US Bridges

US 45 SB (la Grang over Cal Sag Channel

Fair

Cook County, Illinois · 0.2 M N Il 83 · Structure no. 016034300000000

Built
1967
58 years old, rebuilt 2000
Condition
Fair
inspected June 2024
Type
Truss - Thru
Steel
Length
445 ft
1 main span
Daily traffic
33,800
2023 count
Owner
State
State Highway Agency

About this bridge

US 45 SB (la Grang over Cal Sag Channel is a steel truss - thru carrying US 45 SB (la Grang over Cal Sag Channel in Cook County, Illinois. It was built in 1967 and reconstructed in 2000, so it is 58 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 33,800 vehicles a day, roughly 4% of them trucks, projected to reach 19,190 by 2046. The structure is 445 ft (135.6 m) long and 34 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesUS 45 SB (la Grang
CrossesCal Sag Channel
Location0.2 M N Il 83
RouteU.S. Route 45
CountyCook County
StateIllinois
Coordinates41.68652, -87.85554
Functional classUrban Other Principal 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionJune 2024
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.7 US tons
Inventory rating33.6 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+5 approach)
Design loadHS 20
Structure length445 ft (135.6 m)
Longest span290 ft (88.3 m)
Deck width34 ft (10.4 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic33,800 (2023)
Projected traffic19,190 by 2046
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$1.3 million
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was US 45 SB (la Grang over Cal Sag Channel built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 2000.

What condition is US 45 SB (la Grang 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 June 2024.

How much traffic does US 45 SB (la Grang over Cal Sag Channel carry?

About 33,800 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is US 45 SB (la Grang over Cal Sag Channel?

The structure is 445 ft (135.6 m) long with a longest span of 290 ft (88.3 m) and a deck 34 ft wide.

Who owns US 45 SB (la Grang over Cal Sag Channel?

It is owned by the State Highway Agency.