US Bridges

I- 55 SB over Grant Creek

Fair

Will County, Illinois · 5.6 M S of US 6 · Structure no. 099000500000000

Built
1956
69 years old, rebuilt 2019
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
178 ft
3 main spans
Daily traffic
26,450
2024 count
Owner
State
State Highway Agency

About this bridge

I- 55 SB over Grant Creek is a steel continuous stringer/multi-beam or girder carrying I- 55 SB over Grant Creek in Will County, Illinois. It was built in 1956 and reconstructed in 2019, so it is 69 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 26,450 vehicles a day, roughly 6% of them trucks, projected to reach 31,104 by 2046. The structure is 178 ft (54.2 m) long and 43 ft wide. If it were closed, the detour would be 26.7 mi (43 km).

Location

Open in Google Maps
CarriesI- 55 SB
CrossesGrant Creek
Location5.6 M S of US 6
RouteInterstate 55
CountyWill County
StateIllinois
Coordinates41.37572, -88.19236
Functional classUrban 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 alignment7: Better than present minimum criteria
Operating rating31.4 US tons
Inventory rating24.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length178 ft (54.2 m)
Longest span70 ft (21.3 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,450 (2024)
Projected traffic31,104 by 2046
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed26.7 mi (43 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- 55 SB over Grant Creek built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 2019.

What condition is I- 55 SB over Grant 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 February 2023.

How much traffic does I- 55 SB over Grant Creek carry?

About 26,450 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is I- 55 SB over Grant Creek?

The structure is 178 ft (54.2 m) long with a longest span of 70 ft (21.3 m) and a deck 43 ft wide.

Who owns I- 55 SB over Grant Creek?

It is owned by the State Highway Agency.