US Bridges

TR 105 over Trib to Plum Ck

Fair

Randolph County, Illinois · 2 MI West Sparta · Structure no. 079413600000000

Built
1996
29 years old
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Concrete
Length
60 ft
1 main span
Daily traffic
375
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 105 over Trib to Plum Ck is a concrete stringer/multi-beam or girder carrying TR 105 over Trib to Plum Ck in Randolph County, Illinois. It was built in 1996, so it is 29 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 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 375 vehicles a day, roughly 9% of them trucks, projected to reach 328 by 2046. The structure is 60 ft (18.3 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesTR 105
CrossesTrib to Plum Ck
Location2 MI West Sparta
RouteCounty Highway 0
Coordinates38.1312, -89.74921
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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length60 ft (18.3 m)
Longest span55 ft (16.8 m)
Deck width24 ft (7.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic375 (2024)
Projected traffic328 by 2046
Trucks9%
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was TR 105 over Trib to Plum Ck built?

It was built in 1996, making it 29 years old in 2025.

What condition is TR 105 over Trib to Plum Ck 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 105 over Trib to Plum Ck carry?

About 375 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is TR 105 over Trib to Plum Ck?

The structure is 60 ft (18.3 m) long with a longest span of 55 ft (16.8 m) and a deck 24 ft wide.

Who owns TR 105 over Trib to Plum Ck?

It is owned by the Town or Township Highway Agency.