US Bridges

Chatham Road over I-72/US 36/NS RR

Fair

Sangamon County, Illinois · 1.5M S Wabash Av · Structure no. 084018500000000

Built
1991
34 years old
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
544 ft
6 main spans
Daily traffic
8,600
2022 count
Owner
State
State Highway Agency

About this bridge

Chatham Road over I-72/US 36/NS RR is a steel continuous stringer/multi-beam or girder carrying Chatham Road over I-72/US 36/NS RR in Sangamon County, Illinois. It was built in 1991, so it is 34 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 8,600 vehicles a day, roughly 3% of them trucks, projected to reach 8,383 by 2046. The structure is 544 ft (165.7 m) long and 43 ft wide.

Location

Open in Google Maps
CarriesChatham Road
CrossesI-72/US 36/NS RR
Location1.5M S Wabash Av
CountySangamon County
StateIllinois
Coordinates39.74298, -89.68704
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than 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 rating79.3 US tons
Inventory rating47.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans6 (+1 approach)
Design loadHS 20
Structure length544 ft (165.7 m)
Longest span94 ft (28.8 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,600 (2022)
Projected traffic8,383 by 2046
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and railroad
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 Chatham Road over I-72/US 36/NS RR built?

It was built in 1991, making it 34 years old in 2025.

What condition is Chatham Road over I-72/US 36/NS RR 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 February 2025.

How much traffic does Chatham Road over I-72/US 36/NS RR carry?

About 8,600 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Chatham Road over I-72/US 36/NS RR?

The structure is 544 ft (165.7 m) long with a longest span of 94 ft (28.8 m) and a deck 43 ft wide.

Who owns Chatham Road over I-72/US 36/NS RR?

It is owned by the State Highway Agency.