US Bridges

Il 120 NW Rmp @ Il over Stream

Fair

Lake County, Illinois · Inters Ill 120 & 21 · Structure no. 049005300000000

Built
1961
64 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete
Length
30 ft
1 main span
Daily traffic
1,400
2023 count
Owner
State
State Highway Agency

About this bridge

Il 120 NW Rmp @ Il over Stream is a concrete slab carrying Il 120 NW Rmp @ Il over Stream in Lake County, Illinois. It was built in 1961, so it is 64 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 1,400 vehicles a day, roughly 10% of them trucks, projected to reach 1,818 by 2046. The structure is 30 ft (9.1 m) long and 34 ft wide.

Location

Open in Google Maps
CarriesIl 120 NW Rmp @ Il
CrossesStream
LocationInters Ill 120 & 21
CountyLake County
StateIllinois
Coordinates42.34354, -87.94828
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to 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 alignment8: Equal to present desirable criteria
Operating rating54.7 US tons
Inventory rating32.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span29 ft (8.8 m)
Deck width34 ft (10.5 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,400 (2023)
Projected traffic1,818 by 2046
Trucks10%
Lanes on structure1
Traffic directionOne-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 120 NW Rmp @ Il over Stream built?

It was built in 1961, making it 64 years old in 2025.

What condition is Il 120 NW Rmp @ Il over Stream 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 July 2023.

How much traffic does Il 120 NW Rmp @ Il over Stream carry?

About 1,400 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Il 120 NW Rmp @ Il over Stream?

The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 34 ft wide.

Who owns Il 120 NW Rmp @ Il over Stream?

It is owned by the State Highway Agency.