US Bridges

Old Lemont Road over Desplaines River

Good

Cook County, Illinois · North Lemont · Structure no. 016252800000000

Built
1985
40 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
314 ft
5 main spans
Daily traffic
1,800
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Old Lemont Road over Desplaines River is a prestressed concrete continuous stringer/multi-beam or girder carrying Old Lemont Road over Desplaines River in Cook County, Illinois. It was built in 1985, so it is 40 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,800 vehicles a day, roughly 49% of them trucks, projected to reach 1,465 by 2046. The structure is 314 ft (95.7 m) long and 31 ft wide.

CarriesOld Lemont Road
CrossesDesplaines River
LocationNorth Lemont
RouteCity Street 0
Coordinates41.68018, -88.00194
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating71.4 US tons
Inventory rating43.5 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length314 ft (95.7 m)
Longest span84 ft (25.6 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,800 (2022)
Projected traffic1,465 by 2046
Trucks49%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Old Lemont Road over Desplaines River built?

It was built in 1985, making it 40 years old in 2025.

What condition is Old Lemont Road over Desplaines River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2023.

How much traffic does Old Lemont Road over Desplaines River carry?

About 1,800 vehicles per day (2022 count), of which roughly 49% are trucks.

How long is Old Lemont Road over Desplaines River?

The structure is 314 ft (95.7 m) long with a longest span of 84 ft (25.6 m) and a deck 31 ft wide.

Who owns Old Lemont Road over Desplaines River?

It is owned by the City or Municipal Highway Agency.