US Bridges

TR 351 over Trib to Pigeon CR

Poor

Iroquois County, Illinois · 2.2 MI W. Ill Rt 49 · Structure no. 038512800000000

Built
1961
64 years old
Condition
Poor
inspected August 2024
Type
Channel Beam
Concrete
Length
56 ft
3 main spans
Daily traffic
25
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 351 over Trib to Pigeon CR is a concrete channel beam carrying TR 351 over Trib to Pigeon CR in Iroquois 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 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.

It carries about 25 vehicles a day, projected to reach 25 by 2046. The structure is 56 ft (17.1 m) long and 22 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesTR 351
CrossesTrib to Pigeon CR
Location2.2 MI W. Ill Rt 49
RouteCounty Highway 0
CountyIroquois County
StateIllinois
Coordinates40.54344, -87.9395
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.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.8 US tons
Inventory rating27.4 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 15
Structure length56 ft (17.1 m)
Longest span20 ft (6.1 m)
Deck width22 ft (6.8 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2022)
Projected traffic25 by 2046
Trucks0%
Lanes on structure2
Traffic directionTwo-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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$119,000
NavigationNo navigation control on waterway

Frequently asked questions

When was TR 351 over Trib to Pigeon CR built?

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

What condition is TR 351 over Trib to Pigeon 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 August 2024.

How much traffic does TR 351 over Trib to Pigeon CR carry?

About 25 vehicles per day (2022 count).

How long is TR 351 over Trib to Pigeon CR?

The structure is 56 ft (17.1 m) long with a longest span of 20 ft (6.1 m) and a deck 22 ft wide.

Who owns TR 351 over Trib to Pigeon CR?

It is owned by the Town or Township Highway Agency.