US Bridges

Cunningham RD over Cn RR

Poor

Winnebago County, Illinois · 0.5 MI E Pierpont · Structure no. 101300300000000

Built
1955
70 years old, rebuilt 1990
Condition
Poor
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
137 ft
3 main spans
Daily traffic
2,650
2022 count
Owner
County
County Highway Agency

About this bridge

Cunningham RD over Cn RR is a steel continuous stringer/multi-beam or girder carrying Cunningham RD over Cn RR in Winnebago County, Illinois. It was built in 1955 and reconstructed in 1990, so it is 70 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 2,650 vehicles a day, roughly 5% of them trucks, projected to reach 2,475 by 2046. The structure is 137 ft (41.8 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesCunningham RD
CrossesCn RR
Location0.5 MI E Pierpont
CountyWinnebago County
StateIllinois
Coordinates42.26527, -89.12615
Functional classUrban Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating64.6 US tons
Inventory rating34.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length137 ft (41.8 m)
Longest span52 ft (15.7 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,650 (2022)
Projected traffic2,475 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Cunningham RD over Cn RR built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1990.

What condition is Cunningham RD over Cn RR in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2024.

How much traffic does Cunningham RD over Cn RR carry?

About 2,650 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Cunningham RD over Cn RR?

The structure is 137 ft (41.8 m) long with a longest span of 52 ft (15.7 m) and a deck 30 ft wide.

Who owns Cunningham RD over Cn RR?

It is owned by the County Highway Agency.