US Bridges

TR 228 over Trib to Spoon River

Poor

Knox County, Illinois · N.CTR-27-T10NR3E · Structure no. 048313700000000

Built
1969
56 years old
Condition
Poor
inspected January 2024
Type
Channel Beam
Concrete
Length
32 ft
1 main span
Daily traffic
75
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 228 over Trib to Spoon River is a concrete channel beam carrying TR 228 over Trib to Spoon River in Knox County, Illinois. It was built in 1969, so it is 56 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 75 vehicles a day, roughly 13% of them trucks, projected to reach 76 by 2046. The structure is 32 ft (9.8 m) long and 23 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesTR 228
CrossesTrib to Spoon River
LocationN.CTR-27-T10NR3E
RouteCounty Highway 0
Coordinates40.82939, -90.14787
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be 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 alignment7: Better than present minimum criteria
Operating rating55 US tons
Inventory rating32.8 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 15
Structure length32 ft (9.8 m)
Longest span31 ft (9.4 m)
Deck width23 ft (7 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2022)
Projected traffic76 by 2046
Trucks13%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was TR 228 over Trib to Spoon River built?

It was built in 1969, making it 56 years old in 2025.

What condition is TR 228 over Trib to Spoon River 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 228 over Trib to Spoon River carry?

About 75 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is TR 228 over Trib to Spoon River?

The structure is 32 ft (9.8 m) long with a longest span of 31 ft (9.4 m) and a deck 23 ft wide.

Who owns TR 228 over Trib to Spoon River?

It is owned by the Town or Township Highway Agency.