US Bridges

US 45 & Il 21 over Indian Creek

Fair

Lake County, Illinois · 0.01 M N of Il 22 · Structure no. 049016600000000

Built
1990
35 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete Continuous
Length
89 ft
3 main spans
Daily traffic
25,100
2023 count
Owner
State
State Highway Agency

About this bridge

US 45 & Il 21 over Indian Creek is a concrete continuous slab carrying US 45 & Il 21 over Indian Creek in Lake County, Illinois. It was built in 1990, so it is 35 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 25,100 vehicles a day, roughly 5% of them trucks, projected to reach 21,816 by 2046. The structure is 89 ft (27.1 m) long and 76 ft wide.

Location

Open in Google Maps
CarriesUS 45 & Il 21
CrossesIndian Creek
Location0.01 M N of Il 22
RouteU.S. Route 45
CountyLake County
StateIllinois
Coordinates42.20103, -87.93316
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating74.6 US tons
Inventory rating44.6 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length89 ft (27.1 m)
Longest span44 ft (13.4 m)
Deck width76 ft (23.2 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,100 (2023)
Projected traffic21,816 by 2046
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 45 & Il 21 over Indian Creek built?

It was built in 1990, making it 35 years old in 2025.

What condition is US 45 & Il 21 over Indian Creek 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 May 2023.

How much traffic does US 45 & Il 21 over Indian Creek carry?

About 25,100 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is US 45 & Il 21 over Indian Creek?

The structure is 89 ft (27.1 m) long with a longest span of 44 ft (13.4 m) and a deck 76 ft wide.

Who owns US 45 & Il 21 over Indian Creek?

It is owned by the State Highway Agency.