US Bridges

Cottage Grove Av over Deer Crk

Fair

Cook County, Illinois · 0.2 M N of Sauk Trl · Structure no. 016271200000000

Built
2001
24 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
109 ft
3 main spans
Daily traffic
3,750
2022 count
Owner
County
County Highway Agency

About this bridge

Cottage Grove Av over Deer Crk is a prestressed concrete stringer/multi-beam or girder carrying Cottage Grove Av over Deer Crk in Cook County, Illinois. It was built in 2001, so it is 24 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 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 3,750 vehicles a day, roughly 7% of them trucks, projected to reach 5,656 by 2046. The structure is 109 ft (33.1 m) long and 62 ft wide.

Location

Open in Google Maps
CarriesCottage Grove Av
CrossesDeer Crk
Location0.2 M N of Sauk Trl
CountyCook County
StateIllinois
Coordinates41.48984, -87.59714
Functional classUrban Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable 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 rating98.2 US tons
Inventory rating71.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length109 ft (33.1 m)
Longest span37 ft (11.2 m)
Deck width62 ft (19 m)
Roadway width55 ft (16.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,750 (2022)
Projected traffic5,656 by 2046
Trucks7%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

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 Cottage Grove Av over Deer Crk built?

It was built in 2001, making it 24 years old in 2025.

What condition is Cottage Grove Av over Deer Crk 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 May 2023.

How much traffic does Cottage Grove Av over Deer Crk carry?

About 3,750 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is Cottage Grove Av over Deer Crk?

The structure is 109 ft (33.1 m) long with a longest span of 37 ft (11.2 m) and a deck 62 ft wide.

Who owns Cottage Grove Av over Deer Crk?

It is owned by the County Highway Agency.