US Bridges

Ill 100 over Michael Creek

Good

Calhoun County, Illinois · In Michael M.P. 5.3 · Structure no. 007002200000000

Built
1996
29 years old
Condition
Good
inspected February 2023
Type
Slab
Concrete Continuous
Length
75 ft
2 main spans
Daily traffic
1,350
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 100 over Michael Creek is a concrete continuous slab carrying Ill 100 over Michael Creek in Calhoun County, Illinois. It was built in 1996, so it is 29 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 1,350 vehicles a day, roughly 13% of them trucks, projected to reach 1,414 by 2046. The structure is 75 ft (22.9 m) long and 35 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesIll 100
CrossesMichael Creek
LocationIn Michael M.P. 5.3
RouteState Highway 100
Coordinates39.23602, -90.62221
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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
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 adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.1 US tons
Inventory rating43.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length75 ft (22.9 m)
Longest span37 ft (11.4 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,350 (2023)
Projected traffic1,414 by 2046
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 Ill 100 over Michael Creek built?

It was built in 1996, making it 29 years old in 2025.

What condition is Ill 100 over Michael 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 2023.

How much traffic does Ill 100 over Michael Creek carry?

About 1,350 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is Ill 100 over Michael Creek?

The structure is 75 ft (22.9 m) long with a longest span of 37 ft (11.4 m) and a deck 35 ft wide.

Who owns Ill 100 over Michael Creek?

It is owned by the State Highway Agency.