US Bridges

Il 1 (halsted ST over Cal Union Ditch

Poor

Cook County, Illinois · @ 161st .25 M S US6 · Structure no. 016252500000000

Built
1984
41 years old
Condition
Poor
inspected August 2024
Type
Slab
Concrete
Length
26 ft
1 main span
Daily traffic
19,200
2023 count
Owner
State
State Highway Agency

About this bridge

Il 1 (halsted ST over Cal Union Ditch is a concrete slab carrying Il 1 (halsted ST over Cal Union Ditch in Cook County, Illinois. It was built in 1984, so it is 41 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 19,200 vehicles a day, roughly 6% of them trucks, projected to reach 19,392 by 2046. The structure is 26 ft (7.9 m) long and 76 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesIl 1 (halsted ST
CrossesCal Union Ditch
Location@ 161st .25 M S US6
RouteState Highway 1
Coordinates41.5971, -87.63642
Functional classUrban Other Principal Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating34.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span25 ft (7.6 m)
Deck width76 ft (23.2 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,200 (2023)
Projected traffic19,392 by 2046
Trucks6%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$197,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Il 1 (halsted ST over Cal Union Ditch built?

It was built in 1984, making it 41 years old in 2025.

What condition is Il 1 (halsted ST over Cal Union Ditch in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2024.

How much traffic does Il 1 (halsted ST over Cal Union Ditch carry?

About 19,200 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is Il 1 (halsted ST over Cal Union Ditch?

The structure is 26 ft (7.9 m) long with a longest span of 25 ft (7.6 m) and a deck 76 ft wide.

Who owns Il 1 (halsted ST over Cal Union Ditch?

It is owned by the State Highway Agency.