US Bridges

Il 78 over Stream

Good

Carroll County, Illinois · 2 MI S of Jo Daviess · Structure no. 008201300000000

Built
1993
32 years old
Condition
Good
inspected May 2022
Type
Culvert
Concrete
Length
32 ft
3 main spans
Daily traffic
625
2023 count
Owner
State
State Highway Agency

About this bridge

Il 78 over Stream is a concrete culvert carrying Il 78 over Stream in Carroll County, Illinois. It was built in 1993, so it is 32 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 625 vehicles a day, roughly 19% of them trucks, projected to reach 657 by 2046. The structure is 32 ft (9.8 m) long. If it were closed, the detour would be 19.9 mi (32 km).

CarriesIl 78
CrossesStream
Location2 MI S of Jo Daviess
RouteState Highway 78
Coordinates42.17436, -89.98479
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionMay 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.7 US tons
Inventory rating39.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20 + Mod
Structure length32 ft (9.8 m)
Longest span10 ft (3.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic625 (2023)
Projected traffic657 by 2046
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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 Stream built?

It was built in 1993, making it 32 years old in 2025.

What condition is Il 78 over Stream in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2022.

How much traffic does Il 78 over Stream carry?

About 625 vehicles per day (2023 count), of which roughly 19% are trucks.

How long is Il 78 over Stream?

The structure is 32 ft (9.8 m) long with a longest span of 10 ft (3.2 m).

Who owns Il 78 over Stream?

It is owned by the State Highway Agency.