US Bridges

I-294 SB over Algonquin RD

Fair

Cook County, Illinois · 0.7 M S US 14 P11 · Structure no. 016976300000000

Built
1958
67 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
120 ft
1 main span
Daily traffic
85,700
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

I-294 SB over Algonquin RD is a steel stringer/multi-beam or girder carrying I-294 SB over Algonquin RD in Cook County, Illinois. It was built in 1958, so it is 67 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 85,700 vehicles a day, roughly 11% of them trucks, projected to reach 69,488 by 2046. The structure is 120 ft (36.6 m) long and 61 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-294 SB
CrossesAlgonquin RD
Location0.7 M S US 14 P11
RouteInterstate 294
CountyCook County
StateIllinois
Coordinates42.02715, -87.86564
Functional classUrban Principal Arterial - Interstate

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.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89 US tons
Inventory rating53.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length120 ft (36.6 m)
Longest span117 ft (35.7 m)
Deck width61 ft (18.6 m)
Roadway width47 ft (14.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic85,700 (2023)
Projected traffic69,488 by 2046
Trucks11%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a toll road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-294 SB over Algonquin RD built?

It was built in 1958, making it 67 years old in 2025.

What condition is I-294 SB over Algonquin RD 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 April 2023.

How much traffic does I-294 SB over Algonquin RD carry?

About 85,700 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is I-294 SB over Algonquin RD?

The structure is 120 ft (36.6 m) long with a longest span of 117 ft (35.7 m) and a deck 61 ft wide.

Who owns I-294 SB over Algonquin RD?

It is owned by the State Toll Authority.