US Bridges

Il 78 over Jobs Creek

Fair

Cass County, Illinois · 3.9M N Il 125 · Structure no. 009000900000000

Built
1931
94 years old
Condition
Fair
inspected June 2024
Type
Tee Beam
Concrete
Length
43 ft
1 main span
Daily traffic
1,500
2023 count
Owner
State
State Highway Agency

About this bridge

Il 78 over Jobs Creek is a concrete tee beam carrying Il 78 over Jobs Creek in Cass County, Illinois. It was built in 1931, so it is 94 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 1,500 vehicles a day, roughly 10% of them trucks, projected to reach 1,667 by 2046. The structure is 43 ft (13.1 m) long and 59 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

Location

Open in Google Maps
CarriesIl 78
CrossesJobs Creek
Location3.9M N Il 125
RouteState Highway 78
CountyCass County
StateIllinois
Coordinates40.00378, -90.19072
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating63.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length43 ft (13.1 m)
Longest span41 ft (12.6 m)
Deck width59 ft (18 m)
Roadway width57 ft (17.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,500 (2023)
Projected traffic1,667 by 2046
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$170,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Il 78 over Jobs Creek built?

It was built in 1931, making it 94 years old in 2025.

What condition is Il 78 over Jobs Creek 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 June 2024.

How much traffic does Il 78 over Jobs Creek carry?

About 1,500 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Il 78 over Jobs Creek?

The structure is 43 ft (13.1 m) long with a longest span of 41 ft (12.6 m) and a deck 59 ft wide.

Who owns Il 78 over Jobs Creek?

It is owned by the State Highway Agency.