US Bridges

N 3rd ST Ext to 2N over SB Ramp to N 6th ST

Poor

Winnebago County, Illinois · Whitman Interchange · Structure no. 101620200000000

Built
1963
62 years old
Condition
Poor
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
206 ft
3 main spans
Daily traffic
8,200
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

N 3rd ST Ext to 2N over SB Ramp to N 6th ST is a steel continuous stringer/multi-beam or girder carrying N 3rd ST Ext to 2N over SB Ramp to N 6th ST in Winnebago County, Illinois. It was built in 1963, so it is 62 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 8,200 vehicles a day, roughly 5% of them trucks, projected to reach 8,080 by 2046. The structure is 206 ft (62.8 m) long and 37 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesN 3rd ST Ext to 2N
CrossesSB Ramp to N 6th ST
LocationWhitman Interchange
RouteState Highway 251
CountyWinnebago County
StateIllinois
Coordinates42.27277, -89.08192
Functional classUrban Other Principal Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating29.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length206 ft (62.8 m)
Longest span87 ft (26.5 m)
Deck width37 ft (11.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,200 (2023)
Projected traffic8,080 by 2046
Trucks5%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 N 3rd ST Ext to 2N over SB Ramp to N 6th ST built?

It was built in 1963, making it 62 years old in 2025.

What condition is N 3rd ST Ext to 2N over SB Ramp to N 6th ST in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2023.

How much traffic does N 3rd ST Ext to 2N over SB Ramp to N 6th ST carry?

About 8,200 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is N 3rd ST Ext to 2N over SB Ramp to N 6th ST?

The structure is 206 ft (62.8 m) long with a longest span of 87 ft (26.5 m) and a deck 37 ft wide.

Who owns N 3rd ST Ext to 2N over SB Ramp to N 6th ST?

It is owned by the City or Municipal Highway Agency.