Ia 22 over Drainage Ditch

Good

Muscatine County, Iowa · 1.0 Mi. E of Jct. SR Y26 · Structure no. 000000000605420

Built: 1984; 41 years old
Condition: Good; inspected June 2024
Type: Culvert; Concrete Continuous
Length: 21 ft; 2 main spans
Daily traffic: 1,730; 2022 count
Owner: State; State Highway Agency

About this bridge

Ia 22 over Drainage Ditch is a concrete continuous culvert carrying Ia 22 over Drainage Ditch in Muscatine 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 1,730 vehicles a day, roughly 16% of them trucks, projected to reach 1,730 by 2044. The structure is 21 ft (6.4 m) long and 80 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesIa 22

CrossesDrainage Ditch

Location1.0 Mi. E of Jct. SR Y26

RouteState Highway 22

CountyMuscatine County

StateIowa

Coordinates41.44119, -90.89381

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
Channel and channel protection	7 Good	Some minor problems.
Culvert	7 Good	Some minor problems.

Last inspectionJune 2024

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation6: Equal to present minimum criteria

Deck geometry9: Superior to present desirable criteria

Waterway adequacy6: Equal to present minimum criteria

Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is

Operating rating36 US tons

Inventory rating27.9 US tons

Structure

Structure typeCulvert

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans2

Design loadHS 20

Structure length21 ft (6.4 m)

Longest span10 ft (3 m)

Deck width80 ft (24.4 m)

Roadway width78 ft (23.8 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,730 (2022)

Projected traffic1,730 by 2044

Trucks16%

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 22 over Drainage Ditch built?

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

What condition is Ia 22 over Drainage Ditch 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 June 2024.

How much traffic does Ia 22 over Drainage Ditch carry?

About 1,730 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is Ia 22 over Drainage Ditch?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m) and a deck 80 ft wide.

Who owns Ia 22 over Drainage Ditch?

It is owned by the State Highway Agency.