US Bridges

TR 55 over Big Grand Pierre Br

Fair

Pope County, Illinois · 2.5 MI W of Eichorn · Structure no. 076304400000000

Built
1977
48 years old
Condition
Fair
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
48 ft
1 main span
Daily traffic
25
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 55 over Big Grand Pierre Br is a prestressed concrete box beam or girders - multiple carrying TR 55 over Big Grand Pierre Br in Pope County, Illinois. It was built in 1977, so it is 48 years old, older 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 5 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 25 vehicles a day, roughly 12% of them trucks, projected to reach 76 by 2046. The structure is 48 ft (14.6 m) long and 22 ft wide.

Location

Open in Google Maps
CarriesTR 55
CrossesBig Grand Pierre Br
Location2.5 MI W of Eichorn
RouteCounty Highway 0
CountyPope County
StateIllinois
Coordinates37.48453, -88.44248
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length48 ft (14.6 m)
Longest span46 ft (14 m)
Deck width22 ft (6.6 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2023)
Projected traffic76 by 2046
Trucks12%
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 55 over Big Grand Pierre Br built?

It was built in 1977, making it 48 years old in 2025.

What condition is TR 55 over Big Grand Pierre Br 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 September 2023.

How much traffic does TR 55 over Big Grand Pierre Br carry?

About 25 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is TR 55 over Big Grand Pierre Br?

The structure is 48 ft (14.6 m) long with a longest span of 46 ft (14 m) and a deck 22 ft wide.

Who owns TR 55 over Big Grand Pierre Br?

It is owned by the Town or Township Highway Agency.