US Bridges

US 45 over Louis Creek

Good

Iroquois County, Illinois · 1.68 MI N of Buckley · Structure no. 038021200000000

Built
2007
18 years old
Condition
Good
inspected January 2021
Type
Slab
Concrete Continuous
Length
102 ft
3 main spans
Daily traffic
1,050
2023 count
Owner
State
State Highway Agency

About this bridge

US 45 over Louis Creek is a concrete continuous slab carrying US 45 over Louis Creek in Iroquois 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,050 vehicles a day, roughly 18% of them trucks, projected to reach 909 by 2046. The structure is 102 ft (31.1 m) long and 35 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesUS 45
CrossesLouis Creek
Location1.68 MI N of Buckley
RouteU.S. Route 45
Coordinates40.62406, -88.02749
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.1 US tons
Inventory rating43.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadHS 20
Structure length102 ft (31.1 m)
Longest span44 ft (13.3 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,050 (2023)
Projected traffic909 by 2046
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 US 45 over Louis Creek built?

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

What condition is US 45 over Louis 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 January 2021.

How much traffic does US 45 over Louis Creek carry?

About 1,050 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is US 45 over Louis Creek?

The structure is 102 ft (31.1 m) long with a longest span of 44 ft (13.3 m) and a deck 35 ft wide.

Who owns US 45 over Louis Creek?

It is owned by the State Highway Agency.