US Bridges

Il 146 over Little Grand Pierre

Good

Pope County, Illinois · 3 MI W Hardin County · Structure no. 076003000000000

Built
2013
12 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
95 ft
1 main span
Daily traffic
900
2023 count
Owner
State
State Highway Agency

About this bridge

Il 146 over Little Grand Pierre is a steel stringer/multi-beam or girder carrying Il 146 over Little Grand Pierre in Pope County, Illinois. It was built in 2013, so it is 12 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 900 vehicles a day, roughly 10% of them trucks, projected to reach 1,111 by 2046. The structure is 95 ft (29 m) long and 35 ft wide. If it were closed, the detour would be 49.7 mi (80 km).

CarriesIl 146
CrossesLittle Grand Pierre
Location3 MI W Hardin County
RouteState Highway 146
Coordinates37.44533, -88.46484
Functional classRural 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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.6 US tons
Inventory rating64.3 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length95 ft (29 m)
Longest span92 ft (28 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic900 (2023)
Projected traffic1,111 by 2046
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed49.7 mi (80 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 146 over Little Grand Pierre built?

It was built in 2013, making it 12 years old in 2025.

What condition is Il 146 over Little Grand Pierre 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 Il 146 over Little Grand Pierre carry?

About 900 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Il 146 over Little Grand Pierre?

The structure is 95 ft (29 m) long with a longest span of 92 ft (28 m) and a deck 35 ft wide.

Who owns Il 146 over Little Grand Pierre?

It is owned by the State Highway Agency.