US Bridges

Il 78 over Drainage Ditch

Fair

Jo Daviess County, Illinois · 2 MI N Carroll CO LN · Structure no. 043200400000000

Built
1992
33 years old
Condition
Fair
inspected October 2024
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
600
2023 count
Owner
State
State Highway Agency

About this bridge

Il 78 over Drainage Ditch is a concrete culvert carrying Il 78 over Drainage Ditch in Jo Daviess County, Illinois. It was built in 1992, so it is 33 years old, younger 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 600 vehicles a day, roughly 13% of them trucks, projected to reach 556 by 2046. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 16.8 mi (27 km).

CarriesIl 78
CrossesDrainage Ditch
Location2 MI N Carroll CO LN
RouteState Highway 78
Coordinates42.21564, -90.02176
Functional classRural Major Collector

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 inspectionOctober 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 rating66.5 US tons
Inventory rating39.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span11 ft (3.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic600 (2023)
Projected traffic556 by 2046
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 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 Il 78 over Drainage Ditch built?

It was built in 1992, making it 33 years old in 2025.

What condition is Il 78 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 October 2024.

How much traffic does Il 78 over Drainage Ditch carry?

About 600 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is Il 78 over Drainage Ditch?

The structure is 22 ft (6.7 m) long with a longest span of 11 ft (3.3 m).

Who owns Il 78 over Drainage Ditch?

It is owned by the State Highway Agency.