US Bridges

TR-66 (mill Road) over BNSF RR

PoorPosted for load

Carroll County, Illinois · 2 MI NE Argo Fay · Structure no. 008991400000000

Built
1920
105 years old
Condition
Poor
inspected October 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
138 ft
9 main spans
Daily traffic
50
2021 count
Owner
Railroad
Railroad

About this bridge

TR-66 (mill Road) over BNSF RR is a wood or timber stringer/multi-beam or girder carrying TR-66 (mill Road) over BNSF RR in Carroll County, Illinois. It was built in 1920, so it is 105 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 3 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 12% of them trucks, projected to reach 51 by 2046. The structure is 138 ft (42.1 m) long and 18 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesTR-66 (mill Road)
CrossesBNSF RR
Location2 MI NE Argo Fay
RouteCounty Highway 0
CountyCarroll County
StateIllinois
Coordinates42.03414, -89.99194
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.
Superstructure7 GoodSome minor problems.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment6: Equal to present minimum criteria
Operating rating27.4 US tons
Inventory rating19.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans9
Design loadUnknown
Structure length138 ft (42.1 m)
Longest span24 ft (7.4 m)
Deck width18 ft (5.5 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2021)
Projected traffic51 by 2046
Trucks12%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerRailroad
Maintained byRailroad
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$329,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was TR-66 (mill Road) over BNSF RR built?

It was built in 1920, making it 105 years old in 2025.

What condition is TR-66 (mill Road) over BNSF RR 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 October 2023.

How much traffic does TR-66 (mill Road) over BNSF RR carry?

About 50 vehicles per day (2021 count), of which roughly 12% are trucks.

How long is TR-66 (mill Road) over BNSF RR?

The structure is 138 ft (42.1 m) long with a longest span of 24 ft (7.4 m) and a deck 18 ft wide.

Who owns TR-66 (mill Road) over BNSF RR?

It is owned by the Railroad.