US Bridges

US 45 over Big Four Ditch

Good

Ford County, Illinois · 3.04 M S of Il 9 · Structure no. 027010400000000

Built
2018
7 years old
Condition
Good
inspected March 2021
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
193 ft
3 main spans
Daily traffic
3,200
2023 count
Owner
State
State Highway Agency

About this bridge

US 45 over Big Four Ditch is a steel continuous stringer/multi-beam or girder carrying US 45 over Big Four Ditch in Ford County, Illinois. It was built in 2018, so it is 7 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 3,200 vehicles a day, roughly 6% of them trucks, projected to reach 2,778 by 2046. The structure is 193 ft (58.8 m) long and 39 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesUS 45
CrossesBig Four Ditch
Location3.04 M S of Il 9
RouteU.S. Route 45
Coordinates40.41854, -88.11321
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 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 rating67.5 US tons
Inventory rating52.1 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length193 ft (58.8 m)
Longest span75 ft (22.8 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,200 (2023)
Projected traffic2,778 by 2046
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Big Four Ditch built?

It was built in 2018, making it 7 years old in 2025.

What condition is US 45 over Big Four Ditch 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 March 2021.

How much traffic does US 45 over Big Four Ditch carry?

About 3,200 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is US 45 over Big Four Ditch?

The structure is 193 ft (58.8 m) long with a longest span of 75 ft (22.8 m) and a deck 39 ft wide.

Who owns US 45 over Big Four Ditch?

It is owned by the State Highway Agency.