US Bridges

Argyle RD over Stream

Fair

Winnebago County, Illinois · 0.7 MI S of Ill 173 · Structure no. 101203100000000

Built
1983
42 years old
Condition
Fair
inspected March 2023
Type
Culvert
Concrete
Length
29 ft
3 main spans
Daily traffic
5,750
2023 count
Owner
State
State Highway Agency

About this bridge

Argyle RD over Stream is a concrete culvert carrying Argyle RD over Stream in Winnebago County, Illinois. It was built in 1983, so it is 42 years old, younger 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 5 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 5,750 vehicles a day, roughly 2% of them trucks, projected to reach 6,060 by 2046. The structure is 29 ft (8.8 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesArgyle RD
CrossesStream
Location0.7 MI S of Ill 173
CountyWinnebago County
StateIllinois
Coordinates42.36104, -88.94111
Functional classUrban Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length29 ft (8.8 m)
Longest span9 ft (2.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,750 (2023)
Projected traffic6,060 by 2046
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

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 Argyle RD over Stream built?

It was built in 1983, making it 42 years old in 2025.

What condition is Argyle RD over Stream 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 March 2023.

How much traffic does Argyle RD over Stream carry?

About 5,750 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Argyle RD over Stream?

The structure is 29 ft (8.8 m) long with a longest span of 9 ft (2.7 m).

Who owns Argyle RD over Stream?

It is owned by the State Highway Agency.