US Bridges

Jefferson Rd/ Ch 2 over Jackson Slough

Fair

St. Clair County, Illinois · 1.0 MI E Ill 4 · Structure no. 082306400000000

Built
1978
47 years old
Condition
Fair
inspected February 2024
Type
Culvert
Steel
Length
35 ft
2 main spans
Daily traffic
200
2023 count
Owner
County
County Highway Agency

About this bridge

Jefferson Rd/ Ch 2 over Jackson Slough is a steel culvert carrying Jefferson Rd/ Ch 2 over Jackson Slough in St. Clair County, Illinois. It was built in 1978, so it is 47 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 5 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 200 vehicles a day, roughly 22% of them trucks, projected to reach 101 by 2046. The structure is 35 ft (10.7 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesJefferson Rd/ Ch 2
CrossesJackson Slough
Location1.0 MI E Ill 4
RouteCounty Highway 0
CountySt. Clair County
StateIllinois
Coordinates38.43833, -89.77508
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 protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: 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 rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadUnknown
Structure length35 ft (10.7 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 traffic200 (2023)
Projected traffic101 by 2046
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Jefferson Rd/ Ch 2 over Jackson Slough built?

It was built in 1978, making it 47 years old in 2025.

What condition is Jefferson Rd/ Ch 2 over Jackson 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 Jefferson Rd/ Ch 2 over Jackson Slough carry?

About 200 vehicles per day (2023 count), of which roughly 22% are trucks.

How long is Jefferson Rd/ Ch 2 over Jackson Slough?

The structure is 35 ft (10.7 m) long with a longest span of 15 ft (4.6 m).

Who owns Jefferson Rd/ Ch 2 over Jackson Slough?

It is owned by the County Highway Agency.