US Bridges

127th ST over Cal Sag Channel

PoorPosted for load

Cook County, Illinois · 0.2 M E Il 83 · Structure no. 016057000000000

Built
1968
57 years old, rebuilt 2024
Condition
Poor
inspected May 2024
Type
Truss - Thru
Steel
Length
610 ft
1 main span
Daily traffic
19,100
2021 count
Owner
State
State Highway Agency

About this bridge

127th ST over Cal Sag Channel is a steel truss - thru carrying 127th ST over Cal Sag Channel in Cook County, Illinois. It was built in 1968 and reconstructed in 2024, so it is 57 years old, older 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. Its operating status is: posted for load restriction.

It carries about 19,100 vehicles a day, roughly 8% of them trucks, projected to reach 19,291 by 2046. The structure is 610 ft (186 m) long and 74 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries127th ST
CrossesCal Sag Channel
Location0.2 M E Il 83
RouteState Highway 83
Coordinates41.66147, -87.75097
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.6 US tons
Inventory rating38.9 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+4 approach)
Design loadHS 20
Structure length610 ft (186 m)
Longest span396 ft (120.7 m)
Deck width74 ft (22.6 m)
Roadway width53 ft (16.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,100 (2021)
Projected traffic19,291 by 2046
Trucks8%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$8.1 million
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was 127th ST over Cal Sag Channel built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 2024.

What condition is 127th ST over Cal Sag Channel 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 May 2024.

How much traffic does 127th ST over Cal Sag Channel carry?

About 19,100 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is 127th ST over Cal Sag Channel?

The structure is 610 ft (186 m) long with a longest span of 396 ft (120.7 m) and a deck 74 ft wide.

Who owns 127th ST over Cal Sag Channel?

It is owned by the State Highway Agency.