US Bridges

Ill 177 / Il 158 over Creek

FairPosted for load

St. Clair County, Illinois · 1.5 MI E of Il 159 · Structure no. 082005600000000

Built
1959
66 years old
Condition
Fair
inspected July 2024
Type
Slab
Concrete Continuous
Length
41 ft
2 main spans
Daily traffic
7,300
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 177 / Il 158 over Creek is a concrete continuous slab carrying Ill 177 / Il 158 over Creek in St. Clair County, Illinois. It was built in 1959, so it is 66 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. Its operating status is: posted for load restriction.

It carries about 7,300 vehicles a day, roughly 6% of them trucks, projected to reach 6,515 by 2046. The structure is 41 ft (12.5 m) long and 46 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesIll 177 / Il 158
CrossesCreek
Location1.5 MI E of Il 159
RouteState Highway 158
CountySt. Clair County
StateIllinois
Coordinates38.50491, -89.95561
Functional classUrban Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating48.6 US tons
Inventory rating28.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length41 ft (12.5 m)
Longest span20 ft (6.1 m)
Deck width46 ft (14.1 m)
Roadway width43 ft (13.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,300 (2023)
Projected traffic6,515 by 2046
Trucks6%
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

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 177 / Il 158 over Creek built?

It was built in 1959, making it 66 years old in 2025.

What condition is Ill 177 / Il 158 over Creek 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 July 2024.

How much traffic does Ill 177 / Il 158 over Creek carry?

About 7,300 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is Ill 177 / Il 158 over Creek?

The structure is 41 ft (12.5 m) long with a longest span of 20 ft (6.1 m) and a deck 46 ft wide.

Who owns Ill 177 / Il 158 over Creek?

It is owned by the State Highway Agency.