US Bridges

TR-511 over Trib Lone Grove Br

Fair

Fayette County, Illinois · 1 MI N ST Peter · Structure no. 026323200000000

Built
1935
90 years old
Condition
Fair
inspected February 2025
Type
Slab
Concrete
Length
44 ft
2 main spans
Daily traffic
50
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR-511 over Trib Lone Grove Br is a concrete slab carrying TR-511 over Trib Lone Grove Br in Fayette County, Illinois. It was built in 1935, so it is 90 years old, older 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 6 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 50 vehicles a day, roughly 4% of them trucks, projected to reach 51 by 2046. The structure is 44 ft (13.4 m) long and 14 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesTR-511
CrossesTrib Lone Grove Br
Location1 MI N ST Peter
RouteCounty Highway 0
CountyFayette County
StateIllinois
Coordinates38.88258, -88.85494
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating47.5 US tons
Inventory rating28.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length44 ft (13.4 m)
Longest span28 ft (8.5 m)
Deck width14 ft (4.3 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2023)
Projected traffic51 by 2046
Trucks4%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$170,000
NavigationNo navigation control on waterway

Frequently asked questions

When was TR-511 over Trib Lone Grove Br built?

It was built in 1935, making it 90 years old in 2025.

What condition is TR-511 over Trib Lone Grove Br 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 February 2025.

How much traffic does TR-511 over Trib Lone Grove Br carry?

About 50 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is TR-511 over Trib Lone Grove Br?

The structure is 44 ft (13.4 m) long with a longest span of 28 ft (8.5 m) and a deck 14 ft wide.

Who owns TR-511 over Trib Lone Grove Br?

It is owned by the Town or Township Highway Agency.