US Bridges

I 57 SB over Marcum Branch

Fair

Franklin County, Illinois · 3 MI N Benton · Structure no. 028001100000000

Built
1962
63 years old, rebuilt 1994
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
128 ft
3 main spans
Daily traffic
17,150
2024 count
Owner
State
State Highway Agency

About this bridge

I 57 SB over Marcum Branch is a steel continuous stringer/multi-beam or girder carrying I 57 SB over Marcum Branch in Franklin County, Illinois. It was built in 1962 and reconstructed in 1994, so it is 63 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 6 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 17,150 vehicles a day, roughly 48% of them trucks, projected to reach 19,645 by 2046. The structure is 128 ft (38.9 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 57 SB
CrossesMarcum Branch
Location3 MI N Benton
RouteInterstate 57
Coordinates38.04629, -88.92465
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.2 US tons
Inventory rating46.7 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length128 ft (38.9 m)
Longest span46 ft (13.9 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,150 (2024)
Projected traffic19,645 by 2046
Trucks48%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I 57 SB over Marcum Branch built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 1994.

What condition is I 57 SB over Marcum Branch 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 February 2025.

How much traffic does I 57 SB over Marcum Branch carry?

About 17,150 vehicles per day (2024 count), of which roughly 48% are trucks.

How long is I 57 SB over Marcum Branch?

The structure is 128 ft (38.9 m) long with a longest span of 46 ft (13.9 m) and a deck 43 ft wide.

Who owns I 57 SB over Marcum Branch?

It is owned by the State Highway Agency.