US Bridges

I-39 Ramp 389 over I-39 & US 51 SB

Good

Winnebago County, Illinois · 0.35 MI S of US 20 · Structure no. 101020400000000

Built
2023
2 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
351 ft
3 main spans
Daily traffic
4,550
2022 count
Owner
State
State Highway Agency

About this bridge

I-39 Ramp 389 over I-39 & US 51 SB is a steel stringer/multi-beam or girder carrying I-39 Ramp 389 over I-39 & US 51 SB in Winnebago County, Illinois. It was built in 2023, so it is 2 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,550 vehicles a day, roughly 20% of them trucks, projected to reach 4,747 by 2046. The structure is 351 ft (107 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-39 Ramp 389
CrossesI-39 & US 51 SB
Location0.35 MI S of US 20
CountyWinnebago County
StateIllinois
Coordinates42.21501, -89.01133
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation9: Superior to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.6 US tons
Inventory rating57.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadHS 20
Structure length351 ft (107 m)
Longest span0 ft (0 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,550 (2022)
Projected traffic4,747 by 2046
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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-39 Ramp 389 over I-39 & US 51 SB built?

It was built in 2023, making it 2 years old in 2025.

What condition is I-39 Ramp 389 over I-39 & US 51 SB 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 May 2024.

How much traffic does I-39 Ramp 389 over I-39 & US 51 SB carry?

About 4,550 vehicles per day (2022 count), of which roughly 20% are trucks.

How long is I-39 Ramp 389 over I-39 & US 51 SB?

The structure is 351 ft (107 m) long and a deck 43 ft wide.

Who owns I-39 Ramp 389 over I-39 & US 51 SB?

It is owned by the State Highway Agency.