US Bridges

Ia 22 over Drainage Ditch

Fair

Washington County, Iowa · 0.5 Mi. W of Jct. Ia 1 · Structure no. 000000000051721

Built
1994
31 years old
Condition
Fair
inspected November 2022
Type
Culvert
Concrete Continuous
Length
23 ft
2 main spans
Daily traffic
3,330
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 Washington County, Iowa. It was built in 1994, so it is 31 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 3,330 vehicles a day, roughly 8% of them trucks, projected to reach 3,330 by 2042. The structure is 23 ft (7 m) long and 86 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

Location

Open in Google Maps
CarriesIa 22
CrossesDrainage Ditch
Location0.5 Mi. W of Jct. Ia 1
RouteState Highway 22
CountyWashington County
StateIowa
Coordinates41.48589, -91.72405
Functional classRural Minor 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 inspectionNovember 2022
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53 US tons
Inventory rating31.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length23 ft (7 m)
Longest span10 ft (3 m)
Deck width86 ft (26.2 m)
Roadway width84 ft (25.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,330 (2022)
Projected traffic3,330 by 2042
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 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 1994, making it 31 years old in 2025.

What condition is Ia 22 over Drainage Ditch 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 November 2022.

How much traffic does Ia 22 over Drainage Ditch carry?

About 3,330 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is Ia 22 over Drainage Ditch?

The structure is 23 ft (7 m) long with a longest span of 10 ft (3 m) and a deck 86 ft wide.

Who owns Ia 22 over Drainage Ditch?

It is owned by the State Highway Agency.