US Bridges

TR 120 over Flat Branch

Poor

Coles County, Illinois · 2.9 Mi. E Humboldt · Structure no. 015339600000000

Built
2015
10 years old
Condition
Poor
inspected January 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
71 ft
1 main span
Daily traffic
175
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 120 over Flat Branch is a prestressed concrete box beam or girders - multiple carrying TR 120 over Flat Branch in Coles County, Illinois. It was built in 2015, so it is 10 years old, younger 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 175 vehicles a day, roughly 7% of them trucks, projected to reach 101 by 2046. The structure is 71 ft (21.5 m) long and 27 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesTR 120
CrossesFlat Branch
Location2.9 Mi. E Humboldt
RouteCounty Highway 0
CountyColes County
StateIllinois
Coordinates39.59811, -88.26589
Functional classRural Local

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.
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 evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.6 US tons
Inventory rating38.3 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length71 ft (21.5 m)
Longest span69 ft (21 m)
Deck width27 ft (8.2 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic175 (2024)
Projected traffic101 by 2046
Trucks7%
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

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was TR 120 over Flat Branch built?

It was built in 2015, making it 10 years old in 2025.

What condition is TR 120 over Flat Branch 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 January 2024.

How much traffic does TR 120 over Flat Branch carry?

About 175 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is TR 120 over Flat Branch?

The structure is 71 ft (21.5 m) long with a longest span of 69 ft (21 m) and a deck 27 ft wide.

Who owns TR 120 over Flat Branch?

It is owned by the Town or Township Highway Agency.