US Bridges

Onwentsia Road over Skokie River

Fair

Lake County, Illinois · Onwentsia W Green Ba · Structure no. 049686800000000

Built
1993
32 years old
Condition
Fair
inspected June 2024
Type
Slab
Concrete Continuous
Length
70 ft
1 main span
Daily traffic
525
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Onwentsia Road over Skokie River is a concrete continuous slab carrying Onwentsia Road over Skokie River in Lake County, Illinois. It was built in 1993, so it is 32 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 525 vehicles a day, roughly 4% of them trucks, projected to reach 732 by 2046. The structure is 70 ft (21.4 m) long and 26 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesOnwentsia Road
CrossesSkokie River
LocationOnwentsia W Green Ba
RouteCity Street 0
Coordinates42.23799, -87.84912
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, precast panels
Main spans1 (+2 approach)
Design loadHS 20
Structure length70 ft (21.4 m)
Longest span26 ft (7.9 m)
Deck width26 ft (7.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic525 (2023)
Projected traffic732 by 2046
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
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 Onwentsia Road over Skokie River built?

It was built in 1993, making it 32 years old in 2025.

What condition is Onwentsia Road over Skokie River 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 June 2024.

How much traffic does Onwentsia Road over Skokie River carry?

About 525 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Onwentsia Road over Skokie River?

The structure is 70 ft (21.4 m) long with a longest span of 26 ft (7.9 m) and a deck 26 ft wide.

Who owns Onwentsia Road over Skokie River?

It is owned by the City or Municipal Highway Agency.