US Bridges

Linden RD over I 39 SB Ramp

Good

Winnebago County, Illinois · Over 39 SB Ramp · Structure no. 101021600000000

Built
2023
2 years old
Condition
Good
inspected January 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
147 ft
1 main span
Daily traffic
12,600
2023 count
Owner
State
State Highway Agency

About this bridge

Linden RD over I 39 SB Ramp is a prestressed concrete stringer/multi-beam or girder carrying Linden RD over I 39 SB Ramp 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 12,600 vehicles a day, roughly 38% of them trucks, projected to reach 24,100 by 2046. The structure is 147 ft (44.8 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesLinden RD
CrossesI 39 SB Ramp
LocationOver 39 SB Ramp
RouteInterstate 39
CountyWinnebago County
StateIllinois
Coordinates42.21686, -89.01238
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 inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation9: Superior to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80 US tons
Inventory rating57.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length147 ft (44.8 m)
Longest span0 ft (0 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,600 (2023)
Projected traffic24,100 by 2046
Trucks38%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Linden RD over I 39 SB Ramp built?

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

What condition is Linden RD over I 39 SB Ramp 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 January 2024.

How much traffic does Linden RD over I 39 SB Ramp carry?

About 12,600 vehicles per day (2023 count), of which roughly 38% are trucks.

How long is Linden RD over I 39 SB Ramp?

The structure is 147 ft (44.8 m) long and a deck 43 ft wide.

Who owns Linden RD over I 39 SB Ramp?

It is owned by the State Highway Agency.