US Bridges

US 12 20 45 SB over RR - Cn & Canals

Fair

Cook County, Illinois · 0.9 M S I-55 · Structure no. 016240600000000

Built
1980
45 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,342 ft
13 main spans
Daily traffic
64,200
2021 count
Owner
State
State Highway Agency

About this bridge

US 12 20 45 SB over RR - Cn & Canals is a steel continuous stringer/multi-beam or girder carrying US 12 20 45 SB over RR - Cn & Canals in Cook County, Illinois. It was built in 1980, so it is 45 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 64,200 vehicles a day, roughly 13% of them trucks, projected to reach 32,421 by 2046. The structure is 1,342 ft (409 m) long and 43 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesUS 12 20 45 SB
CrossesRR - Cn & Canals
Location0.9 M S I-55
RouteU.S. Route 12
CountyCook County
StateIllinois
Coordinates41.75063, -87.85895
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating37.8 US tons
Inventory rating29.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans13
Design loadHS 20
Structure length1,342 ft (409 m)
Longest span290 ft (88.4 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic64,200 (2021)
Projected traffic32,421 by 2046
Trucks13%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad and waterway
Detour if closed6.2 mi (10 km)
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 US 12 20 45 SB over RR - Cn & Canals built?

It was built in 1980, making it 45 years old in 2025.

What condition is US 12 20 45 SB over RR - Cn & Canals 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 September 2023.

How much traffic does US 12 20 45 SB over RR - Cn & Canals carry?

About 64,200 vehicles per day (2021 count), of which roughly 13% are trucks.

How long is US 12 20 45 SB over RR - Cn & Canals?

The structure is 1,342 ft (409 m) long with a longest span of 290 ft (88.4 m) and a deck 43 ft wide.

Who owns US 12 20 45 SB over RR - Cn & Canals?

It is owned by the State Highway Agency.