US Bridges

TR 109 over Branch of Bonnie CR

Fair

Perry County, Illinois · 3.5 MI N of Conant · Structure no. 073314500000000

Built
1991
34 years old
Condition
Fair
inspected January 2025
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
30 ft
1 main span
Daily traffic
100
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 109 over Branch of Bonnie CR is a prestressed concrete box beam or girders - multiple carrying TR 109 over Branch of Bonnie CR in Perry County, Illinois. It was built in 1991, so it is 34 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 5 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 100 vehicles a day, roughly 25% of them trucks, projected to reach 126 by 2046. The structure is 30 ft (9.2 m) long and 24 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesTR 109
CrossesBranch of Bonnie CR
Location3.5 MI N of Conant
RouteCounty Highway 0
Coordinates38.10738, -89.49919
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length30 ft (9.2 m)
Longest span28 ft (8.4 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2024)
Projected traffic126 by 2046
Trucks25%
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 109 over Branch of Bonnie CR built?

It was built in 1991, making it 34 years old in 2025.

What condition is TR 109 over Branch of Bonnie CR 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 January 2025.

How much traffic does TR 109 over Branch of Bonnie CR carry?

About 100 vehicles per day (2024 count), of which roughly 25% are trucks.

How long is TR 109 over Branch of Bonnie CR?

The structure is 30 ft (9.2 m) long with a longest span of 28 ft (8.4 m) and a deck 24 ft wide.

Who owns TR 109 over Branch of Bonnie CR?

It is owned by the Town or Township Highway Agency.