US Bridges

Il 171 over Fraction Run Creek

Good

Will County, Illinois · 1.3 M S Il 7 · Structure no. 099034000000000

Built
1994
31 years old
Condition
Good
inspected January 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
73 ft
1 main span
Daily traffic
10,500
2023 count
Owner
State
State Highway Agency

About this bridge

Il 171 over Fraction Run Creek is a prestressed concrete stringer/multi-beam or girder carrying Il 171 over Fraction Run Creek in Will County, Illinois. It was built in 1994, so it is 31 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 10,500 vehicles a day, roughly 11% of them trucks, projected to reach 17,424 by 2046. The structure is 73 ft (22.1 m) long and 62 ft wide.

Location

Open in Google Maps
CarriesIl 171
CrossesFraction Run Creek
Location1.3 M S Il 7
RouteState Highway 171
CountyWill County
StateIllinois
Coordinates41.57195, -88.06738
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
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 rating88.2 US tons
Inventory rating51.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length73 ft (22.1 m)
Longest span70 ft (21.4 m)
Deck width62 ft (18.9 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,500 (2023)
Projected traffic17,424 by 2046
Trucks11%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemYes

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Il 171 over Fraction Run Creek built?

It was built in 1994, making it 31 years old in 2025.

What condition is Il 171 over Fraction Run Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2022.

How much traffic does Il 171 over Fraction Run Creek carry?

About 10,500 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is Il 171 over Fraction Run Creek?

The structure is 73 ft (22.1 m) long with a longest span of 70 ft (21.4 m) and a deck 62 ft wide.

Who owns Il 171 over Fraction Run Creek?

It is owned by the State Highway Agency.