US Bridges

Ch 16 over Black Walnut CR

Poor

Kankakee County, Illinois · 3.2 MI NE Manteno · Structure no. 046323200000000

Built
1965
60 years old
Condition
Poor
inspected June 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
55 ft
1 main span
Daily traffic
1,900
2021 count
Owner
County
County Highway Agency

About this bridge

Ch 16 over Black Walnut CR is a prestressed concrete box beam or girders - multiple carrying Ch 16 over Black Walnut CR in Kankakee County, Illinois. It was built in 1965, so it is 60 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 4 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.

It carries about 1,900 vehicles a day, roughly 20% of them trucks, projected to reach 1,938 by 2046. The structure is 55 ft (16.9 m) long and 29 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesCh 16
CrossesBlack Walnut CR
Location3.2 MI NE Manteno
RouteCounty Highway 0
Coordinates41.29571, -87.79475
Functional classRural Major 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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating23.3 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 15
Structure length55 ft (16.9 m)
Longest span54 ft (16.5 m)
Deck width29 ft (8.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,900 (2021)
Projected traffic1,938 by 2046
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ch 16 over Black Walnut CR built?

It was built in 1965, making it 60 years old in 2025.

What condition is Ch 16 over Black Walnut CR 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 2024.

How much traffic does Ch 16 over Black Walnut CR carry?

About 1,900 vehicles per day (2021 count), of which roughly 20% are trucks.

How long is Ch 16 over Black Walnut CR?

The structure is 55 ft (16.9 m) long with a longest span of 54 ft (16.5 m) and a deck 29 ft wide.

Who owns Ch 16 over Black Walnut CR?

It is owned by the County Highway Agency.