US Bridges

71st.ST. over I-355

Fair

DuPage County, Illinois · 1.5M.E.OF IL-53 · Structure no. 022998400000000

Built
1989
36 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
211 ft
2 main spans
Daily traffic
4,900
2024 count
Owner
Toll Authority
State Toll Authority

About this bridge

71st.ST. over I-355 is a prestressed concrete stringer/multi-beam or girder carrying 71st.ST. over I-355 in DuPage County, Illinois. It was built in 1989, so it is 36 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 4,900 vehicles a day, roughly 4% of them trucks, projected to reach 4,091 by 2046. The structure is 211 ft (64.3 m) long and 52 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries71st.ST.
CrossesI-355
Location1.5M.E.OF IL-53
CountyDuPage County
StateIllinois
Coordinates41.75791, -88.03563
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73.5 US tons
Inventory rating44.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length211 ft (64.3 m)
Longest span105 ft (32 m)
Deck width52 ft (15.9 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,900 (2024)
Projected traffic4,091 by 2046
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.7 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was 71st.ST. over I-355 built?

It was built in 1989, making it 36 years old in 2025.

What condition is 71st.ST. over I-355 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 2024.

How much traffic does 71st.ST. over I-355 carry?

About 4,900 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is 71st.ST. over I-355?

The structure is 211 ft (64.3 m) long with a longest span of 105 ft (32 m) and a deck 52 ft wide.

Who owns 71st.ST. over I-355?

It is owned by the State Toll Authority.