US Bridges

TR 477 over Trib Sugar CR

Poor

McDonough County, Illinois · E.CTR-33-T4NR1W · Structure no. 055560600000000

Built
1915
110 years old
Condition
Poor
inspected January 2024
Type
Slab
Concrete
Length
22 ft
1 main span
Daily traffic
10
2016 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 477 over Trib Sugar CR is a concrete slab carrying TR 477 over Trib Sugar CR in McDonough County, Illinois. It was built in 1915, so it is 110 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 10 vehicles a day, projected to reach 10 by 2046. The structure is 22 ft (6.7 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 477
CrossesTrib Sugar CR
LocationE.CTR-33-T4NR1W
RouteCounty Highway 0
CountyMcDonough County
StateIllinois
Coordinates40.28498, -90.50855
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJanuary 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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating35.7 US tons
Inventory rating19.3 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span20 ft (6.1 m)
Deck width18 ft (5.5 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2016)
Projected traffic10 by 2046
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$53,000
NavigationNo navigation control on waterway

Frequently asked questions

When was TR 477 over Trib Sugar CR built?

It was built in 1915, making it 110 years old in 2025.

What condition is TR 477 over Trib Sugar 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 January 2024.

How much traffic does TR 477 over Trib Sugar CR carry?

About 10 vehicles per day (2016 count).

How long is TR 477 over Trib Sugar CR?

The structure is 22 ft (6.7 m) long with a longest span of 20 ft (6.1 m) and a deck 18 ft wide.

Who owns TR 477 over Trib Sugar CR?

It is owned by the Town or Township Highway Agency.