US Bridges

Il 78 over Fork Indian Creek

Good

Morgan County, Illinois · 2.8 MI S Cass CO Lin · Structure no. 069050300000000

Built
2004
21 years old
Condition
Good
inspected February 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
62 ft
1 main span
Daily traffic
2,100
2023 count
Owner
State
State Highway Agency

About this bridge

Il 78 over Fork Indian Creek is a prestressed concrete stringer/multi-beam or girder carrying Il 78 over Fork Indian Creek in Morgan County, Illinois. It was built in 2004, so it is 21 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 2,100 vehicles a day, roughly 9% of them trucks, projected to reach 2,273 by 2046. The structure is 62 ft (18.8 m) long and 35 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

CarriesIl 78
CrossesFork Indian Creek
Location2.8 MI S Cass CO Lin
RouteState Highway 78
Coordinates39.83235, -90.22096
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2025
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.5 US tons
Inventory rating54.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length62 ft (18.8 m)
Longest span59 ft (18 m)
Deck width35 ft (10.6 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,100 (2023)
Projected traffic2,273 by 2046
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.7 mi (35 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 Fork Indian Creek built?

It was built in 2004, making it 21 years old in 2025.

What condition is Il 78 over Fork Indian Creek 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 February 2025.

How much traffic does Il 78 over Fork Indian Creek carry?

About 2,100 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is Il 78 over Fork Indian Creek?

The structure is 62 ft (18.8 m) long with a longest span of 59 ft (18 m) and a deck 35 ft wide.

Who owns Il 78 over Fork Indian Creek?

It is owned by the State Highway Agency.