US Bridges

Chicago RD over Thorn Creek Trib

Good

Cook County, Illinois · .03 M N Il 1 Cutoff · Structure no. 016230500000000

Built
2020
5 years old
Condition
Good
inspected April 2023
Type
Culvert
Concrete Continuous
Length
39 ft
3 main spans
Daily traffic
5,000
2022 count
Owner
State
State Highway Agency

About this bridge

Chicago RD over Thorn Creek Trib is a concrete continuous culvert carrying Chicago RD over Thorn Creek Trib in Cook County, Illinois. It was built in 2020, so it is 5 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 5,000 vehicles a day, roughly 8% of them trucks, projected to reach 5,505 by 2046. The structure is 39 ft (11.8 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesChicago RD
CrossesThorn Creek Trib
Location.03 M N Il 1 Cutoff
CountyCook County
StateIllinois
Coordinates41.51565, -87.64281
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation8: Equal to present desirable 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 rating79.3 US tons
Inventory rating61.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 25 or greater
Structure length39 ft (11.8 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width52 ft (15.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,000 (2022)
Projected traffic5,505 by 2046
Trucks8%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 Chicago RD over Thorn Creek Trib built?

It was built in 2020, making it 5 years old in 2025.

What condition is Chicago RD over Thorn Creek Trib 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 April 2023.

How much traffic does Chicago RD over Thorn Creek Trib carry?

About 5,000 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is Chicago RD over Thorn Creek Trib?

The structure is 39 ft (11.8 m) long with a longest span of 12 ft (3.7 m).

Who owns Chicago RD over Thorn Creek Trib?

It is owned by the State Highway Agency.