US Bridges

Northern Ave over Nettle Creek

Poor

Grundy County, Illinois · Nort Ave Ov Nettle C · Structure no. 032700700000000

Built
1969
56 years old
Condition
Poor
inspected June 2023
Type
Channel Beam
Concrete
Length
35 ft
1 main span
Daily traffic
525
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Northern Ave over Nettle Creek is a concrete channel beam carrying Northern Ave over Nettle Creek in Grundy County, Illinois. It was built in 1969, so it is 56 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 3 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 525 vehicles a day, roughly 13% of them trucks, projected to reach 840 by 2046. The structure is 35 ft (10.7 m) long and 41 ft wide.

CarriesNorthern Ave
CrossesNettle Creek
LocationNort Ave Ov Nettle C
RouteCity Street 0
Coordinates41.36382, -88.4296
Functional classUrban Local

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
Deck7 GoodSome minor problems.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating39.7 US tons
Inventory rating28.2 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length35 ft (10.7 m)
Longest span33 ft (10.1 m)
Deck width41 ft (12.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic525 (2024)
Projected traffic840 by 2046
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Northern Ave over Nettle Creek built?

It was built in 1969, making it 56 years old in 2025.

What condition is Northern Ave over Nettle Creek 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 June 2023.

How much traffic does Northern Ave over Nettle Creek carry?

About 525 vehicles per day (2024 count), of which roughly 13% are trucks.

How long is Northern Ave over Nettle Creek?

The structure is 35 ft (10.7 m) long with a longest span of 33 ft (10.1 m) and a deck 41 ft wide.

Who owns Northern Ave over Nettle Creek?

It is owned by the City or Municipal Highway Agency.