US Bridges

Il 177 over Loop Creek

Good

St. Clair County, Illinois · 1 MI W. JCT W/158 · Structure no. 082027200000000

Built
2007
18 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
106 ft
3 main spans
Daily traffic
5,600
2023 count
Owner
State
State Highway Agency

About this bridge

Il 177 over Loop Creek is a steel continuous stringer/multi-beam or girder carrying Il 177 over Loop Creek in St. Clair County, Illinois. It was built in 2007, so it is 18 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 5,600 vehicles a day, roughly 6% of them trucks, projected to reach 5,909 by 2046. The structure is 106 ft (32.4 m) long and 40 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesIl 177
CrossesLoop Creek
Location1 MI W. JCT W/158
RouteState Highway 158
CountySt. Clair County
StateIllinois
Coordinates38.50468, -89.88317
Functional classUrban Minor 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 inspectionJuly 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating90.7 US tons
Inventory rating54.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length106 ft (32.4 m)
Longest span50 ft (15.2 m)
Deck width40 ft (12.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,600 (2023)
Projected traffic5,909 by 2046
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 Il 177 over Loop Creek built?

It was built in 2007, making it 18 years old in 2025.

What condition is Il 177 over Loop 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 July 2024.

How much traffic does Il 177 over Loop Creek carry?

About 5,600 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is Il 177 over Loop Creek?

The structure is 106 ft (32.4 m) long with a longest span of 50 ft (15.2 m) and a deck 40 ft wide.

Who owns Il 177 over Loop Creek?

It is owned by the State Highway Agency.