US Bridges

Ill 157 over Trib to Harding Dtch

Fair

St. Clair County, Illinois · 0.08 S Bunkum RD · Structure no. 082201200000000

Built
1966
59 years old
Condition
Fair
inspected June 2023
Type
Culvert
Steel
Length
26 ft
2 main spans
Daily traffic
11,600
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 157 over Trib to Harding Dtch is a steel culvert carrying Ill 157 over Trib to Harding Dtch in St. Clair County, Illinois. It was built in 1966, so it is 59 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 11,600 vehicles a day, roughly 7% of them trucks, projected to reach 10,403 by 2046. The structure is 26 ft (7.9 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesIll 157
CrossesTrib to Harding Dtch
Location0.08 S Bunkum RD
RouteState Highway 157
CountySt. Clair County
StateIllinois
Coordinates38.61984, -90.04061
Functional classUrban Other Principal Arterial

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 inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating77.2 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span11 ft (3.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,600 (2023)
Projected traffic10,403 by 2046
Trucks7%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Ill 157 over Trib to Harding Dtch built?

It was built in 1966, making it 59 years old in 2025.

What condition is Ill 157 over Trib to Harding Dtch 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 June 2023.

How much traffic does Ill 157 over Trib to Harding Dtch carry?

About 11,600 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Ill 157 over Trib to Harding Dtch?

The structure is 26 ft (7.9 m) long with a longest span of 11 ft (3.5 m).

Who owns Ill 157 over Trib to Harding Dtch?

It is owned by the State Highway Agency.