US Bridges

Old Il 121 over Prairie Creek

Good

Logan County, Illinois · 1.0 MI NW Hartsburg · Structure no. 054250300000000

Built
2004
21 years old
Condition
Good
inspected December 2024
Type
Culvert
Concrete
Length
30 ft
2 main spans
Daily traffic
700
2022 count
Owner
State
State Highway Agency

About this bridge

Old Il 121 over Prairie Creek is a concrete culvert carrying Old Il 121 over Prairie Creek in Logan County, Illinois. It was built in 2004, so it is 21 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 700 vehicles a day, roughly 11% of them trucks, projected to reach 814 by 2046. The structure is 30 ft (9.1 m) long. If it were closed, the detour would be 5 mi (8 km).

CarriesOld Il 121
CrossesPrairie Creek
Location1.0 MI NW Hartsburg
RouteCounty Highway 0
Coordinates40.26556, -89.45141
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionDecember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.3 US tons
Inventory rating42.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span13 ft (4.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic700 (2022)
Projected traffic814 by 2046
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Old Il 121 over Prairie Creek built?

It was built in 2004, making it 21 years old in 2025.

What condition is Old Il 121 over Prairie 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 December 2024.

How much traffic does Old Il 121 over Prairie Creek carry?

About 700 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is Old Il 121 over Prairie Creek?

The structure is 30 ft (9.1 m) long with a longest span of 13 ft (4.1 m).

Who owns Old Il 121 over Prairie Creek?

It is owned by the State Highway Agency.