US Bridges

Patterson Road over Unnamed Creek

Fair

Winnebago County, Illinois · 0.3 MI N of Rt 75 · Structure no. 101511400000000

Built
1976
49 years old
Condition
Fair
inspected June 2024
Type
Culvert
Concrete
Length
25 ft
2 main spans
Daily traffic
275
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Patterson Road over Unnamed Creek is a concrete culvert carrying Patterson Road over Unnamed Creek in Winnebago County, Illinois. It was built in 1976, so it is 49 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 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 275 vehicles a day, roughly 16% of them trucks, projected to reach 379 by 2046. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesPatterson Road
CrossesUnnamed Creek
Location0.3 MI N of Rt 75
RouteCounty Highway 0
CountyWinnebago County
StateIllinois
Coordinates42.42274, -89.34124
Functional classRural Local

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.5 US tons
Inventory rating49.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic275 (2022)
Projected traffic379 by 2046
Trucks16%
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

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 Patterson Road over Unnamed Creek built?

It was built in 1976, making it 49 years old in 2025.

What condition is Patterson Road over Unnamed Creek 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 June 2024.

How much traffic does Patterson Road over Unnamed Creek carry?

About 275 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is Patterson Road over Unnamed Creek?

The structure is 25 ft (7.6 m) long with a longest span of 10 ft (3 m).

Who owns Patterson Road over Unnamed Creek?

It is owned by the Town or Township Highway Agency.