US Bridges

Ia 10 over Drainage Ditch

Fair

Clay County, Iowa · 3.2 Mi. W of Jct. SR M36 · Structure no. 000000000020420

Built
1932
93 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete Continuous
Length
43 ft
3 main spans
Daily traffic
700
2023 count
Owner
State
State Highway Agency

About this bridge

Ia 10 over Drainage Ditch is a concrete continuous culvert carrying Ia 10 over Drainage Ditch in Clay County, Iowa. It was built in 1932, so it is 93 years old, older 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 700 vehicles a day, roughly 20% of them trucks, projected to reach 700 by 2043. The structure is 43 ft (13 m) long. If it were closed, the detour would be 5 mi (8 km).

CarriesIa 10
CrossesDrainage Ditch
Location3.2 Mi. W of Jct. SR M36
RouteState Highway 10
StateIowa
Coordinates42.92243, -95.31192
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36 US tons
Inventory rating28.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadH 15
Structure length43 ft (13 m)
Longest span13 ft (4.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic700 (2023)
Projected traffic700 by 2043
Trucks20%
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 10 over Drainage Ditch built?

It was built in 1932, making it 93 years old in 2025.

What condition is Ia 10 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 September 2024.

How much traffic does Ia 10 over Drainage Ditch carry?

About 700 vehicles per day (2023 count), of which roughly 20% are trucks.

How long is Ia 10 over Drainage Ditch?

The structure is 43 ft (13 m) long with a longest span of 13 ft (4.1 m).

Who owns Ia 10 over Drainage Ditch?

It is owned by the State Highway Agency.