US Bridges

TR 298A over Rayhill Slough

Poor

St. Clair County, Illinois · 1M N Ill 177 · Structure no. 082408800000000

Built
1956
69 years old
Condition
Poor
inspected February 2023
Type
Culvert
Steel
Length
34 ft
2 main spans
Daily traffic
175
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 298A over Rayhill Slough is a steel culvert carrying TR 298A over Rayhill Slough in St. Clair County, Illinois. It was built in 1956, so it is 69 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 175 vehicles a day, roughly 10% of them trucks, projected to reach 227 by 2046. The structure is 34 ft (10.5 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesTR 298A
CrossesRayhill Slough
Location1M N Ill 177
RouteCounty Highway 0
CountySt. Clair County
StateIllinois
Coordinates38.49392, -89.73252
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionFebruary 2023
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
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.5 US tons
Inventory rating43.5 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadUnknown
Structure length34 ft (10.5 m)
Longest span15 ft (4.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic175 (2023)
Projected traffic227 by 2046
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 298A over Rayhill Slough built?

It was built in 1956, making it 69 years old in 2025.

What condition is TR 298A over Rayhill Slough 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 February 2023.

How much traffic does TR 298A over Rayhill Slough carry?

About 175 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is TR 298A over Rayhill Slough?

The structure is 34 ft (10.5 m) long with a longest span of 15 ft (4.6 m).

Who owns TR 298A over Rayhill Slough?

It is owned by the Town or Township Highway Agency.