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 163 over Little Muchikinock Creek is a concrete continuous culvert carrying Ia 163 over Little Muchikinock Creek in Mahaska County, Iowa. It was built in 1995, so it is 30 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 7,800 vehicles a day, roughly 22% of them trucks, projected to reach 7,800 by 2044. The structure is 38 ft (11.6 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesIa 163
CrossesLittle Muchikinock Creek
Location2.4 Mi. E of Jct. Ia 92
RouteState Highway 163
CountyMahaska County
StateIowa
Coordinates41.27178, -92.65854
Functional classUrban Other Principal Arterial

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length38 ft (11.6 m)
Longest span18 ft (5.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,800 (2022)
Projected traffic7,800 by 2044
Trucks22%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 163 over Little Muchikinock Creek built?

It was built in 1995, making it 30 years old in 2025.

What condition is Ia 163 over Little Muchikinock 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 September 2024.

How much traffic does Ia 163 over Little Muchikinock Creek carry?

About 7,800 vehicles per day (2022 count), of which roughly 22% are trucks.

How long is Ia 163 over Little Muchikinock Creek?

The structure is 38 ft (11.6 m) long with a longest span of 18 ft (5.5 m).

Who owns Ia 163 over Little Muchikinock Creek?

It is owned by the State Highway Agency.