US Bridges

Ia 23 over Tributary of Cedar Creek

Good

Mahaska County, Iowa · 0.8 M N of County RD T67 · Structure no. 000000000034871

Built
2023
2 years old
Condition
Good
inspected December 2023
Type
Culvert
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
2,350
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 23 over Tributary of Cedar Creek is a concrete continuous culvert carrying Ia 23 over Tributary of Cedar Creek in Mahaska 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 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 2,350 vehicles a day, roughly 10% of them trucks, projected to reach 2,350 by 2043. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesIa 23
CrossesTributary of Cedar Creek
Location0.8 M N of County RD T67
RouteState Highway 23
CountyMahaska County
StateIowa
Coordinates41.22189, -92.53765
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.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.2 US tons
Inventory rating41.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHL 93
Structure length25 ft (7.6 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,350 (2022)
Projected traffic2,350 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 23 over Tributary of Cedar Creek built?

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

What condition is Ia 23 over Tributary of Cedar 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 December 2023.

How much traffic does Ia 23 over Tributary of Cedar Creek carry?

About 2,350 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is Ia 23 over Tributary of Cedar Creek?

The structure is 25 ft (7.6 m) long with a longest span of 12 ft (3.7 m).

Who owns Ia 23 over Tributary of Cedar Creek?

It is owned by the State Highway Agency.