US Bridges

TR 100 over Little Plum Creek

PoorPosted for load

Randolph County, Illinois · .5 NW Preston · Structure no. 079415400000000

Built
1964
61 years old
Condition
Poor
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
117 ft
1 main span
Daily traffic
50
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 100 over Little Plum Creek is a steel stringer/multi-beam or girder carrying TR 100 over Little Plum Creek in Randolph County, Illinois. It was built in 1964, so it is 61 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 50 vehicles a day, roughly 14% of them trucks, projected to reach 51 by 2046. The structure is 117 ft (35.7 m) long and 19 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

CarriesTR 100
CrossesLittle Plum Creek
Location.5 NW Preston
RouteCounty Highway 0
Coordinates38.1124, -89.86616
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating41.8 US tons
Inventory rating25 US tons

Structure

MaterialSteel
DeckConcrete, precast panels
Main spans1 (+2 approach)
Design loadHS 15
Structure length117 ft (35.7 m)
Longest span55 ft (16.8 m)
Deck width19 ft (5.7 m)
Roadway width16 ft (5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2024)
Projected traffic51 by 2046
Trucks14%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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$114,000
NavigationNo navigation control on waterway

Frequently asked questions

When was TR 100 over Little Plum Creek built?

It was built in 1964, making it 61 years old in 2025.

What condition is TR 100 over Little Plum Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in January 2025.

How much traffic does TR 100 over Little Plum Creek carry?

About 50 vehicles per day (2024 count), of which roughly 14% are trucks.

How long is TR 100 over Little Plum Creek?

The structure is 117 ft (35.7 m) long with a longest span of 55 ft (16.8 m) and a deck 19 ft wide.

Who owns TR 100 over Little Plum Creek?

It is owned by the Town or Township Highway Agency.