US Bridges

TR-406 over Jerry Slough

Fair

White County, Illinois · 2 MI S Phillpstown · Structure no. 097315900000000

Built
1964
61 years old
Condition
Fair
inspected February 2024
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
50
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR-406 over Jerry Slough is a concrete culvert carrying TR-406 over Jerry Slough in White County, Illinois. It was built in 1964, so it is 61 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 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 38% of them trucks, projected to reach 51 by 2046. The structure is 22 ft (6.7 m) long and 24 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesTR-406
CrossesJerry Slough
Location2 MI S Phillpstown
RouteCounty Highway 0
Coordinates38.11461, -88.01363
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 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 15
Structure length22 ft (6.7 m)
Longest span11 ft (3.3 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2024)
Projected traffic51 by 2046
Trucks38%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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-406 over Jerry Slough built?

It was built in 1964, making it 61 years old in 2025.

What condition is TR-406 over Jerry 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 2024.

How much traffic does TR-406 over Jerry Slough carry?

About 50 vehicles per day (2024 count), of which roughly 38% are trucks.

How long is TR-406 over Jerry Slough?

The structure is 22 ft (6.7 m) long with a longest span of 11 ft (3.3 m) and a deck 24 ft wide.

Who owns TR-406 over Jerry Slough?

It is owned by the Town or Township Highway Agency.