US Bridges

Il 176 over US 41

Fair

Lake County, Illinois · Lake Bluff · Structure no. 049013100000000

Built
1980
45 years old, rebuilt 2010
Condition
Fair
inspected November 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
84 ft
2 main spans
Daily traffic
16,900
2023 count
Owner
State
State Highway Agency

About this bridge

Il 176 over US 41 is a prestressed concrete box beam or girders - multiple carrying Il 176 over US 41 in Lake County, Illinois. It was built in 1980 and reconstructed in 2010, so it is 45 years old, younger 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 16,900 vehicles a day, roughly 2% of them trucks, projected to reach 15,857 by 2046. The structure is 84 ft (25.6 m) long and 52 ft wide.

Location

Open in Google Maps
CarriesIl 176
CrossesUS 41
LocationLake Bluff
RouteState Highway 176
CountyLake County
StateIllinois
Coordinates42.2796, -87.87109
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating62.2 US tons
Inventory rating47.8 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length84 ft (25.6 m)
Longest span42 ft (12.8 m)
Deck width52 ft (15.8 m)
Roadway width44 ft (13.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,900 (2023)
Projected traffic15,857 by 2046
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Il 176 over US 41 built?

It was built in 1980, making it 45 years old in 2025. It was reconstructed in 2010.

What condition is Il 176 over US 41 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 November 2023.

How much traffic does Il 176 over US 41 carry?

About 16,900 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Il 176 over US 41?

The structure is 84 ft (25.6 m) long with a longest span of 42 ft (12.8 m) and a deck 52 ft wide.

Who owns Il 176 over US 41?

It is owned by the State Highway Agency.