US Bridges

Riess Roadtr 129 over Rayhill Slough

Fair

St. Clair County, Illinois · 0.1 MI E Woodland RD · Structure no. 082412000000000

Built
1987
38 years old
Condition
Fair
inspected February 2023
Type
Culvert
Steel
Length
26 ft
1 main span
Daily traffic
50
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Riess Roadtr 129 over Rayhill Slough is a steel culvert carrying Riess Roadtr 129 over Rayhill Slough in St. Clair County, Illinois. It was built in 1987, so it is 38 years old, younger 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 6 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 50 vehicles a day, roughly 20% of them trucks, projected to reach 51 by 2046. The structure is 26 ft (7.9 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesRiess Roadtr 129
CrossesRayhill Slough
Location0.1 MI E Woodland RD
RouteCounty Highway 0
CountySt. Clair County
StateIllinois
Coordinates38.49516, -89.73036
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span26 ft (7.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2023)
Projected traffic51 by 2046
Trucks20%
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 Riess Roadtr 129 over Rayhill Slough built?

It was built in 1987, making it 38 years old in 2025.

What condition is Riess Roadtr 129 over Rayhill Slough 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 February 2023.

How much traffic does Riess Roadtr 129 over Rayhill Slough carry?

About 50 vehicles per day (2023 count), of which roughly 20% are trucks.

How long is Riess Roadtr 129 over Rayhill Slough?

The structure is 26 ft (7.9 m) long with a longest span of 26 ft (7.9 m).

Who owns Riess Roadtr 129 over Rayhill Slough?

It is owned by the Town or Township Highway Agency.