US Bridges

New City RD / Ch 4 over I-55/ Palm Road

Fair

Sangamon County, Illinois · 1.8M S Lk Spfld Brdg · Structure no. 084008100000000

Built
1969
56 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
366 ft
3 main spans
Daily traffic
2,900
2022 count
Owner
State
State Highway Agency

About this bridge

New City RD / Ch 4 over I-55/ Palm Road is a steel continuous stringer/multi-beam or girder carrying New City RD / Ch 4 over I-55/ Palm Road in Sangamon County, Illinois. It was built in 1969, so it is 56 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 2,900 vehicles a day, roughly 6% of them trucks, projected to reach 1,162 by 2046. The structure is 366 ft (111.5 m) long and 38 ft wide.

Location

Open in Google Maps
CarriesNew City RD / Ch 4
CrossesI-55/ Palm Road
Location1.8M S Lk Spfld Brdg
CountySangamon County
StateIllinois
Coordinates39.66991, -89.64834
Functional classUrban 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.1 US tons
Inventory rating36.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadHS 20
Structure length366 ft (111.5 m)
Longest span101 ft (30.7 m)
Deck width38 ft (11.6 m)
Roadway width34 ft (10.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,900 (2022)
Projected traffic1,162 by 2046
Trucks6%
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 New City RD / Ch 4 over I-55/ Palm Road built?

It was built in 1969, making it 56 years old in 2025.

What condition is New City RD / Ch 4 over I-55/ Palm Road 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 June 2024.

How much traffic does New City RD / Ch 4 over I-55/ Palm Road carry?

About 2,900 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is New City RD / Ch 4 over I-55/ Palm Road?

The structure is 366 ft (111.5 m) long with a longest span of 101 ft (30.7 m) and a deck 38 ft wide.

Who owns New City RD / Ch 4 over I-55/ Palm Road?

It is owned by the State Highway Agency.