US Bridges

Ridgely RD over I-55

Fair

Sangamon County, Illinois · .5M S Sang Av/Il 54 · Structure no. 084010200000000

Built
1963
62 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
222 ft
4 main spans
Daily traffic
800
2022 count
Owner
State
State Highway Agency

About this bridge

Ridgely RD over I-55 is a prestressed concrete stringer/multi-beam or girder carrying Ridgely RD over I-55 in Sangamon County, Illinois. It was built in 1963, so it is 62 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 800 vehicles a day, roughly 2% of them trucks, projected to reach 1,111 by 2046. The structure is 222 ft (67.8 m) long and 30 ft wide.

Location

Open in Google Maps
CarriesRidgely RD
CrossesI-55
Location.5M S Sang Av/Il 54
RouteCity Street 0
CountySangamon County
StateIllinois
Coordinates39.824, -89.59275
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.8 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 15
Structure length222 ft (67.8 m)
Longest span68 ft (20.6 m)
Deck width30 ft (9.1 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic800 (2022)
Projected traffic1,111 by 2046
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 Ridgely RD over I-55 built?

It was built in 1963, making it 62 years old in 2025.

What condition is Ridgely RD over I-55 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 October 2024.

How much traffic does Ridgely RD over I-55 carry?

About 800 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Ridgely RD over I-55?

The structure is 222 ft (67.8 m) long with a longest span of 68 ft (20.6 m) and a deck 30 ft wide.

Who owns Ridgely RD over I-55?

It is owned by the State Highway Agency.