US Bridges

Il 23 over Drainage Ditch

Fair

DeKalb County, Illinois · 2.4 MI S of I88 · Structure no. 019000700000000

Built
1926
99 years old, rebuilt 2006
Condition
Fair
inspected March 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
56 ft
2 main spans
Daily traffic
3,950
2023 count
Owner
State
State Highway Agency

About this bridge

Il 23 over Drainage Ditch is a prestressed concrete box beam or girders - multiple carrying Il 23 over Drainage Ditch in DeKalb County, Illinois. It was built in 1926 and reconstructed in 2006, so it is 99 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 5 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 3,950 vehicles a day, roughly 12% of them trucks, projected to reach 5,376 by 2046. The structure is 56 ft (17 m) long and 44 ft wide. If it were closed, the detour would be 39.8 mi (64 km).

Location

Open in Google Maps
CarriesIl 23
CrossesDrainage Ditch
Location2.4 MI S of I88
RouteState Highway 23
CountyDeKalb County
StateIllinois
Coordinates41.86894, -88.75379
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating87.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length56 ft (17 m)
Longest span28 ft (8.5 m)
Deck width44 ft (13.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,950 (2023)
Projected traffic5,376 by 2046
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed39.8 mi (64 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$275,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Il 23 over Drainage Ditch built?

It was built in 1926, making it 99 years old in 2025. It was reconstructed in 2006.

What condition is Il 23 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 March 2023.

How much traffic does Il 23 over Drainage Ditch carry?

About 3,950 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is Il 23 over Drainage Ditch?

The structure is 56 ft (17 m) long with a longest span of 28 ft (8.5 m) and a deck 44 ft wide.

Who owns Il 23 over Drainage Ditch?

It is owned by the State Highway Agency.