US Bridges

Il 23 over Mole Creek

Good

Livingston County, Illinois · 5.68 MI S of Il 17 · Structure no. 053018300000000

Built
2007
18 years old
Condition
Good
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
108 ft
3 main spans
Daily traffic
1,550
2023 count
Owner
State
State Highway Agency

About this bridge

Il 23 over Mole Creek is a steel continuous stringer/multi-beam or girder carrying Il 23 over Mole Creek in Livingston County, Illinois. It was built in 2007, so it is 18 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 1,550 vehicles a day, roughly 8% of them trucks, projected to reach 1,465 by 2046. The structure is 108 ft (32.8 m) long and 35 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesIl 23
CrossesMole Creek
Location5.68 MI S of Il 17
RouteState Highway 23
Coordinates40.99612, -88.81269
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 protection7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating86.8 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadHS 20
Structure length108 ft (32.8 m)
Longest span38 ft (11.6 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,550 (2023)
Projected traffic1,465 by 2046
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 23 over Mole Creek built?

It was built in 2007, making it 18 years old in 2025.

What condition is Il 23 over Mole 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 Il 23 over Mole Creek carry?

About 1,550 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is Il 23 over Mole Creek?

The structure is 108 ft (32.8 m) long with a longest span of 38 ft (11.6 m) and a deck 35 ft wide.

Who owns Il 23 over Mole Creek?

It is owned by the State Highway Agency.