US Bridges

Il 78 over Drainage Ditch

Fair

Whiteside County, Illinois · 0.2 Mi. N. of US 30 · Structure no. 098202000000000

Built
1996
29 years old
Condition
Fair
inspected October 2024
Type
Culvert
Concrete
Length
32 ft
2 main spans
Daily traffic
1,050
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 Whiteside County, Illinois. It was built in 1996, so it is 29 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 1,050 vehicles a day, roughly 12% of them trucks, projected to reach 1,364 by 2046. The structure is 32 ft (9.8 m) long and 43 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

Open in Google Maps
CarriesIl 78
CrossesDrainage Ditch
Location0.2 Mi. N. of US 30
RouteState Highway 78
CountyWhiteside County
StateIllinois
Coordinates41.82449, -89.98798
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
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
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.5 US tons
Inventory rating34.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length32 ft (9.8 m)
Longest span15 ft (4.7 m)
Deck width43 ft (13.1 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,050 (2023)
Projected traffic1,364 by 2046
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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 1996, making it 29 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 1,050 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is Il 78 over Drainage Ditch?

The structure is 32 ft (9.8 m) long with a longest span of 15 ft (4.7 m) and a deck 43 ft wide.

Who owns Il 78 over Drainage Ditch?

It is owned by the State Highway Agency.