US Bridges

FAS 840 Jefferson over Silver Creek

Good

St. Clair County, Illinois · 2.5 MI West Ill 4 · Structure no. 082309200000000

Built
1996
29 years old
Condition
Good
inspected March 2022
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
273 ft
3 main spans
Daily traffic
3,950
2023 count
Owner
County
County Highway Agency

About this bridge

FAS 840 Jefferson over Silver Creek is a steel continuous stringer/multi-beam or girder carrying FAS 840 Jefferson over Silver Creek in St. Clair County, Illinois. It was built in 1996, so it is 29 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,950 vehicles a day, roughly 7% of them trucks, projected to reach 606 by 2046. The structure is 273 ft (83.1 m) long and 31 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

Open in Google Maps
CarriesFAS 840 Jefferson
CrossesSilver Creek
Location2.5 MI West Ill 4
RouteCounty Highway 0
CountySt. Clair County
StateIllinois
Coordinates38.4393, -89.83663
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length273 ft (83.1 m)
Longest span100 ft (30.5 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,950 (2023)
Projected traffic606 by 2046
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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 FAS 840 Jefferson over Silver Creek built?

It was built in 1996, making it 29 years old in 2025.

What condition is FAS 840 Jefferson over Silver Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2022.

How much traffic does FAS 840 Jefferson over Silver Creek carry?

About 3,950 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is FAS 840 Jefferson over Silver Creek?

The structure is 273 ft (83.1 m) long with a longest span of 100 ft (30.5 m) and a deck 31 ft wide.

Who owns FAS 840 Jefferson over Silver Creek?

It is owned by the County Highway Agency.