US Bridges

Rockton Ave over NW Drainageway

Fair

Winnebago County, Illinois · 0.3 MI S of Halsted · Structure no. 101600500000000

Built
1962
63 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
29 ft
1 main span
Daily traffic
8,850
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Rockton Ave over NW Drainageway is a steel stringer/multi-beam or girder carrying Rockton Ave over NW Drainageway in Winnebago County, Illinois. It was built in 1962, so it is 63 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 6 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 8,850 vehicles a day, roughly 2% of them trucks, projected to reach 12,221 by 2046. The structure is 29 ft (8.8 m) long and 64 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesRockton Ave
CrossesNW Drainageway
Location0.3 MI S of Halsted
CountyWinnebago County
StateIllinois
Coordinates42.30659, -89.09686
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating41.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length29 ft (8.8 m)
Longest span28 ft (8.5 m)
Deck width64 ft (19.5 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,850 (2022)
Projected traffic12,221 by 2046
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
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 Rockton Ave over NW Drainageway built?

It was built in 1962, making it 63 years old in 2025.

What condition is Rockton Ave over NW Drainageway 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 July 2023.

How much traffic does Rockton Ave over NW Drainageway carry?

About 8,850 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Rockton Ave over NW Drainageway?

The structure is 29 ft (8.8 m) long with a longest span of 28 ft (8.5 m) and a deck 64 ft wide.

Who owns Rockton Ave over NW Drainageway?

It is owned by the City or Municipal Highway Agency.