US Bridges

TR 85 over Bonnie CR Trib

Good

Perry County, Illinois · 2 MI S of Swanwick · Structure no. 073315900000000

Built
1994
31 years old
Condition
Good
inspected January 2024
Type
Channel Beam
Concrete
Length
38 ft
1 main span
Daily traffic
50
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 85 over Bonnie CR Trib is a concrete channel beam carrying TR 85 over Bonnie CR Trib in Perry 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 50 vehicles a day, roughly 32% of them trucks, projected to reach 51 by 2046. The structure is 38 ft (11.5 m) long and 23 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesTR 85
CrossesBonnie CR Trib
Location2 MI S of Swanwick
RouteCounty Highway 0
Coordinates38.1384, -89.53199
Functional classRural Local

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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.2 US tons
Inventory rating32.2 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length38 ft (11.5 m)
Longest span35 ft (10.7 m)
Deck width23 ft (6.9 m)
Roadway width21 ft (6.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2024)
Projected traffic51 by 2046
Trucks32%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 TR 85 over Bonnie CR Trib built?

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

What condition is TR 85 over Bonnie CR Trib 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 2024.

How much traffic does TR 85 over Bonnie CR Trib carry?

About 50 vehicles per day (2024 count), of which roughly 32% are trucks.

How long is TR 85 over Bonnie CR Trib?

The structure is 38 ft (11.5 m) long with a longest span of 35 ft (10.7 m) and a deck 23 ft wide.

Who owns TR 85 over Bonnie CR Trib?

It is owned by the Town or Township Highway Agency.