US Bridges

I-80 over Drainage Ditch

Fair

Scott County, Iowa · 3.9 Mi. E of Jct. I-74 · Structure no. 000000000047650

Built
1963
62 years old
Condition
Fair
inspected April 2024
Type
Culvert
Concrete Continuous
Length
33 ft
3 main spans
Daily traffic
34,600
2023 count
Owner
State
State Highway Agency

About this bridge

I-80 over Drainage Ditch is a concrete continuous culvert carrying I-80 over Drainage Ditch in Scott County, Iowa. It was built in 1963, so it is 62 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 34,600 vehicles a day, roughly 29% of them trucks, projected to reach 34,600 by 2043. The structure is 33 ft (10.1 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI-80
CrossesDrainage Ditch
Location3.9 Mi. E of Jct. I-74
RouteInterstate 80
StateIowa
Coordinates41.59726, -90.44932
Functional classUrban Principal Arterial - Interstate

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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating30.6 US tons
Inventory rating18.4 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34,600 (2023)
Projected traffic34,600 by 2043
Trucks29%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I-80 over Drainage Ditch built?

It was built in 1963, making it 62 years old in 2025.

What condition is I-80 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 April 2024.

How much traffic does I-80 over Drainage Ditch carry?

About 34,600 vehicles per day (2023 count), of which roughly 29% are trucks.

How long is I-80 over Drainage Ditch?

The structure is 33 ft (10.1 m) long with a longest span of 10 ft (3 m).

Who owns I-80 over Drainage Ditch?

It is owned by the State Highway Agency.