US Bridges

Patterson Road over N Br Otter Creek

FairPosted for load

Winnebago County, Illinois · 0.5 MI S Rock Grove · Structure no. 101505000000000

Built
1968
57 years old
Condition
Fair
inspected May 2023
Type
Culvert
Concrete
Length
56 ft
4 main spans
Daily traffic
225
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Patterson Road over N Br Otter Creek is a concrete culvert carrying Patterson Road over N Br Otter Creek in Winnebago County, Illinois. It was built in 1968, so it is 57 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. Its operating status is: posted for load restriction.

It carries about 225 vehicles a day, roughly 19% of them trucks, projected to reach 152 by 2046. The structure is 56 ft (17.2 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesPatterson Road
CrossesN Br Otter Creek
Location0.5 MI S Rock Grove
RouteCounty Highway 0
CountyWinnebago County
StateIllinois
Coordinates42.44796, -89.34207
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.4 US tons
Inventory rating25 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 15
Structure length56 ft (17.2 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic225 (2022)
Projected traffic152 by 2046
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 N Br Otter Creek built?

It was built in 1968, making it 57 years old in 2025.

What condition is Patterson Road over N Br Otter 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 May 2023.

How much traffic does Patterson Road over N Br Otter Creek carry?

About 225 vehicles per day (2022 count), of which roughly 19% are trucks.

How long is Patterson Road over N Br Otter Creek?

The structure is 56 ft (17.2 m) long with a longest span of 14 ft (4.3 m).

Who owns Patterson Road over N Br Otter Creek?

It is owned by the Town or Township Highway Agency.