US Bridges

Ritchie RD over I-39 & US 51

Fair

Ogle County, Illinois · 2 MI E of Rochelle · Structure no. 071006400000000

Built
1980
45 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
285 ft
2 main spans
Daily traffic
500
2022 count
Owner
State
State Highway Agency

About this bridge

Ritchie RD over I-39 & US 51 is a steel continuous stringer/multi-beam or girder carrying Ritchie RD over I-39 & US 51 in Ogle County, Illinois. It was built in 1980, so it is 45 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 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 500 vehicles a day, roughly 20% of them trucks, projected to reach 572 by 2046. The structure is 285 ft (86.9 m) long and 36 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

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CarriesRitchie RD
CrossesI-39 & US 51
Location2 MI E of Rochelle
RouteCounty Highway 0
CountyOgle County
StateIllinois
Coordinates41.89822, -89.01698
Functional classRural Minor 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating91.8 US tons
Inventory rating55 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20 + Mod
Structure length285 ft (86.9 m)
Longest span117 ft (35.7 m)
Deck width36 ft (11 m)
Roadway width33 ft (10 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2022)
Projected traffic572 by 2046
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed8.7 mi (14 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Ritchie RD over I-39 & US 51 built?

It was built in 1980, making it 45 years old in 2025.

What condition is Ritchie RD over I-39 & US 51 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 April 2024.

How much traffic does Ritchie RD over I-39 & US 51 carry?

About 500 vehicles per day (2022 count), of which roughly 20% are trucks.

How long is Ritchie RD over I-39 & US 51?

The structure is 285 ft (86.9 m) long with a longest span of 117 ft (35.7 m) and a deck 36 ft wide.

Who owns Ritchie RD over I-39 & US 51?

It is owned by the State Highway Agency.