US Bridges

TR 80 over I-74

Good

Piatt County, Illinois · 3 MI E of US 54 · Structure no. 074004000000000

Built
1970
55 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
255 ft
2 main spans
Daily traffic
150
2020 count
Owner
State
State Highway Agency

About this bridge

TR 80 over I-74 is a steel continuous stringer/multi-beam or girder carrying TR 80 over I-74 in Piatt County, Illinois. It was built in 1970, so it is 55 years old, older 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 150 vehicles a day, roughly 44% of them trucks, projected to reach 152 by 2046. The structure is 255 ft (77.7 m) long and 30 ft wide.

Location

Open in Google Maps
CarriesTR 80
CrossesI-74
Location3 MI E of US 54
RouteCounty Highway 0
CountyPiatt County
StateIllinois
Coordinates40.23381, -88.57488
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.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating63.6 US tons
Inventory rating38.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 15
Structure length255 ft (77.7 m)
Longest span92 ft (28 m)
Deck width30 ft (9.1 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2020)
Projected traffic152 by 2046
Trucks44%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was TR 80 over I-74 built?

It was built in 1970, making it 55 years old in 2025.

What condition is TR 80 over I-74 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 December 2023.

How much traffic does TR 80 over I-74 carry?

About 150 vehicles per day (2020 count), of which roughly 44% are trucks.

How long is TR 80 over I-74?

The structure is 255 ft (77.7 m) long with a longest span of 92 ft (28 m) and a deck 30 ft wide.

Who owns TR 80 over I-74?

It is owned by the State Highway Agency.