US Bridges

Ill 8 over Hickory Creek

Good

Knox County, Illinois · 2 MI SE of Maquon · Structure no. 048009400000000

Built
2022
3 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
78 ft
1 main span
Daily traffic
900
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 8 over Hickory Creek is a steel stringer/multi-beam or girder carrying Ill 8 over Hickory Creek in Knox County, Illinois. It was built in 2022, so it is 3 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 900 vehicles a day, roughly 14% of them trucks, projected to reach 859 by 2046. The structure is 78 ft (23.7 m) long and 32 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesIll 8
CrossesHickory Creek
Location2 MI SE of Maquon
RouteState Highway 8
CountyKnox County
StateIllinois
Coordinates40.77875, -90.13555
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.3 US tons
Inventory rating53.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length78 ft (23.7 m)
Longest span74 ft (22.7 m)
Deck width32 ft (9.8 m)
Roadway width10 ft (2.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic900 (2023)
Projected traffic859 by 2046
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 8 over Hickory Creek built?

It was built in 2022, making it 3 years old in 2025.

What condition is Ill 8 over Hickory 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 May 2023.

How much traffic does Ill 8 over Hickory Creek carry?

About 900 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is Ill 8 over Hickory Creek?

The structure is 78 ft (23.7 m) long with a longest span of 74 ft (22.7 m) and a deck 32 ft wide.

Who owns Ill 8 over Hickory Creek?

It is owned by the State Highway Agency.