US Bridges

Kilbourne RD over Des Plaines Trib.

Fair

Lake County, Illinois · 0.7M S of State Line · Structure no. 049500500000000

Built
1954
71 years old, rebuilt 1993
Condition
Fair
inspected January 2024
Type
Culvert
Concrete
Length
28 ft
3 main spans
Daily traffic
2,450
2023 count
Owner
County
County Highway Agency

About this bridge

Kilbourne RD over Des Plaines Trib. is a concrete culvert carrying Kilbourne RD over Des Plaines Trib. in Lake County, Illinois. It was built in 1954 and reconstructed in 1993, so it is 71 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 6 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 2,450 vehicles a day, roughly 15% of them trucks, projected to reach 2,929 by 2046. The structure is 28 ft (8.6 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesKilbourne RD
CrossesDes Plaines Trib.
Location0.7M S of State Line
CountyLake County
StateIllinois
Coordinates42.48323, -87.91281
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.3 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length28 ft (8.6 m)
Longest span7 ft (2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,450 (2023)
Projected traffic2,929 by 2046
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Kilbourne RD over Des Plaines Trib. built?

It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1993.

What condition is Kilbourne RD over Des Plaines Trib. 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 January 2024.

How much traffic does Kilbourne RD over Des Plaines Trib. carry?

About 2,450 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is Kilbourne RD over Des Plaines Trib.?

The structure is 28 ft (8.6 m) long with a longest span of 7 ft (2 m).

Who owns Kilbourne RD over Des Plaines Trib.?

It is owned by the County Highway Agency.