US Bridges

Wolf RD over Flag Creek

Poor

Cook County, Illinois · 0.9 M N 79th P10 · Structure no. 016301600000000

Built
1960
65 years old
Condition
Poor
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
101 ft
2 main spans
Daily traffic
9,850
2022 count
Owner
County
County Highway Agency

About this bridge

Wolf RD over Flag Creek is a prestressed concrete stringer/multi-beam or girder carrying Wolf RD over Flag Creek in Cook County, Illinois. It was built in 1960, so it is 65 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: open, would be posted or closed except for temporary shoring.

It carries about 9,850 vehicles a day, roughly 3% of them trucks, projected to reach 11,009 by 2046. The structure is 101 ft (30.7 m) long and 42 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesWolf RD
CrossesFlag Creek
Location0.9 M N 79th P10
Coordinates41.75992, -87.89658
Functional classUrban Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, would be posted or closed except for temporary shoring
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating28.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length101 ft (30.7 m)
Longest span49 ft (14.8 m)
Deck width42 ft (12.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,850 (2022)
Projected traffic11,009 by 2046
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$716,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Wolf RD over Flag Creek built?

It was built in 1960, making it 65 years old in 2025.

What condition is Wolf RD over Flag Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2023.

How much traffic does Wolf RD over Flag Creek carry?

About 9,850 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Wolf RD over Flag Creek?

The structure is 101 ft (30.7 m) long with a longest span of 49 ft (14.8 m) and a deck 42 ft wide.

Who owns Wolf RD over Flag Creek?

It is owned by the County Highway Agency.