US Bridges

Il 100 over Mauvaise Terre CR

Fair

Scott County, Illinois · 1.9M N I-72/S Bluffs · Structure no. 086050000000000

Built
2001
24 years old
Condition
Fair
inspected December 2022
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
295 ft
4 main spans
Daily traffic
1,350
2023 count
Owner
State
State Highway Agency

About this bridge

Il 100 over Mauvaise Terre CR is a steel continuous stringer/multi-beam or girder carrying Il 100 over Mauvaise Terre CR in Scott County, Illinois. It was built in 2001, so it is 24 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 1,350 vehicles a day, roughly 16% of them trucks, projected to reach 1,414 by 2046. The structure is 295 ft (89.9 m) long and 35 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesIl 100
CrossesMauvaise Terre CR
Location1.9M N I-72/S Bluffs
RouteState Highway 100
CountyScott County
StateIllinois
Coordinates39.71088, -90.56859
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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.1 US tons
Inventory rating49.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length295 ft (89.9 m)
Longest span76 ft (23.3 m)
Deck width35 ft (10.6 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,350 (2023)
Projected traffic1,414 by 2046
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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 100 over Mauvaise Terre CR built?

It was built in 2001, making it 24 years old in 2025.

What condition is Il 100 over Mauvaise Terre CR 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 December 2022.

How much traffic does Il 100 over Mauvaise Terre CR carry?

About 1,350 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is Il 100 over Mauvaise Terre CR?

The structure is 295 ft (89.9 m) long with a longest span of 76 ft (23.3 m) and a deck 35 ft wide.

Who owns Il 100 over Mauvaise Terre CR?

It is owned by the State Highway Agency.