US Bridges

Il 146 over Flat Lick Branch

Good

Pope County, Illinois · 4.2 M E Il 145 · Structure no. 076003200000000

Built
2014
11 years old
Condition
Good
inspected October 2024
Type
Slab
Concrete Continuous
Length
101 ft
3 main spans
Daily traffic
1,250
2023 count
Owner
State
State Highway Agency

About this bridge

Il 146 over Flat Lick Branch is a concrete continuous slab carrying Il 146 over Flat Lick Branch in Pope 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 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 1,250 vehicles a day, roughly 14% of them trucks, projected to reach 1,566 by 2046. The structure is 101 ft (30.8 m) long and 35 ft wide. If it were closed, the detour would be 49.1 mi (79 km).

Location

Open in Google Maps
CarriesIl 146
CrossesFlat Lick Branch
Location4.2 M E Il 145
RouteState Highway 146
CountyPope County
StateIllinois
Coordinates37.37999, -88.60278
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.2 US tons
Inventory rating41.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length101 ft (30.8 m)
Longest span35 ft (10.7 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,250 (2023)
Projected traffic1,566 by 2046
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed49.1 mi (79 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 Flat Lick Branch built?

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

What condition is Il 146 over Flat Lick Branch 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 October 2024.

How much traffic does Il 146 over Flat Lick Branch carry?

About 1,250 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is Il 146 over Flat Lick Branch?

The structure is 101 ft (30.8 m) long with a longest span of 35 ft (10.7 m) and a deck 35 ft wide.

Who owns Il 146 over Flat Lick Branch?

It is owned by the State Highway Agency.