US Bridges

I-88 over Drainage Ditch

Fair

Rock Island County, Illinois · 2.5 M. Sw. Hillsdale · Structure no. 081200800000000

Built
1976
49 years old
Condition
Fair
inspected January 2024
Type
Culvert
Concrete
Length
31 ft
2 main spans
Daily traffic
13,500
2023 count
Owner
State
State Highway Agency

About this bridge

I-88 over Drainage Ditch is a concrete culvert carrying I-88 over Drainage Ditch in Rock Island County, Illinois. It was built in 1976, so it is 49 years old, older than the Illinois average of 45.3 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 13,500 vehicles a day, roughly 29% of them trucks, projected to reach 15,655 by 2046. The structure is 31 ft (9.3 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-88
CrossesDrainage Ditch
Location2.5 M. Sw. Hillsdale
RouteInterstate 88
CountyRock Island County
StateIllinois
Coordinates41.5819, -90.20862
Functional classRural 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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating87.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length31 ft (9.3 m)
Longest span15 ft (4.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,500 (2023)
Projected traffic15,655 by 2046
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-88 over Drainage Ditch built?

It was built in 1976, making it 49 years old in 2025.

What condition is I-88 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 January 2024.

How much traffic does I-88 over Drainage Ditch carry?

About 13,500 vehicles per day (2023 count), of which roughly 29% are trucks.

How long is I-88 over Drainage Ditch?

The structure is 31 ft (9.3 m) long with a longest span of 15 ft (4.5 m).

Who owns I-88 over Drainage Ditch?

It is owned by the State Highway Agency.