US Bridges

TR 129 over Lake Fork Tributary

Fair

Piatt County, Illinois · 2.1 MI NW Ivesdale · Structure no. 074321800000000

Built
1986
39 years old
Condition
Fair
inspected November 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
36 ft
1 main span
Daily traffic
25
2020 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 129 over Lake Fork Tributary is a prestressed concrete box beam or girders - multiple carrying TR 129 over Lake Fork Tributary in Piatt County, Illinois. It was built in 1986, so it is 39 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 25 vehicles a day, projected to reach 25 by 2046. The structure is 36 ft (11 m) long and 27 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesTR 129
CrossesLake Fork Tributary
Location2.1 MI NW Ivesdale
RouteCounty Highway 0
CountyPiatt County
StateIllinois
Coordinates39.96694, -88.48672
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length36 ft (11 m)
Longest span34 ft (10.4 m)
Deck width27 ft (8.2 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2020)
Projected traffic25 by 2046
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 129 over Lake Fork Tributary built?

It was built in 1986, making it 39 years old in 2025.

What condition is TR 129 over Lake Fork Tributary 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 November 2023.

How much traffic does TR 129 over Lake Fork Tributary carry?

About 25 vehicles per day (2020 count).

How long is TR 129 over Lake Fork Tributary?

The structure is 36 ft (11 m) long with a longest span of 34 ft (10.4 m) and a deck 27 ft wide.

Who owns TR 129 over Lake Fork Tributary?

It is owned by the Town or Township Highway Agency.