US Bridges

104th Ave over Cal Sag Channel

Fair

Cook County, Illinois · 0.5 M S 107th P19 · Structure no. 016301800000000

Built
1964
61 years old, rebuilt 2014
Condition
Fair
inspected March 2023
Type
Truss - Thru
Steel
Length
406 ft
1 main span
Daily traffic
2,400
2022 count
Owner
County
County Highway Agency

About this bridge

104th Ave over Cal Sag Channel is a steel truss - thru carrying 104th Ave over Cal Sag Channel in Cook County, Illinois. It was built in 1964 and reconstructed in 2014, so it is 61 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 2,400 vehicles a day, roughly 3% of them trucks, projected to reach 9,797 by 2046. The structure is 406 ft (123.7 m) long and 45 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries104th Ave
CrossesCal Sag Channel
Location0.5 M S 107th P19
CountyCook County
StateIllinois
Coordinates41.68823, -87.87485
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.8 US tons
Inventory rating34 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+4 approach)
Design loadH 20
Structure length406 ft (123.7 m)
Longest span290 ft (88.4 m)
Deck width45 ft (13.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,400 (2022)
Projected traffic9,797 by 2046
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was 104th Ave over Cal Sag Channel built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 2014.

What condition is 104th Ave over Cal Sag Channel in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2023.

How much traffic does 104th Ave over Cal Sag Channel carry?

About 2,400 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 104th Ave over Cal Sag Channel?

The structure is 406 ft (123.7 m) long with a longest span of 290 ft (88.4 m) and a deck 45 ft wide.

Who owns 104th Ave over Cal Sag Channel?

It is owned by the County Highway Agency.