US Bridges

Il 54 over Il 121 & Ic RR

Fair

Logan County, Illinois · SE Edge Mt. Pulaski · Structure no. 054003000000000

Built
1971
54 years old
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Single or Spread
Steel Continuous
Length
302 ft
4 main spans
Daily traffic
1,100
2023 count
Owner
State
State Highway Agency

About this bridge

Il 54 over Il 121 & Ic RR is a steel continuous box beam or girders - single or spread carrying Il 54 over Il 121 & Ic RR in Logan County, Illinois. It was built in 1971, so it is 54 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 1,100 vehicles a day, roughly 15% of them trucks, projected to reach 1,260 by 2046. The structure is 302 ft (92 m) long and 46 ft wide. If it were closed, the detour would be 34.2 mi (55 km).

Location

Open in Google Maps
CarriesIl 54
CrossesIl 121 & Ic RR
LocationSE Edge Mt. Pulaski
RouteState Highway 54
CountyLogan County
StateIllinois
Coordinates40.00095, -89.27239
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating81.5 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length302 ft (92 m)
Longest span90 ft (27.4 m)
Deck width46 ft (14.1 m)
Roadway width43 ft (13.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,100 (2023)
Projected traffic1,260 by 2046
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed34.2 mi (55 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Il 54 over Il 121 & Ic RR built?

It was built in 1971, making it 54 years old in 2025.

What condition is Il 54 over Il 121 & Ic RR in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2023.

How much traffic does Il 54 over Il 121 & Ic RR carry?

About 1,100 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is Il 54 over Il 121 & Ic RR?

The structure is 302 ft (92 m) long with a longest span of 90 ft (27.4 m) and a deck 46 ft wide.

Who owns Il 54 over Il 121 & Ic RR?

It is owned by the State Highway Agency.