US Bridges

Il 4 over Trib to Silver Creek

Good

St. Clair County, Illinois · 1/2 MI South of I-64 · Structure no. 082029600000000

Built
1995
30 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
177 ft
3 main spans
Daily traffic
7,800
2023 count
Owner
State
State Highway Agency

About this bridge

Il 4 over Trib to Silver Creek is a prestressed concrete stringer/multi-beam or girder carrying Il 4 over Trib to Silver Creek in St. Clair County, Illinois. It was built in 1995, so it is 30 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 7,800 vehicles a day, roughly 8% of them trucks, projected to reach 4,166 by 2046. The structure is 177 ft (54 m) long and 65 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesIl 4
CrossesTrib to Silver Creek
Location1/2 MI South of I-64
RouteState Highway 4
CountySt. Clair County
StateIllinois
Coordinates38.54281, -89.80431
Functional classUrban Other Principal Arterial

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 inspectionOctober 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.5 US tons
Inventory rating40.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length177 ft (54 m)
Longest span59 ft (18 m)
Deck width65 ft (19.9 m)
Roadway width62 ft (18.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,800 (2023)
Projected traffic4,166 by 2046
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Il 4 over Trib to Silver Creek built?

It was built in 1995, making it 30 years old in 2025.

What condition is Il 4 over Trib to 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 October 2023.

How much traffic does Il 4 over Trib to Silver Creek carry?

About 7,800 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is Il 4 over Trib to Silver Creek?

The structure is 177 ft (54 m) long with a longest span of 59 ft (18 m) and a deck 65 ft wide.

Who owns Il 4 over Trib to Silver Creek?

It is owned by the State Highway Agency.