US Bridges

TR-112-A over Br Fourmile Grove CR

Poor

LaSalle County, Illinois · E 6th N 4640 · Structure no. 050310600000000

Built
1961
64 years old
Condition
Poor
inspected June 2024
Type
Channel Beam
Concrete
Length
37 ft
1 main span
Daily traffic
25
2016 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR-112-A over Br Fourmile Grove CR is a concrete channel beam carrying TR-112-A over Br Fourmile Grove CR in LaSalle County, Illinois. It was built in 1961, so it is 64 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.

It carries about 25 vehicles a day, roughly 40% of them trucks, projected to reach 25 by 2046. The structure is 37 ft (11.3 m) long and 27 ft wide.

Location

Open in Google Maps
CarriesTR-112-A
CrossesBr Fourmile Grove CR
LocationE 6th N 4640
RouteCounty Highway 0
CountyLaSalle County
StateIllinois
Coordinates41.60446, -89.05158
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.5 US tons
Inventory rating31.4 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 15
Structure length37 ft (11.3 m)
Longest span35 ft (10.7 m)
Deck width27 ft (8.1 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2016)
Projected traffic25 by 2046
Trucks40%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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-112-A over Br Fourmile Grove CR built?

It was built in 1961, making it 64 years old in 2025.

What condition is TR-112-A over Br Fourmile Grove CR 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 June 2024.

How much traffic does TR-112-A over Br Fourmile Grove CR carry?

About 25 vehicles per day (2016 count), of which roughly 40% are trucks.

How long is TR-112-A over Br Fourmile Grove CR?

The structure is 37 ft (11.3 m) long with a longest span of 35 ft (10.7 m) and a deck 27 ft wide.

Who owns TR-112-A over Br Fourmile Grove CR?

It is owned by the Town or Township Highway Agency.