US Bridges

Lake Cook RD over Buffalo CR

Fair

Cook County, Illinois · 0.5 W Buffalo Gr P25 · Structure no. 016320300000000

Built
1978
47 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
63 ft
1 main span
Daily traffic
29,400
2022 count
Owner
County
County Highway Agency

About this bridge

Lake Cook RD over Buffalo CR is a steel stringer/multi-beam or girder carrying Lake Cook RD over Buffalo CR in Cook County, Illinois. It was built in 1978, so it is 47 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 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 29,400 vehicles a day, roughly 5% of them trucks, projected to reach 36,360 by 2046. The structure is 63 ft (19.1 m) long and 80 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesLake Cook RD
CrossesBuffalo CR
Location0.5 W Buffalo Gr P25
CountyCook County
StateIllinois
Coordinates42.15181, -87.96938
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating71.1 US tons
Inventory rating42.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length63 ft (19.1 m)
Longest span58 ft (17.7 m)
Deck width80 ft (24.4 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,400 (2022)
Projected traffic36,360 by 2046
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Lake Cook RD over Buffalo CR built?

It was built in 1978, making it 47 years old in 2025.

What condition is Lake Cook RD over Buffalo CR 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 Lake Cook RD over Buffalo CR carry?

About 29,400 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Lake Cook RD over Buffalo CR?

The structure is 63 ft (19.1 m) long with a longest span of 58 ft (17.7 m) and a deck 80 ft wide.

Who owns Lake Cook RD over Buffalo CR?

It is owned by the County Highway Agency.