US Bridges

I-55 over Drainage Ditch

Fair

Logan County, Illinois · .5M W BL55 NE Lincln · Structure no. 054202500000000

Built
1974
51 years old
Condition
Fair
inspected September 2023
Type
Culvert
Concrete
Length
23 ft
2 main spans
Daily traffic
21,500
2023 count
Owner
State
State Highway Agency

About this bridge

I-55 over Drainage Ditch is a concrete culvert carrying I-55 over Drainage Ditch in Logan County, Illinois. It was built in 1974, so it is 51 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 21,500 vehicles a day, roughly 33% of them trucks, projected to reach 22,995 by 2046. The structure is 23 ft (7.1 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-55
CrossesDrainage Ditch
Location.5M W BL55 NE Lincln
RouteInterstate 55
CountyLogan County
StateIllinois
Coordinates40.18483, -89.32637
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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating79.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length23 ft (7.1 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 traffic21,500 (2023)
Projected traffic22,995 by 2046
Trucks33%
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-55 over Drainage Ditch built?

It was built in 1974, making it 51 years old in 2025.

What condition is I-55 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 2023.

How much traffic does I-55 over Drainage Ditch carry?

About 21,500 vehicles per day (2023 count), of which roughly 33% are trucks.

How long is I-55 over Drainage Ditch?

The structure is 23 ft (7.1 m) long with a longest span of 10 ft (3 m).

Who owns I-55 over Drainage Ditch?

It is owned by the State Highway Agency.