US Bridges

Liddle Road over Unnamed Creek

Fair

Winnebago County, Illinois · 0.3 MI N Roscoe RD · Structure no. 101507300000000

Built
1971
54 years old
Condition
Fair
inspected March 2023
Type
Culvert
Concrete
Length
26 ft
2 main spans
Daily traffic
125
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Liddle Road over Unnamed Creek is a concrete culvert carrying Liddle Road over Unnamed Creek in Winnebago County, Illinois. It was built in 1971, so it is 54 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 125 vehicles a day, roughly 10% of them trucks, projected to reach 152 by 2046. The structure is 26 ft (7.8 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesLiddle Road
CrossesUnnamed Creek
Location0.3 MI N Roscoe RD
RouteCity Street 0
CountyWinnebago County
StateIllinois
Coordinates42.4162, -89.04876
Functional classUrban 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 protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no 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 rating56.4 US tons
Inventory rating34 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 15
Structure length26 ft (7.8 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 traffic125 (2022)
Projected traffic152 by 2046
Trucks10%
Lanes on structure2
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 Liddle Road over Unnamed Creek built?

It was built in 1971, making it 54 years old in 2025.

What condition is Liddle 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 March 2023.

How much traffic does Liddle Road over Unnamed Creek carry?

About 125 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is Liddle Road over Unnamed Creek?

The structure is 26 ft (7.8 m) long with a longest span of 10 ft (3 m).

Who owns Liddle Road over Unnamed Creek?

It is owned by the City or Municipal Highway Agency.