US Bridges

170th ST over I- 94 Bishop Ford

Fair

Cook County, Illinois · 1 M S of US 6 · Structure no. 016280300000000

Built
2004
21 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
260 ft
2 main spans
Daily traffic
10,200
2022 count
Owner
State
State Highway Agency

About this bridge

170th ST over I- 94 Bishop Ford is a steel continuous stringer/multi-beam or girder carrying 170th ST over I- 94 Bishop Ford in Cook County, Illinois. It was built in 2004, so it is 21 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 10,200 vehicles a day, roughly 4% of them trucks, projected to reach 9,999 by 2046. The structure is 260 ft (79.4 m) long and 74 ft wide.

Location

Open in Google Maps
Carries170th ST
CrossesI- 94 Bishop Ford
Location1 M S of US 6
CountyCook County
StateIllinois
Coordinates41.58646, -87.58362
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.8 US tons
Inventory rating37.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length260 ft (79.4 m)
Longest span134 ft (40.7 m)
Deck width74 ft (22.7 m)
Roadway width59 ft (17.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,200 (2022)
Projected traffic9,999 by 2046
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was 170th ST over I- 94 Bishop Ford built?

It was built in 2004, making it 21 years old in 2025.

What condition is 170th ST over I- 94 Bishop Ford 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 February 2023.

How much traffic does 170th ST over I- 94 Bishop Ford carry?

About 10,200 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is 170th ST over I- 94 Bishop Ford?

The structure is 260 ft (79.4 m) long with a longest span of 134 ft (40.7 m) and a deck 74 ft wide.

Who owns 170th ST over I- 94 Bishop Ford?

It is owned by the State Highway Agency.