US Bridges

Ch 4 over Mill Creek

Good

Clark County, Illinois · .6 MI NW Walnut Prk · Structure no. 012328600000000

Built
1992
33 years old
Condition
Good
inspected February 2022
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
187 ft
4 main spans
Daily traffic
75
2021 count
Owner
County
County Highway Agency

About this bridge

Ch 4 over Mill Creek is a prestressed concrete box beam or girders - multiple carrying Ch 4 over Mill Creek in Clark County, Illinois. It was built in 1992, so it is 33 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 75 vehicles a day, roughly 7% of them trucks, projected to reach 76 by 2046. The structure is 187 ft (56.9 m) long and 27 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesCh 4
CrossesMill Creek
Location.6 MI NW Walnut Prk
RouteCounty Highway 0
Coordinates39.23774, -87.67595
Functional classRural Local

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 protection7 GoodSome minor problems.
Last inspectionFebruary 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans4
Design loadHS 20
Structure length187 ft (56.9 m)
Longest span80 ft (24.4 m)
Deck width27 ft (8.2 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2021)
Projected traffic76 by 2046
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Ch 4 over Mill Creek built?

It was built in 1992, making it 33 years old in 2025.

What condition is Ch 4 over Mill 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 2022.

How much traffic does Ch 4 over Mill Creek carry?

About 75 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is Ch 4 over Mill Creek?

The structure is 187 ft (56.9 m) long with a longest span of 80 ft (24.4 m) and a deck 27 ft wide.

Who owns Ch 4 over Mill Creek?

It is owned by the County Highway Agency.