US Bridges

US 24/ Il 78 over Big Sister CR

Good

Fulton County, Illinois · 1.7 MI SW Il 78 Wye · Structure no. 029007400000000

Built
2014
11 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
94 ft
1 main span
Daily traffic
3,750
2023 count
Owner
State
State Highway Agency

About this bridge

US 24/ Il 78 over Big Sister CR is a steel stringer/multi-beam or girder carrying US 24/ Il 78 over Big Sister CR in Fulton County, Illinois. It was built in 2014, so it is 11 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 3,750 vehicles a day, roughly 8% of them trucks, projected to reach 3,838 by 2046. The structure is 94 ft (28.5 m) long and 39 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesUS 24/ Il 78
CrossesBig Sister CR
Location1.7 MI SW Il 78 Wye
RouteU.S. Route 24
CountyFulton County
StateIllinois
Coordinates40.39831, -90.06373
Functional classRural Principal Arterial - Other

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating87.2 US tons
Inventory rating67.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length94 ft (28.5 m)
Longest span91 ft (27.7 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,750 (2023)
Projected traffic3,838 by 2046
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 US 24/ Il 78 over Big Sister CR built?

It was built in 2014, making it 11 years old in 2025.

What condition is US 24/ Il 78 over Big Sister CR 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 November 2024.

How much traffic does US 24/ Il 78 over Big Sister CR carry?

About 3,750 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is US 24/ Il 78 over Big Sister CR?

The structure is 94 ft (28.5 m) long with a longest span of 91 ft (27.7 m) and a deck 39 ft wide.

Who owns US 24/ Il 78 over Big Sister CR?

It is owned by the State Highway Agency.