US Bridges

Il 78 / Main St. over Mauvaise Terre CR

Good

Morgan County, Illinois · .6M N Walnut-J"ville · Structure no. 069000500000000

Built
1927
98 years old, rebuilt 2008
Condition
Good
inspected August 2022
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
202 ft
4 main spans
Daily traffic
2,800
2023 count
Owner
State
State Highway Agency

About this bridge

Il 78 / Main St. over Mauvaise Terre CR is a prestressed concrete box beam or girders - multiple carrying Il 78 / Main St. over Mauvaise Terre CR in Morgan County, Illinois. It was built in 1927 and reconstructed in 2008, so it is 98 years old, older 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 2,800 vehicles a day, roughly 9% of them trucks, projected to reach 3,030 by 2046. The structure is 202 ft (61.7 m) long and 33 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

Location

Open in Google Maps
CarriesIl 78 / Main St.
CrossesMauvaise Terre CR
Location.6M N Walnut-J"ville
RouteState Highway 78
CountyMorgan County
StateIllinois
Coordinates39.75467, -90.22909
Functional classUrban 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.6 US tons
Inventory rating38.9 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans4
Design loadHS 20
Structure length202 ft (61.7 m)
Longest span50 ft (15.2 m)
Deck width33 ft (10.1 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,800 (2023)
Projected traffic3,030 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 / Main St. over Mauvaise Terre CR built?

It was built in 1927, making it 98 years old in 2025. It was reconstructed in 2008.

What condition is Il 78 / Main St. over Mauvaise Terre CR 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 August 2022.

How much traffic does Il 78 / Main St. over Mauvaise Terre CR carry?

About 2,800 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is Il 78 / Main St. over Mauvaise Terre CR?

The structure is 202 ft (61.7 m) long with a longest span of 50 ft (15.2 m) and a deck 33 ft wide.

Who owns Il 78 / Main St. over Mauvaise Terre CR?

It is owned by the State Highway Agency.