US Bridges

TR 69C over I-39/US 51

Fair

Marshall County, Illinois · 1 MI N of Ill 17 · Structure no. 062004900000000

Built
1991
34 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
250 ft
3 main spans
Daily traffic
175
2024 count
Owner
State
State Highway Agency

About this bridge

TR 69C over I-39/US 51 is a steel continuous stringer/multi-beam or girder carrying TR 69C over I-39/US 51 in Marshall 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 175 vehicles a day, roughly 10% of them trucks, projected to reach 126 by 2046. The structure is 250 ft (76.3 m) long and 37 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesTR 69C
CrossesI-39/US 51
Location1 MI N of Ill 17
RouteCounty Highway 0
CountyMarshall County
StateIllinois
Coordinates41.04265, -89.05656
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating76.4 US tons
Inventory rating45.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length250 ft (76.3 m)
Longest span180 ft (54.8 m)
Deck width37 ft (11.3 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic175 (2024)
Projected traffic126 by 2046
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was TR 69C over I-39/US 51 built?

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

What condition is TR 69C over I-39/US 51 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 March 2023.

How much traffic does TR 69C over I-39/US 51 carry?

About 175 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is TR 69C over I-39/US 51?

The structure is 250 ft (76.3 m) long with a longest span of 180 ft (54.8 m) and a deck 37 ft wide.

Who owns TR 69C over I-39/US 51?

It is owned by the State Highway Agency.