I 57 NB over Gun Creek

Fair

Franklin County, Illinois · 1.4 MI N Ill 154 · Structure no. 028001300000000

Built: 1962; 63 years old, rebuilt 1993
Condition: Fair; inspected July 2023
Type: Stringer/Multi-beam or Girder; Steel Continuous
Length: 163 ft; 3 main spans
Daily traffic: 17,850; 2024 count
Owner: State; State Highway Agency

About this bridge

I 57 NB over Gun Creek is a steel continuous stringer/multi-beam or girder carrying I 57 NB over Gun Creek in Franklin County, Illinois. It was built in 1962 and reconstructed in 1993, 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 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 17,850 vehicles a day, roughly 48% of them trucks, projected to reach 20,049 by 2046. The structure is 163 ft (49.7 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

No coordinates are recorded for this structure.

CarriesI 57 NB

CrossesGun Creek

Location1.4 MI N Ill 154

RouteInterstate 57

CountyFranklin County

StateIllinois

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.

Component	Rating	Meaning
Deck	6 Satisfactory	Structural elements show some minor deterioration.
Superstructure	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure	6 Satisfactory	Structural elements show some minor deterioration.
Channel and channel protection	7 Good	Some minor problems.

Last inspectionJuly 2023

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour within limits of footing or piles

Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is

Deck geometry7: Better than present minimum criteria

Waterway adequacy8: Equal to present desirable criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating98.2 US tons

Inventory rating59 US tons

Structure

Structure typeStringer/Multi-beam or Girder

MaterialSteel Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadHS 20 + Mod

Structure length163 ft (49.7 m)

Longest span53 ft (16.2 m)

Deck width43 ft (13.2 m)

Roadway width40 ft (12.2 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,850 (2024)

Projected traffic20,049 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 NB over Gun Creek built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 1993.

What condition is I 57 NB over Gun Creek 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 July 2023.

How much traffic does I 57 NB over Gun Creek carry?

About 17,850 vehicles per day (2024 count), of which roughly 48% are trucks.

How long is I 57 NB over Gun Creek?

The structure is 163 ft (49.7 m) long with a longest span of 53 ft (16.2 m) and a deck 43 ft wide.

Who owns I 57 NB over Gun Creek?

It is owned by the State Highway Agency.