US Bridges

Il 59 over Wetlands

Fair

Cook County, Illinois · 0.3 M N of Il 19 · Structure no. 016270000000000

Built
1997
28 years old
Condition
Fair
inspected February 2024
Type
Slab
Concrete Continuous
Length
100 ft
3 main spans
Daily traffic
36,200
2023 count
Owner
State
State Highway Agency

About this bridge

Il 59 over Wetlands is a concrete continuous slab carrying Il 59 over Wetlands in Cook County, Illinois. It was built in 1997, so it is 28 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 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 36,200 vehicles a day, roughly 7% of them trucks, projected to reach 34,542 by 2046. The structure is 100 ft (30.5 m) long and 71 ft wide.

CarriesIl 59
CrossesWetlands
Location0.3 M N of Il 19
RouteState Highway 59
Coordinates42.02369, -88.20304
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length100 ft (30.5 m)
Longest span37 ft (11.4 m)
Deck width71 ft (21.7 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36,200 (2023)
Projected traffic34,542 by 2046
Trucks7%
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 Il 59 over Wetlands built?

It was built in 1997, making it 28 years old in 2025.

What condition is Il 59 over Wetlands 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 February 2024.

How much traffic does Il 59 over Wetlands carry?

About 36,200 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Il 59 over Wetlands?

The structure is 100 ft (30.5 m) long with a longest span of 37 ft (11.4 m) and a deck 71 ft wide.

Who owns Il 59 over Wetlands?

It is owned by the State Highway Agency.