US Bridges

Il 17 over Mazon River

Fair

Kankakee County, Illinois · 1.5 M. E. of Reddick · Structure no. 046013000000000

Built
2003
22 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete Continuous
Length
90 ft
3 main spans
Daily traffic
2,300
2023 count
Owner
State
State Highway Agency

About this bridge

Il 17 over Mazon River is a concrete continuous slab carrying Il 17 over Mazon River in Kankakee County, Illinois. It was built in 2003, so it is 22 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 2,300 vehicles a day, roughly 18% of them trucks, projected to reach 2,091 by 2046. The structure is 90 ft (27.5 m) long and 35 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesIl 17
CrossesMazon River
Location1.5 M. E. of Reddick
RouteState Highway 17
Coordinates41.11444, -88.23547
Functional classRural Minor Arterial

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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be 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 rating73.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length90 ft (27.5 m)
Longest span32 ft (9.9 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,300 (2023)
Projected traffic2,091 by 2046
Trucks18%
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

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 17 over Mazon River built?

It was built in 2003, making it 22 years old in 2025.

What condition is Il 17 over Mazon River 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 March 2023.

How much traffic does Il 17 over Mazon River carry?

About 2,300 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is Il 17 over Mazon River?

The structure is 90 ft (27.5 m) long with a longest span of 32 ft (9.9 m) and a deck 35 ft wide.

Who owns Il 17 over Mazon River?

It is owned by the State Highway Agency.